Post-Test Analysis of an Integral Effect Reflood Test for an APR1400 Large-Break LOCA Scenario

Post-test analysis was performed on an integral effect reflood test, the ATLAS Test No. 9, for an APR1400 Large-Break LOCA (LBLOCA) scenario by using the MARS code. Integral effect tests on the reflood period of a large break LOCA were performed by using the ATLAS facility to help understand the thermal-hydraulic phenomena during the reflood period of a large-break LOCA for APR1400 and for resolving the current safety issues for the APR1400 licensing on the downcomer boiling phenomenon. The present ATLAS Test No. 9 is one of the integral effect reflood tests for investigating the thermal-hydraulic characteristics during an entire reflood period to provide reliable data to help validate the LBLOCA analysis methodology for APR1400.