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          NRC Library  Document Collections  NUREG-Series Publications  Publications Prepared by NRC ContractorsA Methodology for Analyzing Precursors to Earthquake-Initiated and Fire-Initiated Accident Sequences (NUREG/CR-6544)

On this page: Publication Information AbstractDownload complete document NUREG/CR-6544 (PDF - 7.38 MB)Publication Information **Manuscript Completed:**March 1998**Date Published:**April 1998 **Prepared by:** R.J. Budnitz, H.E. Lambert Future Resources Associates, Inc. 2039 Shattuck Avenue, Suite 402 Berkeley, California 94704-1150 G.Apostolakis, J.K. Salas Massachusetts Institute of Technology Cambridge, Massachusetts 02139-4307 J-S. Wu Advanced System Concepts Associates Rolling Hills Estates, California 90274 M.K. Ravindra EQE International, Inc. Newport Beach, California 92660-2037 H.J. VanderMolen, NRC Project Manager **Prepared for:** Division of Systems Technology Office of Nuclear Regulatory Research U.S. Nuclear Regulatory Commission****Washington, DC 20555-0001 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. 
      
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