Low-power and shutdown models for the accident sequence precursor (ASP) program

Conference · Sat Feb 01 04:00:00 EST 1997

OSTI ID:467928

Sattison, M B; Thatcher, T A; Knudsen, J K ^[1]

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1. Idaho National Engineering Lab., Idaho Falls, ID (United States); and others

The US Nuclear Regulatory Commission (NRC) has been using full-power. Level 1, limited-scope risk models for the Accident Sequence Precursor (ASP) program for over fifteen years. These models have evolved and matured over the years, as have probabilistic risk assessment (PRA) and computer technologies. Significant upgrading activities have been undertaken over the past three years, with involvement from the Offices of Nuclear Reactor Regulation (NRR), Analysis and Evaluation of Operational Data (AEOD), and Nuclear Regulatory Research (RES), and several national laboratories. Part of these activities was an RES-sponsored feasibility study investigating the ability to extend the ASP models to include contributors to core damage from events initiated with the reactor at low power or shutdown (LP/SD), both internal events and external events. This paper presents only the LP/SD internal event modeling efforts.

• Research Organization: Nuclear Regulatory Commission, Washington, DC (United States). Office of Nuclear Regulatory Research; Brookhaven National Lab., Upton, NY (United States)
• OSTI ID: 467928
• Report Number(s): NUREG/CP--0157-Vol.3; CONF-9610202--Vol.3; ON: TI97004275
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
22 GENERAL STUDIES OF NUCLEAR REACTORS
PROBABILISTIC ESTIMATION
REACTOR SAFETY
REACTOR SHUTDOWN
RISK ASSESSMENT
SAFETY ANALYSIS
SIMULATION