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A Methodology for Analyzing Precursors to Earthquake-Initiated and Fire-Initiated Accident Sequences (NUREG/CR-6444)

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Publication Information
Abstract

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NUREG/CR-6444 (PDF - 7.38 MB)

Publication Information

Manuscript Completed: March 1998
Date Published: April 1998

Prepared by
R.J. Budnitz, H.E. Lambert, G.Apostolakis,
J.K. Salas, J-S Wu, M.K. Ravindra

Future Resources Associates, Inc.
2039 Shattuck Avenue, Suite 402
Berkeley, CA 94704-1150

Massachusetts Institute of Technology
Cambridge, MA 02139-4307

Advanced System Concepts Associates
Rolling Hills Estates, CA 90274

EQE International, Inc.
Newport Beach, CA 92660-2037

H.J. VanderMolen, NRC Project Manager

Prepared for
Division of Systems Technology
Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
NRC Job Code W6555

Availability Notice

Abstract

This report covers work to develop a methodology for analyzing precursors to both earthquake-initiated and internal fire-initiated accidents at commercial nuclear power plants. Currently, the U.S. Nuclear Regulatory Commission sponsors a large ongoing project, the Accident Sequence Precursor project, to analyze the safety significance of other types of accident precursors, such as those arising from internally-initiated transients and pipe breaks, but earthquakes and fires are not within the current scope. The results of this project are that (i) an overall step-by-step methodology has been developed for precursors to both fire-initiated and seismic-initiated potential accidents; (ii) some stylized case-study examples are provided to demonstrate how the fully-developed methodology works in practice, and (iii) a generic seismic-fragility data base for equipment is provided for use in seismic-precursor analyses.