Palo Verde 発電所と Diablo Canyon 発電所の FLEX 機器に関する事例調査
Survey of Palo Verde Nuclear Power Plant and Diablo Canyon Nuclear Power Plant
著者:
大久保 友輝夫 Yukio OHKUBO
発刊日:
公開日:
beyond design basisFLEXflexible mitigation strategy
概要
One of the primary lessons learned from the accident at Fukushima Dai-ichi was the significance of the challenge presented by a loss of safety related systems following the occurrence of a beyond-design-basis external event. In the case of Fukushima Dai-ichi, the extended loss of alternating current power (ELAP) condition caused by the tsunami led to loss of core cooling and a significant challenge to containment. NRC and NEI made an approach for adding diverse and flexible mitigation strategies-or FLEX- that will increase defense-in-depth for beyond design basisbeyond-design-basis scenarios to address an ELAP and loss of normal access to the ultimate heat sink (LUHS) occurring simultaneously at all units on a site. We visit to Palo Verde Nuclear Power Plant and Diablo Canyon Nuclear Power Plant so that we learn FLEX strategy in US.
