ECCS strainer for Hamaoka NPP employs cassette type. At the time of severe accident, it is necessary to take into consideration the chemical debris which has not been considered in BWR so far, in order to carry out pH control in the reactor containment vessel. In this paper, we report the results of closed vertical pipe loop test on the evaluation of the ECCS strainer head loss when considering the chemical debris in addition to the debris such as coating generated at the time of severe accident....
英字タイトル:
Evaluation of ECCS strainer head loss caused by debris generated at the time of severe accidents.

Fact finding survey of actual reactor pressure vessel in decommissioning Hamaoka nuclear power station has been conducted. All boat samples was already transported to a domestic post irradiation examination (PIE) facility. During the PIE, un-irradiated archive materials was also investigated for better understanding of cladding HAZ in base metal, as introduced in the 14th JSM conference. This is the progress report describing some new results obtained after the conference....
英字タイトル:
Research on reactor pressure vessel in Hamaoka Unit 1 - Material research utilizing decommissioning NPS -