Understanding and modelling fuel behaviour under irradiation

G. Rossiter,     National Nuclear Laboratory (NNL), UK


It is essential to ensure that nuclear fuel operates within its design constraints, and therefore safely. This requires an understanding of the fuel behaviour under irradiation. The behaviour is complicated by the effects of the neutron flux, fissioning and fission product generation, and microstructural changes in the fuel as irradiation proceeds. Although there are many differences between the behaviour of different fuel types, there are also many commonalities. This chapter describes: (i) the important phenomena that occur under irradiation; how and why the phenomena are modelled using computer codes; and the ...

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