女川原子力発電所第２号機 原子炉格納容器過圧破損防止対策の概要
Summary of prevention from overpressurization damage of containment vessel in Onagawa NPS unit-2
著者:
菊池 琢 吉川 祐明 久保 亮介 （東北電力）
発刊日:
公開日:
Alternate residual heat removal system (ARHR)Control area boundaryFiltered containment venting system (FCVS)Severe accident countermeasuresWall penetration
概要
Among the severe accident countermeasure works of Onagawa NPS unit-2, it is one of the characteristics to install filtered containment venting system (FCVS) facilities in the existing reactor building. Therefore, various considerations are taken about bringing in facilities, installing of facilities and future maintenance management. Most of the severe accident countermeasure works are laying of the piping or cable way, and therefore it is necessary to set penetrations in the building. Particularly, penetrations set through the control area boundaries are confirmed carefully, and are carried out. As further measures, alternate residual heat removal system (ARHR) is installed to add to the thickness of prevention from overpressurization damage of containment vessel. Diversity and independency are considered for each measure.
