ML20209E546

Forwards Util Responses to NRC Comments on long-term Seismic Program Plan & NRC Responses to ACRS Question on Suitability of Level 1 PRA in Seismic Reevaluation Program

ML20209E546
Person / Time
Site:	05000000, Diablo Canyon
Issue date:	06/19/1985
From:	Bosnak R Office of Nuclear Reactor Regulation
To:	Novak T Office of Nuclear Reactor Regulation
Shared Package
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References
FOIA-86-391 NUDOCS 8507020160
Download: ML20209E546 (1)

Text

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JUN 1911B5 MEMORANDUM FOR:

Thomas M. Novak, Assistant Director for Licensing Division of Licensi s FROM:

Robert J. Bosnak, Acting Assi'stant Director for Components & Structures Engineering Division of Engineering

SUBJECT:

RESPONSES TO ACRS QUESTION ON SUITABILITY OF LEVEL 1 PRA IN THE DIABLO CANYON.S EISMIC REEVALUATION PROGRAM The ACRS has asked the NRC staff and PG&E to address the suitability of performing a Level 1 probabilistic risk assessment (PRA) rather than a Level 2 PRA in the Diablo Canyon seismic reevaluation program. is a letter from James D. Shifter to Harold R. Denton (PG&E Letter No: DC-85-210) containing PG&E responses to NRC staff coments on the Diablo Canyon Long Tenn Seismic Program Plan. On page 29 of those responses is the PG&E justification for limiting the PRA to a Level 1 assessment. is the staff's response to the ACRS's request. This response was prepared by members of the Reliability and Risk Assessment Branch, DST and the Geosciences Branch, DE.

W Robert J. Bosnak, Acting Assist' ant Director for Components & Structures Engineering

. Division of Engineering

Enclosures:

As stated DISTRIBUTION:

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