Quintessa provides technical and strategic consultancy, research and software to facilitate a low carbon energy future.
Quintessa is an employee-owned company providing leading-edge scientific, mathematical and strategic consultancy, scientific software development and research to public and private science-based organisations, primarily in the energy and environmen…
Case Studies of Quintessa - The Scientific and Mathematical Consultancy
Latest news from Quintessa - the Scientific and Mathematical Consultancy
From its inception the nuclear industry has relied upon science and mathematics to solve its problems. Quintessa continues this tradition within a 21st century context through our world-class nuclear energy consulting services including research, d…
Quintessa's low carbon energy consulting services support to some key initiatives on the path to decarbonising the energy sector including carbon capture and storage, energy storage, transitional energy technologies and the decommissioning of oil &…
We support scientifically-based organisations in making strategic and operational decisions. Our 'data to decisions' approach endeavours to take due account of all relevant evidence and is grounded on sound science and systems thinking.
Quintessa provides geoscientific consultancy and research in geology, geochemistry and hydrogeology for site selection and characterisation including the interpretation and modelling of laboratory and field experiments.
Quintessa's mathematical consulting services cover the development and application of software for mathematical modelling, simulation, statistical modelling, operational research and data science & analytics. Our experienced mathematicians are able…
Quintessa provides a comprehensive range of risk assessment and performance assessment services with performance measures relating to the risk, safety, feasibility, vulnerability and reliability of potential impacts including on the environment and…
AMBER allows users to build and visualise 3D dynamic compartment models of contaminants in environmental, biological and engineered systems. The software is flexible, transparent, fully probabilistic and allows users to simulate contamination from…
TESLA is a software tool which aims to support decision makers structure and assess information, of which there is potentially a large amount from multiple sources.
QPAC is the general purpose modelling software used in much of the mathematical modelling that Quintessa undertakes for its clients
Custom software encapsulates solutions to specific client needs. We work in partnership with clients to develop specifications and to deliver cost-effective solutions including training and continuing support.
Quintessa's online initiative makes scientific modelling tools and databases available via the internet thereby increasing their availability and usefulness, and ultimately increasing the openness and transparency of decisions.
A range of Quintessa software and documentation is available for download below, including AMBER, GraphGrabber, Portfolio Picker, QPAC, TESLA, and LATIN.
Newsletter Archive of Quintessa - The Scientific and Mathematical Consultancy
Quintessa provides scientific software development services including general-purpose and in-house mathematical modelling and statistical modelling tools, custom software applications and online modelling tools and databases.
Quintessa provides training tailored to the needs of client personnel in all of our areas of core competence and in the application of associated software packages.
Newsletters of Quintessa - The Scientific and Mathematical Consultancy
Quintessa aims to use the best tools for the job in its problem solving activities.
Quintessa provides support to the development, optimisation, siting and environmental impact of renewable energy devices through its mathematical and statistical modelling and decision support services.
Quintessa provides a range of services to help utilise the subsurface safely and optimally for sustainable storage of resources, isolation of potentially hazardous materials, resource exploitation and infrastructure development. Examples include en…
List of services provided by Quintessa
A list of Quintessa business sectors
Implementation of the Leggett biokinetic model for lead in AMBER.
AMBER has been used to assess the post-closure safety of geological repositories for low and intermediate level radioactive waste (LILW).
CHANSELA is a custom portfolio selection tool developed by Quintessa for British Energy. It takes account of a wide range of factors to support decisions on which selection of channels of AGRs should be inspected to support continued safe operation…
CoreStats is an application developed by Quintessa for British Energy specifically to model the evolution of the graphite core of Advanced Gas-cooled Reactors (AGRs) using a statistical approach.
FracAffinity has been developed by Quintessa for the Japan Atomic Energy Agency (JAEA, formerly JNC) to model saturated and unsaturated flow in fractured (stochastic and/or deterministic discrete features) and/or permeable geological media.
Quintessa has strength in depth relating to understanding the features, events and processes affecting the evolution of geological disposal facilities, and the development and application of state-of-the-art mathematical models representing process…
Quintessa provides quantitative support to geosphere and biosphere site characterisation programmes including conceptual understanding, synthesis of data, uncertainty and numerical analysis across a wide range of scientific disciplines.
Quintessa supports decisions on waste packaging for geological disposal in two distinct areas: options appraisal and optimisation studies; and research into failure mechanisms during the operational and post-closure phases.
Safety cases for geological disposal facilities require a sound understanding of the interaction and evolution of waste packages with engineered barriers and the host rock, mediated by groundwater and any other fluids present or generated.
Quintessa has in-depth understanding of the barrier functions provided by the geosphere for a range of geological disposal concepts, and how these evolve over time due to thermal, hydrological, mechanical and chemical interactions.
For the past two decades Quintessa staff and associates have been at the forefront of developing and applying methodologies and models for contaminant transfer in the biosphere, and assessing potential doses and impacts to people and wildlife.
Quintessa supports developers and regulators of geological disposal facilities in developing Performance Assessments (PAs) and Environmental Safety Cases (ESCs) that provide quantitative and qualitative evidence relating to long-term safety.
Quintessa's hydrogeological modelling team endeavours to build a sound conceptual model of the system that is compatible with all the available hard and soft data using the most appropriate in-house or third party software, such as QPAC of FEFLOW.
STMAN is a source term performance assessment modelling code for the near field transport and decay of radionuclides released from nuclear waste repositories, developed for the Swiss nuclear waste agency Nagra.
Quintessa has supported a wide range of projects that support disposability assessments or for which disposability is a key concern. We have supported both the derivation of disposability requirements (see also our Waste Acceptance page) and aspect…
Quintessa has significant experience of designing and running BAT processes for a wide variety of wastes, and has contributed to regulatory and best-practice guidance on strategic options assessments.
Quintessa develops software to assist in decisions on which fuel channels in nuclear reactors should undergo periodic inspections taking account of operational constraints and competing requirements for data.
Quintessa uses FEFLOW for groundwater flow, contaminant transport and heat transport calculations.
PARIZADE is a software tool developed for the Japan Atomic Energy Agency to assist in management of data and information, in particular to help retain a memory of the origin of data and information sources, including what restrictions or limits app…
Quintessa staff work alongside other specialists to define waste and site characteristics and monitoring strategies, and to interpret the results.
Quintessa provides quantitative geological consulting support to site characterisation programmes for radioactive waste disposal, the remediation of radioactively contaminated sites, geological storage of CO2, and natural gas storage.
Quintessa has in-depth geochemical expertise relating to site investigations, the evolution of underground enginered structures, and fluid migration and reaction
Quintessa develops and maintains an online database of Features, Events and Processes (FEPs) that are of potential importance to the performance of carbon dioxide geological storage systems designed to mitigate climate change.
Quintessa worked with the BGS and the University of Rome to model the important processes taking place at the Latera site in Italy, creating a soil/plant subsystem model that includes an innovative representation of the effects of CO2 on plants.
The PRISM code uses a wrapped version of Quintessa’s AMBER compartmental modelling software to represent radionuclide transport in terrestrial food chains following accidental or planned releases of radioactivity to the atmosphere.
PICNIC-TD was developed by Quintessa for the Swiss agency Nagra. It calculates the transport of radionuclides from a repository at depth to the surface or near-surface, in both fractured and porous systems with time-varying flow fields.
Quintessa staff and associated have contributed to the development of Integrated Waste Strategies for a range of UK nuclear licensed sites. We have also supported NDA directly in identifying opportunities across its waste management portfolio, for…
An overview of Quintessa's services in the nuclear power generation sector
Quintessa staff provide services across the entire life-cycle of radioactive management, from decommissioning and site restoration planning, to waste treatment strategy development and optimisation, interim storage and disposal.
Consultancy services relating to the restoration of radioactively contaminated nuclear sites.
Quintessa can bring perspective to the development of sound decommissioning strategies to be developed by: exploring the merits of different decommissioning strategies in terms of safety, cost and other factors; reviewing existing decommissioning p…
Quintessa provides support to near-surface disposal programmes, from design optimisation through to long-term assessments of the impacts on the environment, in the UK and overseas.
Mathematical modelling and simulation lie at the heart of Quintessa, whose core competence is in the formulation, development and application of innovative mathematical and statistical models and associated scientific software.
Quintessa provides a comprehensive statistical modelling consulting service that deliver analysis and software tools together with associated support to clients in a range of sectors.
SwiBAC (Swiss Biosphere Assessment Code) has been developed by Quintessa for the Swiss
National Cooperative for the Disposal of Radioactive Waste (Nagra) to provide a capability to assess potential radiological exposures in the biosphere for comp…
The scientific basis for environmental decisions comprises the understanding of generic Features, Events & Processes (FEPs) augmented by system-specific understanding and characterisation data. In order to ensure that an assessment is comprehensive…
At the outset of any scientifically-based study it is essential to state its context, objectives and assumptions. This frames the assessment and establishes the main aims, assumptions and constraints as well as other aspects like the intended audie…
Description of system definition and scenario development, together with relevant Quintessa expertise
Quintessa has extensive expertise in developing system models that include the key processes and interactions, and applying these to understand and quantify how the system could evolve and the associated environmental impacts.
Quintessa has extensive experience of documenting and illustrating assessments for a range of audiences in order to synthesise the understanding of system behaviour, assess the degree of confidence in the assessment results, and identify the next s…
Information on Quintessa's consultancy services from data to decision making
Quintessa provides qualitative and quantitative portfolio selection (portfolio analysis) consulting services and software for decision making in the energy and environmental sectors.
Demonstrating the maintenance of the physical integrity of reactor cores which experience intense thermal and radiation stresses is a critical part of the safety case for their continued operation. Quintessa provides mathematical & statistical mod…
AMBER is being used for modelling the transfer of radionuclides in the environment and through the food chain, following routine releases of radionuclides.
Quintessa developed software to convert the Yucca Mountain database from its native EQ3/6 format into PHREEQC format to enable the Canadian Nuclear Waste Management Organisation (NWMO) to use it in their preferred geochemical modelling code.
AMBER has been used to model the post-closure release of radionuclides from waste packages and their subsequent transport through surrounding engineered barriers in several geological disposal facilities.
Information about Quintessa's options appraisal consultancy services
Quintessa provides decision support services for the development of national policies and strategies.
AMBER has been used as a performance assessment tool for the geological disposal of High-level Waste (HLW) and Spent Fuel (SF).
Use of AMBER in the borehole disposal of sealed sources
Use of AMBER in developing disposal and packaging options including a LILW options studies in Slovenia and Canada.
Quintessa's core geoscience capability is to provide synthesis of data, conceptual understanding, uncertainty and numerical analysis across a wide range of geoscientific disciplines.
Quintessa has developed technical guidance and associated software application for Radioactively Contaminated Land Exposure Assessment in support of the Part IIa regulatory regime of the Department of the Environment, Food and Rural Affairs (Defra)…
Gases will be generated in a Geological Disposal Facility (GDF).
QPAC is being used to model coupled thermal, hydrological and mechanical (THM) processes in bentonite buffers.
QPAC has been used to model the ecosystem impacts of naturally occurring surface fluxes of CO₂.
QPAC is being used to model coupled Thermal-Hydraulic-Mechanical and Chemical (THMC) processes in clay.
QPAC has been used in a code cross-comparison exercise in order to assess modelling approaches when considering migration of CO₂ through strongly heterogenous porous media.
QPAC has been used to model the flow of CO₂ and transport of other gases through graphite.
Cement well seals are important features in geological storage systems for CO2. QPAC has been used to undertake fully-coupled geochemical modelling of the materials in and around the well, focusing on cement degradation.
Quintessa staff are specialists in understanding the behaviour of radionuclides in environmental systems. Our capabilities extend from understanding experimental data to modelling radionuclide movement through the environment, and evaluating poten…
Quintessa undertakes safety and performance assessments for near-surface disposal facilities in the UK and overseas, often in support of major regulatory submissions.
QPAC has been used to simulate coupled deposition, compaction and chemical alteration of clay sediments.
Quintessa works closely with clients to develop scientific software applications that encapsulate solutions to their problems.
In QPAC the multi-phase flow module provides a capability to model the movement of water, multiple gas phases, water vapour and the dissolution of gases in the water.
A core application of AMBER is in assessing the migration and fate of radionuclides from near-surface disposal facilities for low-level radioactive waste.
AMBER is being used to model contaminant migration and potential exposures arising from accidental radionuclide releases into the environment and historical contamination.
AMBER has been used to model marine and sediment processes including contaminant transport via marine biota and sea to land transfer processes.
AMBER has been used to assess the fate of agrochemicals in the environment and their resulting health impacts.
QPAC has been used to develop state-of-the-art models of iron-bentonite interactions.
Quintessa provides support to developers and regulators of carbon dioxide geological storage systems in the selection of potential sites, the development of monitoring and mitigation plans, and the assessment of their long-term performance.
An environmental safety case (ESC) is a key submission to safety and environmental regulators that sets out a range of arguments demonstrating optimisation of disposal facility design and operations, and showing that the facility will be safe both…
Quintessa supports radioactive waste organisations apply the principle of optimisation to the development of waste disposal facilities to ensure that impacts to humans and the environment can be shown to minimised, once other practicability-relevan…
Appropriate Waste Acceptance Criteria (WAC) are an essential component of facility design and operation. They ensure that the wastes are physically suitable for a disposal facility, and that the inventory is controlled and is consistent with releva…
Download documentation, publications and white papers related to the QPAC general purpose modelling tool.
A key component of assessing potential exposures arising from environmental radioactivity is an understanding of radionuclide behaviour within the food chain. Quintessa has considerable experience of assessing potential exposures arising from the…
Quantitative assessment studies support to decisions needed to ensure that naturally occurring radioactive materials (NORM) and technologically-enhanced NORM (TENORM) are appropriately managed.
Quintessa is able to provide quantitative assessment support to decisions needed regarding the management of radium contaminated areas.
Quintessa is experienced in applying wildlife dose assessment methodologies in support of safety and performance assessment.
Quintessa is experienced in assessing radioactive particle transport and potential exposure in support of remediation decisions.
Quintessa is experienced in assessing radionuclide behaviour and potential exposure across a broad spectrum of environmental systems and using the resulting understanding in support of decisions.
Quintessa can provide support in developing appropriate environmental monitoring programmes and/or refining existing programmes that have evolved with time to help ensure that they are proportionate and are focused on key locations, media and pathw…
Quintessa provides decommissioning strategy support to nuclear site operators.
Quintessa can help to optimise the waste management element of decommissioning. In particular, we can identify opportunities for minimising wastes and recycle or reuse materials. Where wastes need to be disposed, we can help to determine the most a…
Quintessa has been supporting the development of restoration strategies for more than a decade, at sites like Dounreay – which is at the forefront of nuclear site decommissioning. This has often involved working closely with the site’s staff and un…
Quintessa was involved in the initial consultation work at several sites, supporting the site’s technical and communications teams. Engagement on interim management strategies in lieu of final restoration is also key. We have developed structured p…
Quintessa has specialists in geoscience, chemistry and environmental processes who have extensive track records in developing site understanding, both at the conceptual and measurement level. We also have a deep understanding of the implications of…
Tiered assessment of risks from contamination using fit-for-purpose models.
Development of Environmental Safety Cases based on structured and robust arguments using multiple lines of reasoning.
Quintessa has significant experience of designing decision support processes that involve appropriate interaction with stakeholders to the benefit of all parties.
QIS (Quintessa Information System) has been designed and developed by Quintessa to incorporate our management processes and associated information into an integrated web-based system accessible to all staff.
CABARET (Cement And Bentonite Alteration due to REactive Transport) is a GUI-driven software package developed by Quintessa for simulating reactions between cementitious materials and bentonite in multiple dimensions.
The sensitivity analysis capabilities of TESLA, visualised via the Tornado Plot, can be used to prioritorise the extent to which different areas of uncertainty in complex projects contribute to confidence in the overall decision. This provides a st…
Evidence Support Logic (ESL), implemented in TESLA, can be used to support decisions on the selection of geological sites for complex projects including the storage of carbon dioxide and other substances, and the disposal of radioactive waste. This…
Safety cases, consisting of a diverse set of arguments and evidence, are required for many technological developments including oil and gas extraction and storage, and the geological disposal of chemical and radioactive wastes. Evidence Support Log…
Evidence Support Logic, as implemented in TESLA, can provide a structured approach to demonstrating regulatory compliance against subjective criteria when judging multiple lines of evidence that are uncertain and/or conflicting.
Quintessa has developed the ACSIS (Atmospheric Corrosion of Stainless Steel in Stores) software application to assess the potential for atmospheric corrosion of stainless steel ILW containers in storage and during the operational phase of a Geologi…
Quintessa has developed a PHREEQC version of the Yucca Mountain EQ3/6 thermodynamic database that includes 'Pitzer data'to parameterise the activity coefficients of aqueous species. The work was carried out for NWMO who have allowed Quintessa to di…
Quintessa’s operational research consulting services provide objective, analytical and quantitative support for the evaluation and optimisation of complex situations arising in industry, services and business. In the UK this is usually called Opera…
Quintessa's Land Quality Management consulting services help owners of nuclear sites decide how best to deal with the contamination. Our expertise ranges from detailed characterisation and understanding of contaminant behaviour in the environment a…
Quintessa provides Land Quality Strategy consulting services and End State consulting services for contaminated nuclear sites.
Quintessa's stakeholder engagement consulting services have assisted UK nuclear sites to develop acceptable End State strategies through facilitating consultations with local communities.
Quintessa provides consulting services to assimilate, interpret and integrate information on site characteristics to build a conceptual and quantitative understanding on the current and future states of contaminated nuclear sites.
Quintessa carries out tiered radiological risk assessments for contaminated nuclear sites using models that are fit for purpose in their level of detail. Quintessa can draw on substantial expertise in modelling environmental change, groundwater tr…
Quintessa develops robust and readable Environmental Safety Cases drawing on multidisciplinary lines of reasoning.
Quintessa works in partnership with its clients to deliver innovative data analytics consulting solutions, combining programming skills with in-depth mathematical analysis. Based on a thorough understanding of the problem and the associated data,…
BrickFit is a general purpose statistical modelling package developed by Quintessa for EDF Energy (formerly British Energy). It is designed to enable statistical models to be developed simply and robustly, fitted to the available historical data an…
Quintessa is currently developing web-based database-driven applications for the Nuclear Energy Agency. All work is undertaken under a Quality Management System that is certified to be in accordance with the requirements of ISO 9001:2008 and the Ti…
Quintessa develops custom software for visualising and analysing data.
Risk assessment of the underground storage of natural gas.
The transition to a low carbon energy economy will take many decades and in the interim it may be necessary to use transitional technologies in some parts of the world. Quintessa has technical and strategic consultancy expertise that can provide in…
Quintessa has produced a White Paper highlighting the benefits of shallow geological disposal for selected radioactive wastes.
Quintessa is a COMSOL Certified Consultant, and applies COMSOL Multiphysics to model a range of environmental and engineering systems.
Quintessa use GoldSim as part of our range of modelling tools to support safety assessment work in radioactive waste management.
Quintessa provides support for the deployment of new nuclear power plants in the UK.
Whenever a fuel assembly in one of the UK’s Advanced Gas-cooled Reactors (AGRs) is raised or lowered, the load on the fuel hoist and the height of the fuel is recorded. This information is known as a fuel grab load trace (FGLT). LoTAS (Load Trace…
Information about Quintessa's decision modelling consultancy services using Evidence Support Logic (ESL).
AMBER has been used as an integrated site-wide performance assessment tool supporting strategic decisions about the decommissioning and closure of nuclear sites.
Evaluate TESLA 2.1.1 decision-support software and download supporting documentation
This page provides a download for a previous version of TESLA, 2.1.0.
This page provides a download for a previous version of TESLA, 1.11.0.
This page provides a download for a previous version of TESLA, 1.10.1.
This page provides a download for a previous version of TESLA, 1.10.0.
This page provides a download for a previous version of TESLA, 1.9.0.
This page provides a download for a previous version of TESLA, 1.8.1.
This page provides a download for a previous version of TESLA, 1.8.0.
This page provides a download for a previous version of TESLA, 1.7.1.
This page provides a download for a previous version of TESLA, 1.7.0.
This page provides a download for a previous version of TESLA, 1.6.11.
Download Portfolio Picker, Quintessa's free generic portfolio selection tool.
Download LATIN, a free Laplace Transform Inverter tool developed by Quintessa.
Download the free data retrieval software Graph Grabber
Download a free demonstration version of AMBER 6.2
AMBER 6.2 download page for licensed users
Newsletter of Quintessa's Carbon Services - low carbon energy consulting services supporting some key initiatives on the path to a low carbon energy future
Newsletter of Quintessa's Nuclear Services - world-class nuclear power consulting services including research, development, modelling, risk assessment and decision support.
Newsletters of AMBER - The Compartment Modelling Software
News story about Quintess'as work on the PCESC for the D12225 shaft at Dounreay
2009 news story about Quintessa's work modelling the alteration of clay at the Searles Lake natural analogue
Over the past four years, Quintessa has been providing biosphere assessment support to the Nuclear Decommissioning Authority (NDA) Radioactive Waste Management Directorate (RWMD) safety case programme relating to geological disposal of the United K…
In January 2012, a Joint Review Panel was appointed by the federal Minister of the Environment and the President of the Canadian Nuclear Safety Commission and mandated to assess the environmental effects of Ontario Power Generation’s project for th…
2005 news story about the publication by Quintessa and the Biritish Geological Survery of a position paper highlighting environmental issues associated with the geological storage of CO2
News story about James Penfold, a Principal Constulant at Quintessa's Henley office, doing the Three Peaks Challenge to raise money for Age Concern
2005 news story about the opening of Quintessa's new office in Warrington
2005 news story about Quintessa's submission of written evidence to House of Commons Select Committee on Science and Technology on carbon capture storage technology.
2005 news story about a paper presented at the ICEM05 conference elaborating upon a participatory methodology to pursue the objective of studying and defining mechanisms for local actors to stretch national players in decision making for radioactiv…
2005 news story about Quintessa's work for UK Nirex on waste package scenario modelling
News story about Quintessa's Risk Assesment work using QPAC and TESLA in the CO2 storage sector
2009 news story the results of the Henley Schools Environmental Science competition, sponsored by Quintessa Limited
2005 news story about the free downloadable demo version of the AMBER compartment modelling software available from Quintessa-online
Quintessa Presents Borehole GSA at IAEA Disused Sealed Sources Workshop
Performance Assessment framework for CO2
Quintessa has converted the Yucca Mountain Pitzer database from EQ3/6 format to to PHREEQC format at the request of NWMO. To obtain a copy, please contact Steven Benbow.
2005 news story about the preliminary post-closure safety assessment of the Dounreay shaft
2009 news story
10th International Conference on Greenhouse Gas Control Technologies - GHGT10
International workshop on iron-bentonite interactions
Quintessa staff will be presenting 7 papers at the International Conference on Greenhouse Gas Technologies (GHGT-11) to be held in Kyoto, Japan between 18th and 22nd November 2012.
2005 news story about the independent review of tasks 6A, 6B and 6B2 of the 'sp' task force on modelling of groundwater flow and transport of solutes
2005 news story about the new option to download or purchase TESLA - Quintessa's decision support software - online
Quintessa has undertaken a study for the Nuclear Decommissioning Authority (NDA) Radioactive Waste Management Directorate (RWMD) to examine the post-closure safety implications of proposals for the direct packaging of Intermediate Level Waste (ILW)…
QPAC 3.0 Released
Quintessa is a participant in the newly-established COWAM 2 project on radioactive waste management governance, which has been developed within the European Commission's Sixth Framework Programme.
News 2004 about Quintessa's contribution to TRENDS in the European Offshore Energy Industry
2005 news story about the visit of Dr Shang Zhaorong of the Nuclear Safety Centre, China, visiting Quintessa's Henley-on-Thames office
2005 news story about Alan Paulley of Quintessa joining the Civil and Environmental Engineering Industrial Advisory Board of the University of Edinburgh
2005 news story about Quintessa's assistance in facilitation support for CoRWM
2005 news story about Quintessa's groundwater modelling of the Dounreay shaft
2002 news story about the release of Version 4.4 of AMBER, Quintessa's compartment modelling software
2002 news story about Peter Robinson's perfect score in a numerical analysis challenge.
2002 news story about a published paper regarding modelling geochemical Interactions of bentonite and cement
2002 news story about Quintessa's contract to work for the South African Nuclear Energy Corporation (NECSA)
2002 news story about Quintessa's Quality Assurance registration
2002 news story about Quintessa's response to the UK Government's consultation exercise on managing radioactive waste safely
2002 news story about the USA selecting a deep disposal site for spent nuclear fuel
2002 news story about Quintessa's attendance at a CO2 FEP Workshop in Rome
2003 news story about Quintessa's development of PRISM Version 2.0 for Foodchain Modelling at the Food Standards Agency
The SAFEGROUNDS project, managed by CIRIA, is a forum for developing and making available good practice guidance on the management of radioactively and chemically contaminated land on nuclear and defence sites in the UK
The United States is moving closer to selecting a national facility for the underground disposal of highly radioactive materials.
2003 news story about Quintessa's involvement in the BPEO project for Dounreay
2003 news story about Quintessa work in developing Waste Package Evolution Scenarios.
2003 news story about Quintessa's work evaluating the post-closure safety of SFR
Quintessa provides training courses in the use and application of the compartment modelling software AMBER that is jointly supported with Enviros.
2003 news story about the third VALDOR symposium in Stockholm, Sweden
2003 news story about Quintessa's completed study into near-field models and associated computer codes for Ontario Power Generation (OPG)
2003 news story about the release of AMBER Version 4.5 at a Japanese workshop
2004 news story about working partnership agreement between Quintessa Limited and Goldsim Technology Group
2004 news story about how a Quintessa study has helped underpin public consultation on the long-term management of low and intermediate level radioactive waste in Ontario, Canada
On 7-9 December 2016, the Nuclear Energy Agency (NEA) hosted the fifth International Conference on Geological Repositories (ICGR 2016) jointly with the French National Radioactive Waste Management Agency, Andra, in Paris, France.
2004 news story about the verification of Quintessa's Raiden3 software
2004 news story about the launch of Quintessa's online database for CO2 Storage Features, Events & Processes
2004 news story about Quintessa's response to UK HSE's consultative document on proposed regulatory criteria for de-licensing nuclear sites
2004 news story about Quintessa's workshop on performance assessment for UKAEA staff
2004 news story about Quintessa's release of TESLA, The Evidence Support Logic Application, Version 1.2
2004 news story about Quintessa's modelling of Waste Package Evolution Scenarios for the Nirex Phased Disposal Concept
2004 news story about Quintessa's response to the UK Government Consultation on decommissioning the UK's nuclear facilities
2004 news story about the development of Quintessa's Raiden3 fully coupled reactive geochemical transport and flow code
2005 news story about Quintessa providing support to British Energy in calculations on the physical integrity of AGR Graphite Cores
2005 news story about Quintessa's response to CORWM's 2nd consultation document on managing radioactive waste
2005 news story about the presentation of the PRISM foodchain modelling software at the SRO symposium in Cardiff
2005 news story about Quintessa being contracted by the UKAEA to develop a detailed Post-Closure Safety Case for the Dounreay Shaft
2005 news story about Defra commissioning Quintessa to develop a Radioactively Contaminated Land Exposure Assessment (RCLEA) model for quantitative risk assessment
2005 new story about how TESLA has been used by Andrew Bowden in a paper describing an evidence-based uncertainty analysis framework for building confidence in geological models
2005 news story about Quintessa providing numerical modelling support to a project investigating the feasibility of sequestering atmospheric CO2 in geothermal areas
Quintessa, with the support of consortium partners SCK-CEN, Belgatom and the Josef Stefan Institute, has completed a contract under the European Commission's PHARE nuclear safety programme to provide assistance in the development of conceptual desi…
Quintessa has responded to the recent DEFRA consultation on the UK's management strategy for solid Low Level Radioactive Waste.
The British Geological Survey (BGS) has recently undertaken a project to examine the potential for leakage of natural gas from Underground Gas Storage (UGS) in salt caverns and depleted oil/gas reservoirs.
NDA is requiring site licensees to develop proposals for the End State of its sites, working with local stakeholder groups.
The 'End State' of a nuclear site is its physical condition when decommissioning and clean-up has finished.
Ontario Power Generation (OPG) is proposing to build a Deep Geologic Repository (DGR) for Low and Intermediate Level Waste near the existing Western Waste Management Facility at the Bruce Site in Ontario.
A new version of the AMBER compartment modelling tool has recently been released.
2006 news story about Quintessa hosting Thana Karupiah of MINT for one month's fellowship in Henley-on-Thames
2006 news story about Quintessa's independent support to CORWM
2006 news story about Quintessa's involvement in supporting the development of a lifetime plan for the LLWR at Drigg
2006 news story about a CO2ReMoVe, a new research programme into carbon capture and storage technology
2006 news story about the publication of results from the Tono Natural Analogue Project
2006 news story about Quintessa's contract to develop the preliminary post-closure safety case for the Dounreay shaft
2006 news story about Defra commissioning Quintessa with the support of URS to develop a radioactively contaminated land exposure assessment (RCLEA) methodology
Quintessa is sponsoring a biennial competition for the best environmental science project from schools in Henley-on-Thames.
In June 2008, Steve Benbow attended the first joint network meeting of the IEA Greenhouse Gas (GHG) R&D Programme.
So-called ‘engineered barriers’ perform a critical role in the multibarrier concept for the geological disposal of radioactive wastes.
Within the BIOPROTA international cooperation framework, Laura Limer and Graham Smith are involved in the chlorine-36 working group.
Mike Egan spent two weeks in Richland, Washington State, exploring the potential use of Evidence Support Logic (ESL) in the assessment of confidence in key issues relating to the development of a long-term safety case for in-situ disposals of waste…
The first version of the free software application, Graph Grabber, has been released to facilitate the extraction of data from scanned graphs.
Quintessa is currently working with Jacobs UK to support Sellafield Limited in carrying out options studies for the management of low-level radioactive wastes (LLW) that are produced and stored on the Sellafield site. Because of pressures on capaci…
As part of the EC NF-PRO project, Quintessa is developing new models for the alteration of bentonite buffers in contact with corroding iron-based radioactive waste canisters.
Quintessa staff and associates undertook a review for NDA RWMD on bentonite key properties, processes and issues for consideration in the UK context.
Quintessa ran a one-week workshop in Performance Assessment (PA) for technical and project management staff from UKAEA Dounreay in late October 2007.
In June 2006 the SAFEGROUNDS Learning Network began a major project to produce a new suite of guidance documents on the management of contaminated land on nuclear and defence sites. These will take into account experience as well as technical, regu…
Particles of irradiated nuclear fuel were first discovered in the marine environment around Dounreay, Scotland, in 1983. Since then, there has been considerable work devoted to the understanding the situation and how it might be managed.
Quintessa staff, working with colleagues from the British Geological Survey, applied system-level models to the volcanic Latera region in the north of Rome.
In February, Quintessa delivered a training course on the AMBER compartment modelling tool in Toronto, Canada, to participants from Ontario Power Generation (OPG) and Atomic Energy of Canada Limited (AECL).
Quintessa's TESLA software package supports transparent decision making for complex problems, making use of Evidence Support Logic (ESL). The software offers an easy-to-use graphical interface, allowing decisions to be broken down into simpler, man…
Quintessa has successfully completed a contract under EuropeAid's PHARE programme to improve the characterisation of radioactive waste at Cernavoda nuclear power plant (NPP) in Romania.
Quintessa has assisted the regulatory authorities for nuclear waste management in Sweden, SKI and SSI, in their review of SKB's SR-Can safety assessment of a final repository for spent nuclear fuel.
On the 15th May 2008, Quintessa hosted the second Work Package 4 meeting for the EC THERESA project at the Leander Boat Club, Henley-on-Thames.
Quintessa and the University of Edinburgh have recently been awarded a contract from NDA-RWMD to participate in the international DECOVALEX-2011 project
Quintessa is pleased to announce the latest update to Graph Grabber - a free downloadable program that enables the recovery of graph data from an image file.
2009 news story about an Employee Ownership Association (EOA) publication including a case study of Quintessa Limited
2009 news story about Quintessa's work supporting the NDA modelling cement behaviour using QPAC
DECOVALEX-2011: Understanding the Hydro-Mechanical Behaviour of the Ventilation Experiment in Opalinus Clay at Mont Terri
Treatment of Chemotoxic Species in the Environmental Safety Case for a Geological Disposal Facility
Thermo-Hydro-Mechanical Modelling of Bentonite in Project THERESA
Portfolio Selection Tool for AGR Channel Inspections
Richard Metcalfe recently gave an invited presentation on carbon storage risk assessment at a side meeting of the United Nations Framework Convention on Climate Change (UNFCCC) talks held in Bonn from the 6th to 17th June 2011.
Shell Develops Tool for Assessing Sub-surface Risks
Quintessa Applies Coupled Process Modelling to CO2 Storage
Quintessa Contributes Performance Assessment Methods and Tools to CO2ReMoVe
Research into Impacts and Safety in CO2 Storage (RISCS)
Dounreay Site Closure Strategy
Research shows options for waste canister design for high level waste disposal underground
In 2008 a four-year European project was launched under the 7th EURATOM Framework Programme (FP7-211333) to address the "Treatment and Disposal of Irradiated Graphite and other Carbonaceous Waste (CARBOWASTE)".
The Environment Agency recently issued a report prepared by Quintessa that explores the factors that might influence the long-term safety of an underground repository to dispose of high-level radioactive waste (HLW) and spent fuel (SF).
David Hodgkinson gave evidence on the role of Employee Ownership in business growth and start ups at the Employee Ownership Effect Inquiry
Quintessa's recent projects have demonstrated the power of Statistical Modelling methods in model predictions for complex systems.
In response to a request from The Institute of Mathematics and Its Applications, Quintessa sent a representative to Little Heath School in Tilehurst, Reading for a careers day aimed at students in year 9.
The recently published CO2QUALSTORE guideline serves as a reference for how to qualify, manage and approve CO2 geological storage sites and projects.
Quintessa contributed to a review of technologies and approaches for measurement, monitoring and verification (MMV) of possible future offshore CO₂ storage sites adjacent to the UK.
In a paper presented at the GHGT10 conference, Quintessa investigated well seal stability in the presence of CO2 using fully-coupled geochemical transport models of cement degradation developed with Quintessa's QPAC software.
Quintessa's on-line database of generic features, events and processes (FEPs) relating to systems analysis for geological storage of CO2 was established in 2004 and currently has over 1000 registered users.
Quintessa presented two poster papers at the IGD-TP inaugural Geodisposal conference held in Manchester.
RISCS (Research into Impacts and Safety in CO2 Storage) is a 4-year EC and industry project, led by the British Geological Survey (BGS) that aims to improve understanding of the potential environmental impacts of geological storage of CO2, in the u…
Quintessa Limited and its subcontractors, Geofirma Engineering Limited and SENES Consultants Limited, have recently completed the postclosure safety assessment of Ontario Power Generation's proposed Deep Geologic Repository (DGR) for Low and Interm…
The Assist (ASSessment, Integration and Strategy Team) consortium consisting of Quintessa, Galson Sciences and AREVA RMC has been awarded a framework contract to supply the Nuclear Decommissioning Authority Radioactive Waste Management Directorate…
Quintessa is part of a consortium of 18 organisations led by Amec that has been awarded a framework agreement to supply the Nuclear Decommissioning Authority Radioactive Waste Management Directorate (NDA RWMD) with research services in support of t…
The LCS project is a collaboration between JAEA, Nagra, NDA, Posiva and SKB, aimed at increasing our understanding of the interactions of cement with other engineered barrier materials and with potential host rocks.
Quintessa is currently working with Jacobs Engineering (UK) to provide decision support to the Magnox Swarf Storage Silo decommissioning project at Sellafield.
The underpinning science and technology for the geological disposal of radioactive was discussed at a conference at Loughborough University from the 18th to 20th October 2011 supported by the Nuclear Decommissioning Authority Radioactive Waste Mana…
FORGE is an EC research project considering issues associated with the generation, migration and fate of gases generated in radioactive waste disposal facilities.
A recent paper published in the Journal of Radiological Protection provides an illustrative assessment of human health issues arising from the potential release of chemotoxic and radioactive substances from a generic geological disposal facility fo…
Bentonite buffer erosion as a consequence of intrusion of dilute glacial meltwaters has been identified as a process that could lead to increased corrosion of copper canisters.
An essential activity in assessing the performance of Engineered Barrier Systems (EBSs) for disposal of radioactive waste is to demonstrate understanding of the long-term evolution of the construction materials and the neighbouring host rock, and t…
Quintessa provides post-closure radiological modelling support to the National Cooperative for the Disposal of Radioactive Waste (Nagra), the organisation responsible for preparing the technical and scientific basis for the safe, long-term manageme…
Richard Metcalfe gave an invited presentation on risk assessment during CO2 storage projects, at a technical workshop on Carbon Capture and Storage (CCS) that was held in Abu Dhabi on 7-8 September 2011.
In partnership with the Global CCS institute, JGC Corporation, National Institute of Advanced Industrial Science and Technology (AIST) and McKinley Consulting, Quintessa staff in Japan have established and been running a knowledge sharing network a…
In December 2012 Alex Bond gave a five-day training course to scientists from Pakistan on the application of GoldSim to assessing the safety of a near-surface repository for low-level radioactive waste.
A new version of the QPAC Overview Report has been released. QPAC is Quintessa’s general-purpose modelling tool, used within our core consultancy business to address a wide range of problems including those with strongly coupled nonlinear processe…
At the recent British Carbon Group conference “Modelling and Measuring Reactor Core Graphite Properties and Performance” held at Aston University, Birmingham, Quintessa presented two software applications (CHANSELA and PANDA) designed for visualisi…
The AMBER software tool that allows users to build their own deterministic and probabilistic compartment models has undergone a major upgrade, including spatial awareness and 3D visualisation of models.
The closing conference of CO2ReMoVe, an EU project on CO2 storage, was held in Paris on the 29th February. The six-year project has involved over 30 partners from research and industry organisations in Europe and beyond.
Quintessa is providing support to the participation of the Nuclear Decommissioning Authority (NDA) Radioactive Waste Management Directorate (RWMD) in the European Commission (EC) CARBOWASTE project, which is exploring options for the management and…
Michael Egan supported a successful recent IAEA workshop on radioactive waste management held in Amman, Jordan (15-19 July 2012). The aim of the workshop was to provide training and guidance on principles, requirements and best practice in safety…
Quintessa has delivered an updated version to the PRISM food chain modelling software to the UK Food Standards Agency.
A major update of Quintessa's decision support software (TESLA Version 2.1) has been released incorporating a host of new features designed to make it easier to analyse, present and audit decisions.
As a contribution to the European RISCS project, Quintessa has authored a report on scenarios for potential impacts that might be caused by hypothetical carbon dioxide leakage from geological storage facilities.
Quintessa has recently assessed the key controls on performance of a number of different disposal concept options (combinations of wasteform, waste container and backfill) that might be considered for Depleted, Natural and Low Enriched Uranium (DNL…
Quintessa presented papers on modelling iron-bentonite interactions, alteration of bentonite seals in saline groundwaters, and cement-clay reactions at the 5th International Meeting 'Clays in Natural and Engineered Barriers for Radioactive Waste Co…
Quintessa employees are celebrating the first Employee Ownership Day on 4th July 2013.
A new version of the QPAC Overview Report has been released, which describes some of the latest applications of our general-purpose modelling tool QPAC.
Kishan Patel has joined the mathematics and software team at Quintessa's Henley-on-Thames office.
Kate Thatcher has joined Quintessa's Warrington office where she is part of the geosciences team.
Jenny Burrow has joined Quintessa's Henley-on-Thames office, where she is a member of the maths and software team.
Quintessa is supporting the Swedish Radiation Safety Authority (SSM) reveiw of the licence application submitted by the Swedish Nuclear Fuel and Waste Management Company (SKB) for construction of a spent nuclear fuel repository to be located in For…
Kate Thatcher is the lead author on a paper ‘Methane release from warming-induced hydrate dissociation in the West Svalbard continental margin: Timing, rates, and geological controls’ that has been published in the Journal of Geophysical Research.
Quintessa has developed and applied a flexible model for the Nuclear Decommissioning Authority Radioactive Waste Management Directorate (NDA RWMD) to identify the key controls on the thermal performance of the High Level Waste / Spent Fuel (HLW/SF)…
Development of long-term safety arguments concerning the potential for a discrete light non-aqueous phase liquid (LNAPL) to form in disposal vaults, and the subsequent potential impact that might arise in a Geological Disposal Facility containing I…
Quintessa has been awarded two contracts by Finnish Radiation and Nuclear Safety Authority (STUK) to provide expert support for the review and assessment of construction licence application for the Finnish KBS-3 repository for spent nuclear fuel wh…
Quintessa is participating in the international DECOVALEX-2015 project modelling coupled thermal-hydrological-mechanical-chemical (THMC) processes in geological environments.
Awards ceremony for the 2013 Henley Schools Environmental Science Competition sponsored by Quintessa
Version 5.6 of the AMBER compartmental modelling software tool has recently been released.
Quintessa have developed models to assist with the selection of remediation options for sites contaminated by the Fukushima Daiichi accident.
Quintessa is continuing its active participation in the International Atomic Energy Agency’s projects relating to the borehole disposal of disused sealed radioactive sources. Richard Little was an invited expert at the recent IAEA workshop on 'Imp…
Quintessa is supporting the OECD Nuclear Energy Agency in the development of an online database of Features, Events and Processes (FEPs) that are of relevance to the safety of the disposal of radioactive wastes in a geological repository.
Elsevier's journal Energy Procedia has just published papers presented at the 11th International Conference on Greenhouse Gas Technologies (GHGT-11), which was held in Kyoto, Japan, from 18th - 22nd November 2012. Staff from Quintessa authored or…
Quintessa is developing the ACSIS software tool as part of a consortium led by AMEC for NDA RWMD. ACSIS (Atmospheric Corrosion of Stainless Steel in Stores) is designed to be used to improve understanding of the durability of Intermediate Level Was…
Quintessa led a project for NDA RWMD to quantify the amount the amount of voidage in an ILW/LLW Geological Disposal Facility (GDF), and how this is affected by non‑encapsulation of wastes.
Quintessa has become a sponsor of the Henley-on-Thames branch of Cafe Scientifique.
James Penfold participated in the recent IAEA DISPONET meeting on experience that could aid efforts in Japan to deal with large volumes of VLLW resulting from the Fukushima accident.
Laura Limer has rejoined Quintessa's Warrington office after spending 3 years in Shanghai.
Quintessa is currently preparing the release of Version 2.2 of its TESLA decision support software based on Evidence Support Logic. This update will introduce two new features (Confidence Flow Lines and Symmetric Necessity Heuristic) to help visual…
Peter Wood has a DPhil in electrochemistry and extensive nuclear industry experience including: oxidation of nuclear fuel; fission gas release; reactor graphite monitoring; radioactive waste management research strategy: corrosion of stainless stee…
Russell Walke was one of two experts invited to give lectures and support exercise and discussion sessions at an International Atomic Energy Agency regional workshop on the management and safe disposal of radioactive waste for nuclear regulators in…
The RISCS Project has successfully completed a 4-year research programme aimed at improving our understanding of the possible environmental impacts of geological storage of CO2. Key results from the project have been published in 'A Guide to Potent…
Quintessa, working in partnership with Jacobs UK Ltd, provided independent process design and facilitation for a BAT (Best Available Techniques) study to identify the preferred strategy for the treatment and management of redundant oxide fuel flask…
Version 5.7 of the AMBER compartmental modelling software has been released. Many of the developments for AMBER 5.7 focus on facilitating more intuitive exploration of models.
Quintessa sponsored the national secondary schools Team Chess Challenge competition in recognition of the contribution that chess plays in developing strategic thinking skills among young people.
Kishan Patel has been awarded the Hansjoerg Wacker prize by the European Consortium for Mathematics in Industry (ECMI)for the best mathematical dissertation at the Masters level on an industrial project written by a student from an ECMI institution…
Today the ownership of Quintessa has been transferred from employee shareholders to the Quintessa Employee Ownership Trust, which now owns the company on behalf of all employees.
Quintessa has been restructured so that Quintessa Limited KK in Japan is no longer a subsidiary company of Quintessa Limited in the UK.
Quintessa is among the first companies to switch to the new employee-ownership trust (EOT) business model following the more favourable tax treatment introduced in the Finance Act 2014 that received Royal Assent on 17 July 2014. Danny Alexander, Ch…
The Winfrith Nuclear Site was a major part of the UK’s nuclear research capability for several decades. About half of the site has been released for use as a business park. The rest is being decommissioned and will be one of the earliest of the Nuc…
An updated version of Evidence Support Logic: A Guide for TESLA Users has been produced that reflects Quintessa’s improved understanding of the application of Evidence Support Logic (ESL) to complex decisions involving multiple and sometimes confli…
Russell Walke and Laura Limer participated in the Third International Conference on Radioecology and Environmental Radioactivity (ICRER) held in Barcelona between the 7th and 12th of September 2014where a wide range of radiological issues were disc…
Scottish primroses at the Dounreay nuclear site in Scotland have been moved to make way for a new waste disposal facility and are now thriving.
Quintessa has recently invested in a license for COMSOL Multiphysics® and a number of add-on modules. The capabilities of Quintessa's in-house multiphysics code QPAC and COMSOL Multiphysics® provide a broad, robust basis for all aspects of complex…
Quintessa provides support to the operators of the Advanced Gas Cooled Reactors (AGRs) to ensure that it is safe to continue to run the power stations with the observed level of cracking in the graphite bricks.
Louise Parkes, who is studying physics at the University of Birmingham, was an intern at Quintessa in the summer of 2014.
Bryony Hill has joined Quintessa's Henley-on-Thames office, where she is a member of the mathematics and software team specialising in applications of statistical modelling.
Quintessa has participated in a concept selection study for an intermediate store for spent nuclear fuel and other long-lived radioactive waste in Norway.
Quintessa has launched a freely downloadable software application, Portfolio Picker, for selecting an optimal set of options that together satisfy a range of constraints and criteria.
The Radiation and Nuclear Safety Authority in Finland (STUK) has issued a statement that the spent nuclear fuel encapsulation plant and final disposal facility designed by Posiva can be built to be safe. Quintessa has provided expert support to STU…
Alex Bond attended the DFNE-2014 conference, an international conference on Discrete Fracture Network Engineering.
Thomas Williams, who is currently a Bath University placement student working in Quintessa’s Henley office, and another Bath University placement student Graham Cooper recently made it to the final of a new forecasting competition organized by RWE…
Steven Benbow, Kate Thatcher, Claire Watson and James Wilson attended the 6th International Conference on Clays in Natural and Engineered Barriers for Radioactive Waste Confinement in Brussels on the 23rd to 26th of March 2015. The conference was…
James Penfold participated in a four-day trade mission to Romania and Bulgaria organised by UK Trade & Investment (UKTI).
A recent video filmed by a robot inside the Fukushima Daiichi reactor highlights the immense challenge of decommissioning the reactor.
The 41st annual Waste Management Conference (WM2015) was held in Phoenix, USA, 15-19 March 2015. The conference, which is organised by WM Symposia (WMS), concerns the management of radioactive waste and attracted around 2000 participants from arou…
The Nucleus alliance has been awarded 4-year framework contracts that provide contracting routes for the provision of specialist nuclear services to the Nuclear Decommissioning Authority and its Site Licence Companies in addition to a wide range of…
Quintessa recently hosted the biannual meeting for the Long-Term Cement Studies (LCS) project at Leander Club in Henley-on-Thames. This international project is a collaboration between Nagra (Switzerland; the project leaders), JAEA (Japan), Posiva…
Quintessa is participating in the DECOVALEX 2015(DEvelopment of COupled models and their VALidation against EXperiments) research project that is at the forefront of advancing the understanding of coupled thermal-hydrological-mechanical-chemical (T…
The Full Emplacement (FE) experiment is run by Nagra at the Mont Terri underground rock laboratory (URL) in Switzerland. The experiment tests techniques for the emplacement of waste containers and surrounding backfill, and allows study of the respo…
Russell Walke delivered an IAEA supported training course in post-closure safety assessment and the use of AMBER to the Comissão Nacional de Energia Nuclear (CNEN) in Brazil. CNEN is evaluating the IAEA’s generic borehole disposal concept for the…
Successful tests of a the disposal of radioactive sources in boreholes have been completed in Croatia. Quintessa staff have supported this development over the last 14 years, in particular taking the lead in developing a generic post-closure radio…
A study of chemical interactions at the interface between steel and bentonite has been published in Applied Geochemistry. This process is important for the long-term integrity of radioactive waste containers in a geological repository.
Quintessa has launched the first version of the Laplace Transform inversion software (LATIN), which can be freely downloaded from Quintessa’s web site together with a user guide. LATIN is designed to allow both quick inversion of simple one-line tr…
An updated version of Quintessa's free portfolio selection software, Portfolio Picker, has been released containing a number of more advanced features.
The flow of two or more gases through a porous medium is usually modelled using an Advective-Diffusive Model (ADM) which involves the linear addition of the diffusive flux, calculated using Fick’s Law, and the advective flux, calculated using Darcy…
Quintessa has become a COMSOL Certified Consultant reflecting the breadth and depth of our capabilities in the application of COMSOL Multiphysics to model environmental and engineering systems.
Quintessa is pleased to have received a 'Superior Paper' recognition from WM Symposia for the paper on post-closure safety assessment for the Canadian DGR that was presented by Russell Walke at the WM2015 conference in Phoenix in March of this year…
Quintessa has taken the technical lead of a four-year project on safety assessment for radioactive waste disposal in the context of potential climate and landscape evolution to support RWM's contribution to the IAEA's MODARIA programme.
Quintessa has published a paper in the Journal of Radiological Protection in which the most recent information available on the chemical toxicity and biokinetics of uranium is used to propose new standards for limiting intakes of the element and it…
John Hunter, a Quintessa Associate, has recently published a paper on old mines and new sinkholes along the Hucklow Edge vein in Derbyshire. The immediate interest in this event focused on its most likely cause, as a crown hole from the collapse of…
Quintessa and its partners in the Nucleus Alliance will be exhibiting at Nuclear Decommissioning Authority (NDA) Estate Supply Chain Event on Wednesday 4th November at EventCity, Manchester.
Quintessa is pleased to announce that James Kite has joined the Henley-on-Thames office, from the 21st November, 2016.
Preparations are underway for the next phase of the DECOVALEX project; DECOVALEX-2019. Alex Bond of Quintessa will be taking up the role of Technical Secretary from Lanru Jing.
Quintessa, and our partners in the Nucleus Alliance, would like to thank everyone who visited our stands at the recent NDA Estate Supply Chain Event.
Sellafield have awarded Quintessa a place on its Enabling Innovation Framework (EIF). This new framework builds on the very successful pilot EIF. It involves companies working as a single integrated team, to provide a unique range of services acros…
David Hodgkinson has been awarded the Employee Owner of the Year Award by the BBC’s Martine Croxall at this year’s UK Employee Ownership Awards. This award celebrates an individual, irrespective of seniority who has done the most to promote and dev…
On 25th November, the UK Government’s Department of Energy and Climate Change (DECC) announced to the London Stock Exchange that, following the Chancellor's Autumn Statement, the £1 billion ring-fenced capital budget for the Carbon Capture and Stor…
James Penfold has been appointed as a director of Quintessa Limited with special responsibility for coordinating business development across the company.
Quintessa is pleased to announce that Alex Bond was elected as a Chartered Scientist (CSci) and Chartered Geologist (CGeol) of the Geological Society on November 25th 2015.
Richard Metcalfe and George Towler participated in a recent International Energy Agency (IEA) Greenhouse Gas R&D Programme (IAEGHG) Risk Management Network and Environmental Research Network combined meeting.Mervyn Wright of National Grid Carbon (N…
Quintessa carried out a risk assessment for AkzoNobel of the disposal of residual materials from a waste-to-energy plant operated by Twence B.V., in redundant salt caverns in the Netherlands.
Richard Little has been appointed as Managing Director of Quintessa succeeding David Hodgkinson who becomes part-time Chairman.
As reported by the BBC on November 19 2015, as part of a routine inspection at the Hunterston B power station in Ayrshire, cracks were discovered in the graphite bricks which make up the core of one of two nuclear reactors. Similar cracks were foun…
Quintessa is very pleased to announce that the latest version of AMBER spatial awareness and 3D visualisation.
Quintessa has achieved the prestigious Investors in People (IiP) accreditation. IiP is the UK’s leading people management standard and helps organisations improve business performance through their employees.
Quintessa has developed LoTAS (Load Trace Analysis Software) for EDF Energy to help manage and analyse the fuel grab load traces that are recorded whenever a fuel assembly in an Advanced Gas-cooled Reactor (AGR) is raised or lowered.
The Unity2 team led by NSG Environmental has been awarded a framework contract from thje Nuclear Decommissioning Authority (NDA) for Lot B of their Direct Research Portfolio covering research and development needs that arise from some of the most…
Richard Metcalfe participated in the final meeting of the EC-supported project “Full-Scale Demonstration Of Plugs And Seals” (DOPAS), which was organised by a Posiva-led consortium in Turku, Finland from the 24th-27th May 2016.
Quintessa has recently published two papers which use numerical modelling to analyse data from the SEALEX experiments, run by IRSN at the Tournemire Underground Research Laboratory (URL), which contribute to understanding the processes observed.
Quintessa has produced a study on the implications of voidage for post-closure safety of a Geological Disposal Facility for Radioactive Waste Management Limited.
Quintessa's risk assessment of the proposed White Rose carbon capture and storage project was highlighted in a recent report from the Carbon Capture and Storage Association on lessons from UK CCS programmes
Quintessa is participating in the international DECOVALEX 2019 research project aimed at advancing the understanding and modelling of coupled thermal-hydrological-mechanical-chemical-gas (THMCG) processes in support of the safe geological disposal…
Quintessa has been working with Wave-Tricity Ltd to help to analyse and optimise their unique Wave Energy Converter design
The Greenhouse Gas Control Technologies (GHGT) conference series has established itself as the principal international conference on greenhouse gas mitigation technologies especially on CCS (CO2 Capture and Storage). GHGT-13 will be held in Lausan…
IAEA publish the EMRAS II working group 3 report on environmental change in post-closure safety assessment of solid radioactive waste repositories. IAEA-TECDOC-1799
Quintessa is pleased to announce that Dr Simon Rookyard has joined its Warrington office from 8th September.
Quintessa has just launched an update to the design of its website.
Quintessa is part of the technical support team to the latest BIOPROTA project relating to improving understanding and modelling of C-14 in the biosphere. This project is centred on model-data and model-model comparisons based on three experimental…
Quintessa is very pleased to announce that the latest version of AMBER was released to existing customers with software maintenance agreements in September 2016.
Quintessa supported the Nucleus stand at the NDA Estate Supply Chain Event in November 2016.
In November 2016, Quintessa attended the 13th Conference on Greenhouse Gas Control Technologies (GHGT-13), in Lausanne, Switzerland.
The Swedish Radiation Safety Authority (SSM) has received an application for the expansion of SKB’s final repository for low and intermediate level waste at Forsmark (SFR).
A team from AECOM and Quintessa have recently worked with Sellafield Ltd to review CLESA’s Post-Closure Radiological Safety Assessment (PCRSA), to support ongoing permitting of the facility.
On 3rd and 4th May Quintessa staff held a meeting covering company strategy, staff wellbeing, socialising and having fun, in the environs of New Hall Hotel in Sutton Coldfield, Birmingham.
David Hodgkinson, Quintessa’s founder and first Managing Director, has decided to retire after a long and illustrious career in the nuclear industry spanning 45 years.
The BIOPROTA annual meeting was held 8-9 May, 2017, hosted by the Swiss Federal Nuclear Safety Inspectorate (ENSI) in Brugg, Switzerland. The meeting was organised by the BIOPROTA technical secretariat, provided by Quintessa and RadEcol, and was a…
A major update of Quintessa's free Graph Grabber tool, which allows users to extract data points from a graph image, has been released.
Quintessa has recently updated its software tools for the visualisation of QPAC output data.
Rebecca Newson rejoins Quintessa
Quintessa is Recruiting
Mathilde Santucci’s Summer Internship at Quintessa
Laura Limer and Russell Walke participated in the 4th International Conference on Radioecology and Environmental Radioactivity ICRER
University students Ben McMahon and Matt Foster start their placement year at Quintessa
Quintessa is pleased to announce that AMBER 6.2 has been released to existing customers with software maintenance agreements.
Quintessa is playing a leading role in the EURATOM Horizon2020 project "Beacon: Bentonite Mechanical Evolution". The Initial Workshop for this project was hosted by the Lithuanian Energy Institute in Kaunas, Lithuania, in June 2017.
Quintessa attended a conference Sharing an Uncertain World: Lessons in Managing Risk at the Geological Society, Burlington House. The meeting was one in a series for the Year of Risk.
The Nucleus Alliance will be attending the NDA Estate Supply Chain Event on Thursday 2nd November at EventCity, Manchester.
Sellafield Limited launched a number of new supply chain initiatives at its Director’s Forum at Energus in Workington.
Expert Mission to Slovakia. Part of IAEA’s mission is to support knowledge sharing and training activities relating to all aspects of work with radiation.
Quintessa is pleased to announce that Patricia Verrier has joined its Henley-on-Thames office on 20th November 2017.
Quintessa are supporting an exciting new PhD research project at the University of Edinburgh, continuing our close cooperation with Chris McDermott and Fiona Todd
In October 2017, the IAEA held the first Technical Meeting for their new forum on the Safety of Near Surface Disposal in Vienna.
In November 2017, the Swedish Radiation Safety Authority (SSM) published a series of reports associated with the main phase of the review of SKB’s assessment (SR-PSU) of the long-term safety for the expansion of the final repository for low and int…
Quintessa is recruiting. Due to our continued success in winning work in the areas of radioactive waste management and nuclear site restoration, a permanent position has arisen for an experience scientific consultant who would be capable of acting…
The modelling of cementitious engineered barriers is an important process to consider when modelling the stability and safety of geological repositories for nuclear waste. Quintessa has carried out a range of modelling studies on the behaviour of…
Quintessa has been supporting the Swedish regulatory review process for over a decade, using AMBER and QPAC for supporting calculations.
Quintessa participated in the recently completed DECOVALEX-2011 project, which was the fifth round of an international co-operative research programme for geological radioactive waste disposal, specifically considering the DEvelopment of COupled mo…
Quintessa staff have helped Dounreay to develop the site restoration strategy, and have assisted the site in refining the plans, primarily focusing on optimising the management of waste and contaminated land, and evaluating the long-term safety of…
Quintessa has been awarded a contract under EuropeAid's PHARE programme to produce a preliminary safety analysis report (PSAR) for the Baita Bihor low-level radioactive waste repository in Romania.
Quintessa successfully completed a contract under EuropeAid's PHARE programme to improve the characterisation of radioactive waste at Cernavoda nuclear power plant (NPP) in Romania.
As part of the EC CO2GeoNet programme of work on the geological storage of carbon dioxide, Quintessa staff, working with colleagues from the British Geological Survey, applied system-level models to the volcanic Latera region in the north of Rome.
Quintessa participated in the EC NF-PRO project with financial support from the EC and Nirex. NF-PRO was concerned with the understanding and numerical modelling of key processes in the near-field of high-level waste (HLW) and spent fuel (SF) geolo…
Quintessa collaborated with the British Geological Survey (BGS) in undertaking a project for the Health and Safety Executive (HSE) to examine the potential for leakage of natural gas from Underground Gas Storage (UGS) in salt caverns and depleted o…
Quintessa staff played a key role in the review of the SR-Can safety assessment for the regulatory authorities for nuclear waste management in Sweden, SKI and SSI. In addition Quintessa has provided support to SKI through independent assessment ca…
Quintessa has developed system descriptions for a range of generic geological environments that will form an input for the post-closure component of the Disposal System Safety Case (DSSC) being developed by the NDA Radioactive Waste Management Dire…
Quintessa carried out a project for CH2M Hill Hanford Group to explore the potential use of Evidence Support Logic (ESL) to assess confidence in key long-term safety issues for in-situ disposals of waste residues and contaminated land from former o…
Quintessa supported Dounreay Site Restoration Ltd (DSRL) by evaluating the long-term safety of the Shaft between 2003 and 2009. This has included developing and updating a Post-Closure Environmental Safety Case (PCESC) for the facility.
Quintessa has been providing support to an International Atomic Energy Agency (IAEA) initiative to develop and implement a safe and secure borehole disposal route for disused sealed source wastes, which many countries have from medical and industri…
Quintessa is participating in The Long-Term Cement Studies (LCS) project, which is an international collaboration aimed at increasing the understanding of these high-pH cement interaction effects in the repository near-field and the geosphere. Quin…
Quintessa and its subcontractors, Geofirma Engineering and SENES Consultants, have completed the postclosure safety assessment of Ontario Power Generation's proposed Deep Geologic Repository (DGR) for Low and Intermediate Level Waste at the Bruce n…
Quintessa contributed to the modelling of coupled thermo, hydro and mechanical (THM) processes in the bentonite buffer that is used in several designs for deep radioactive waste repositories using software based on Quintessa's QPAC general-purpose…
Over the past eight years, Quintessa has carried out research and development in support of EDF Energy (and formerly British Energy) for the continued safe operation of Advanced Gas Cooled Reactors (AGRs). A critical part of the AGR safety case is…
QPAC is being used to model the performance of CO2 geological storage at the systems level.
Quintessa participated in the CO2ReMoVe project, which has investigated the long-term reliability and safety of geological CO2 storage and supported the development of guidelines for site certification in addition to providing support to policy mak…
Quintessa is participating in RISCS (Research into Impacts and Safety in CO2 Storage), which is a 4-year EC and industry project that aims to improve understanding of the potential environmental impacts of geological storage of CO2, in the unlikely…
Quintessa has provided a structured online FEP database for geological storage of CO2 and this currently has over 1000 registered users throughout the world. The database can be accessed through the web site of the International Energy Agency Green…
Quintessa develops and supports the PRISM software package, which provides the UK Food Standards Agency (FSA) with a capability for modelling radionuclide behaviour in agricultural foodchains following deposition resulting from routine and accident…
Over four years, Quintessa has been advising the Japan Atomic Power Company (JAPC) on its strategy for decommissioning the Tokai 1 nuclear power plant.
The UK plans of safely disposing of its higher activity radioactive wastes deep underground in a geological disposal facility. Radioactive Waste Management Limited (RWM) is responsible for taking these plans forward, including demonstrating the lo…
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Contact Details for Quintessa - The Scientific and Mathematical Consultancy
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Quintessa recruits talented scientists and mathematicians with strong communication skills to support clients in solving complex technical problems.
Quintessa is an employee-owned company whose staff are highly qualified and experienced in providing quantitative support to major scientifically-based decisions.
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Clients of Quintessa - The Scientific and Mathematical Consultancy
Quintessa forms partnerships with large and small companies, universities and research institutes to provide clients with the best team for the job.
In addition to our permanent staff Quintessa has a network of highly experienced associates, many of whom have national and international reputations in their chosen fields.
Unless otherwise expressly stated, all original material of whatever nature created by Quintessa Limited and included in this website (https://www.quintessa.org/) is subject to the copyright of Quintessa Limited. Nothing contained in these terms an…
Innovative mathematically-based solutions to complex technical issues including statistical modelling, mathematical modelling, analytics, operational research, uncertainty analysis and sensitivity analysis.
Applied research publications relating to strategic and environmental issues arising from nuclear and carbon-based power generation.
Quintessa Limited is proud to be an employee-owned company
Read about Quintessa's charitable donations policy, including a list of the charities we have donated to in the last year.
Quintessa's work is accredited by leading business management organisations.
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