Evolution of PRA methodology and insights since WASH-1400

Conference · Wed Jan 01 04:00:00 EST 1986

OSTI ID:5291083

Harper, F T; Camp, A L

The Nuclear Regulatory Commission (NRC) is preparing NUREG-1150 to examine the current perception of risk from a selected group of nuclear power plants. In support of NUREG-1150, Sandia National Laboratories has directed the production of Level 1 Probabilistic Risk Assessments (PRAs) for the Surry, Sequoyah, Peach Bottom, and Grand Gulf nuclear power plants - additional studies are planned. The first four plants have been studied previously in either WASH-1400 or RSSMAP. The more recent studies suggest significant changes in our perception of dominant accident sequences. In this paper we will examine the changes in our perception of the likelihood of severe core damage accidents, in terms of both changes in PRA methodology and changes to the plants as a result of evolving regulations.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5291083
• Report Number(s): SAND-86-1570C; CONF-861102-8; ON: TI86012847
• Country of Publication: United States
• Language: English

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