Abstract
The paper reviews UK studies of fast reactor containment response under hypothetical core disruptive accident (HCDA) loading, describing the evolution of complementary programmes of model experiments, numerical methods development and code validation. Results are presented from studies of the CDFR primary vessel, roof and core support structure, with particular emphasis on recent experimental work: these examples illustrate the level of detail required in the assessment of containment structures. The status of the work is critically reviewed, drawing attention to problems associated with the extrapolation of data from model experiments to the reactor situation. The likely direction of future work is indicated, focussing on more detailed assessment of particular structural features, the performance of seals and the study of leakage.
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