Search - Number 13 - PROBABILISTIC ESTIMATIONS HOW QUALIFICATION OF FAST-ACTING REDUCING VALVES OF VVER 1000/B-320 AFFECTS SAFETY AT BIPHASIC MODES AND “SEVERE” CONDITIONS

PROBABILISTIC ESTIMATIONS HOW QUALIFICATION OF FAST-ACTING REDUCING VALVES OF VVER 1000/B-320 AFFECTS SAFETY AT BIPHASIC MODES AND “SEVERE” CONDITIONS
Cover not present PROBABILISTIC ESTIMATIONS HOW QUALIFICATION OF FAST-ACTING REDUCING VALVES OF VVER 1000/B-320 AFFECTS SAFETY AT BIPHASIC MODES AND “SEVERE” CONDITIONS
Category: Number 13
Publication: 13
Summary

Based on the known results of probabilistic safety analysis of NPP power units with the reactors VVER 1000/B-320 the article determines the probabilistic estimations of change of general safety factors as a result of assigning qualification for safety relief valves of Zaporizhzhya NPP at the outflow of water-steam medium and "severe" conditions of  operation.
Keywords: safety relief valve, water-moderated reactor (VVER), probabilistic safety analysis (PSA), beyond design based accident, design based accident, intercontour leakage, steam generator, qualification, "severe" conditions, biphasic mode, core damage frequency (CDF).