Analysis of structural response of Monju reactor vessel under HCDAs using PISCES-2DELK code (III); Validation study of analytical method

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The validation study of the PISCES-2DELK code and a crushable model developed to analyze to the effects of the thermal shield layer under the plug head on the structural response of the prototype reactor vessel were performed by using the shock structural experimental results of 1/33- and 1/15-scale models of prototype reactor vessel. Because the hardening effect of the structures due to higher strain rate is important in the analysis of the scale model experiments, two hardening correlations based on different experimental data were used for the present study. As the results of the present study, it is concluded that (1)PISCES-2DELK code is capable of predicting well the results of the shock structural scale-model experiments, and (2)the cushable model developed to analyze the effects of the thermal shield layer under the plug head is reasonable. By incorporating the crushable madel into PISCES-2DEIK, the overall shock structural response of the reactor vessel is able to be analyzed by the PISCES-2DELK code, including the crushable effects of the thermal shield layer under the plug head.