Enhancements to PWR SAMG since Fukushima

Plant specific Severe Accident Management Guidelines are provided to give guidance plant staff respond a severe accident, protect containment, minimise fission product releases and prioritise equipment recovery efforts while bringing the controlled stable condition. This paper presents discusses enhancements that have been made particularly widely implemented SAMG based on Westinghouse Owners Group generic model (now part of PWR Group) since Fukushima accident. Although U.S. European responses accident may seem at first sight be different, in fact, needed order address lessons learned were quite consistent. How deal with loss d.c. power / or instrumentation, long term a.c. (much longer than had previously considered), multiple unit accidents, accidents fuel pool, from shutdown initial conditions other issues occurred during event which we must learn from? results number projects aimed providing these issues, some originating Europe. Main addressing described. The also summarises describes an ongoing project develop fully revised specifically applicable plants Europe (and designs, such as VVER) benefits all will provide single integrated updated basis for mitigation systems typical (often different US) update their SAMG.