Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf
VVER-1000 RPV lower head model related to late in-vessel phenomena in case of hypothetical severe accident
Gencheva, R.; Grudev, P.; Stefanova, A.; Jobst, M.; Wilhelm, P.
This work discusses the progress in the development of an ASTEC computational model for investigation of molten corium pool behaviour in the lower head of a VVER-1000 reactor in case of a hypothetical accident with core degradation. The model was tested with variation of characterizing parameters which could have an influence on the molten pool behaviour and respectively the response behaviour of the reactor pressure vessel wall. An accident scenario with external cooling of the RPV wall was analysed. The preliminary code results give an estimation of the thermal load on the RPV wall. The sensitivity of the model depending on RPV wall nodalization was investigated. The analysis is performed in support to the numerical investigations realized within the frames of the EU HORIZON 2020 IVMR project (grant agreement number 662157).
Keywords: VVER-1000; severe accident; RPV; lower head; in-vessel
Contribution to proceedings
27th Symposium of AER on VVER Reactor Physics and Reactor Safety, 17.-20.10.2017, München, Deutschland, 205-213
27th Symposium of AER on VVER Reactor Physics and Reactor Safety, 17.-20.10.2017, München, Deutschland