Results of Researches in the Frame Work of the Project “OECD PSB-VVER”

Under OECD PSB-VVER project, five experiments were performed in the PSB-VVER test facility. They are: 11% upper plenum break, natural circulation test, small break in cold leg, leak from primary circuit into secondary one and large break in cold leg. The experimental program purposes to cover the conditions that are highly relevant to the code validation related to PWR in general and to VVER-1000 safety assessments in particular. Main results of the OECD PSB-VVER project are presented in the paper.