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UNITED STATES NUCLEAR REGULATORY COMMISSION o
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WASHINGTON, D. C. 20656 F
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IIAR 201985 MEMORANDUll FOR:
James P. Knight, Acting Director Division of Engineering
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i Robert J. Bosnak, Acting Assistant Director for Components & Structures Engineering Division of Engineering FROM:
Stephan J. Brocoum, Acting Chief Geosciences Branch Division of Engineering
SUBJECT:
PROPOSED REVIEW PLAN FOR PG&E LONG TERM SEISMIC PROGRAM As required by the seismic license condition in the Diablo Canyon Unit 1 Full Power License DPR-80, PG&E, by letter dated January 30, 1985, submitted their program plan (Long Term Seismic Program) for the seismic reevaluation for NRC staff approval before proceeding with their program.
As the requirements of this seismic license condition include studies that involve the technical expertise in several disciplines, it is recommended that a Division of Engineering review group be formed to review the Diablo Canyon program plan, interact with PG&E during the 3 year execution and implementation of the program, and review the final report upon the completion of the program. The success of the program will depend, in part, on NRC's parallel program and staff's interaction with PG&E during the course of the program.
The review group for the Long Term Seismic Program most likely will require participation from the Division of Engineering, and its consultants. Assistance from other Divisions may be required for the review of some elements of the license condition. Some members will be needed continuously, and would form the core of the review group. Other members may only be needed occasionally, or depending on the results of tectonics and seismology inputs, not be needed at all. Appendix A shows a suggested make up of the review group with major review responsibilities indicated.
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MAR 20 W With regard to schedule, it is suggested that we interact with PG&E to help them develop a program plan which the staff can approve for the three year program as soon as possible with a target date July 31, 1985. The final report on the results of the program would then be submitted by PG&E on or before July 31, 1988. A suggested schedule for review of PG&E progrca plan is included as Appendix B.
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y Stephan J. Brocoum, Acting Chief Geosciences Branch Division of Engineering cc:
R. Bosnak G. Lear F. Cherny R. LaGrange A. Thadani P. T. Kuo H. Polk R. McMullen R. Rothman H. Schierling
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Appendix A SUGGESTED MEMBERS OF REVIEW GROUP FOR DIABLO CANYON LONG TERM SEISMIC PROGRAM Stephan Brocoum, Leon Reiter: Technical Review Group Leaders Hans Schierling: Diablo Canyon Project Manager R. McMullen, Stephan Brocoum: Geology, Tectonics, Earthquake Magnitude, Seismic Hazard Analysis R. Rothman, L. Reiter: Tectonics, Earthquake Magnitude, Groundmotion, Soil-Structure Interaction, Seismic Hazard Analysis, Probabilistic Risk Assessment P. T. Kuo, H. Polk: Soil Structure Interaction, Structural Analysis (Probabilistic Risk Analyst): Seismic Hazard Analysis, Probabilistic Risk Assessment MEMBERS NEEDED OCCASIONALLY (Mechanical Engineers, Equipment Qualification Engineers): Fragility Analysis CONSULTANTS FOR THE STAFF:
Dr. David B. Slemmons: Geology, Tectonics, Earthquake Magnitude, Seismic Hazard Analysis U. S. Geological Survey: Geology, Tectonics, Ground Motion, Seismic Hazard Analysis LLL Sponsored Panel: Ground Motion by Numerical Analysis Brookhaven Sponsored Panel: Soil-Structure Interaction Brookhaven(?): Probabilistic Risk Assessment
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i Appendix B 1
SUGGESTED REVIEW SCHEDULE FOR STAFF APPROVAL OF DIABLO CANYON PROGRAM PLAN FOR THE SEISMIC CONDITION By March 15, 1985 Diablo Canyon Review Group in Place March 21, 1985: Staff Presents Management Overview to ACRS Subcommittee in Los Angeles 4
April 1,1985: Initial Individual Reviewer Preliminary Coments to Group Leaders on PG&E Program Plan April 15, 1985 Draft Staff Comments on PG&E Program Plan to Review Group Leaders May 1,1985 Meeting Between PG&E and Staff to Discuss Staff Connents on Program Plan (if necessary)
May 15, 1985: Final Staff Coments to Group Leaders June 1, 1985: Staff Submits Written Coments and Requests for Information to PG8E on Program Plan July 1, 1985: PG&E Submits Revisions to Program Plan Incorporating Staff Comments July 15, 1985: Staff Presents Its Recommendations on PG&E's Program Plan i
to ACRS July 31, 1985: Staff (through DL) Formally approves PG&E's Program Plan i
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