Analysis of Core Damage Frequency: Surry Power Station, Unit 1: External Events (Vol. 3, Rev. 1, Part 3)

Technical Report · Fri Nov 30 23:00:00 EST 1990

DOI:https://doi.org/10.2172/6340434· OSTI ID:6340434

Bohn, M. P. ^[1]; Lambright, J. A. ^[1]; Daniel, S. L. ^[1]; Johnson, J. J. ^[2]; Ravindra, M. K. ^[2]; Hashimoto, P. O. ^[2]; Mraz, M. J. ^[2]; Tong, W. H. ^[3]

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1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
2. EQE, Inc., San Francisco, CA (United States)
3. EQE, Inc., San Francisco, CA (USA)

This report presents the analysis of external events (earthquakes, fires, floods, etc.) performed for the Surry Power Station as part of the USNRC-sponsored NUREG-1150 program. Both the internal and external events analyses make full use of recent insights and developments in risk assessment methods. In addition, the external event analyses make use of newly-developed simplified methods. As a first step, a screening analysis was performed which showed that all external events were negligible except for fires and seismic events. Subsequent detailed analysis of fires resulted in a total (mean) core damage frequency of 1.13E-5 per year. The seismic analysis resulted in a total (mean) core damage frequency of 1.16E-4 per year using hazard curves developed by Lawrence Livermore National Laboratory and 2.50E-5 per year using hazard curves developed by the Electric Power Research Institute. Uncertainty analyses were performed, and dominant components and sources of uncertainty were identified.

• Research Organization: US Nuclear Regulatory Commission (NRC), Washington, DC (United States). Office of Nuclear Regulatory Research; Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States); EQE, Inc., San Francisco, CA (United States)
• Sponsoring Organization: USNRC; USDOE
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6340434
• Report Number(s): NUREG/CR--4550-Vol.3-Rev.1-Pt.3; SAND--86-2084-Vol.3-Rev.1-Pt.3; ON: TI91006719
• Country of Publication: United States
• Language: English

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