Materials used in nuclear reactors need to maintain their integrity for decades in a harsh environment including intense radiation fluxes and high temperatures.

Quintessa has carried out extensive mathematical and statistical modelling of the graphite cores of Advanced Gas Cooled Reactors (AGRs) in support of safety cases for their continued operation.

Quintessa has also investigated the possible behaviour of graphite wastes, especially the behaviour of irradiated graphite wastes in a Geological Disposal Facility (GDF) and how the performance of a GDF would be influenced by alternative disposal options and uncertainties in process understanding and parameterisation.