Loss of offsite power accident analysis in a VVER-1000/V446 nuclear power plant

Abstract

The aim of this study is to present a thermo-hydraulic analysis of the loss of offsite power ac ci-dent in VVER-1000/V446 nu clear power plant using the RELAP5 code. Loss of offsite power ac ci dent would lead to the un avail ability of major active safety systems, and that the safety criteria ensuring a se cure operation of the nu clear power plant would be violated, resulting in core heat-up with possible core degradation. Therefore, the analysis and investigation of the plant, during this ac ci dent, is very important. For this purpose, different behaviors of major components in the primary and the secondary sides of the re ac tor cool ant system are studied. In this pa per, the re ac tor is simulated by using RELAP5 system code. The results show a rea son able agreement with the developed model and also with the Bushehr nuclear power plant final safety analysis reports.