ML20212K964

Responds to Siess Re Facility Seismic Design Basis.Nrc Position Acceptable.Licensee Should Be Required to Meet Proposed Values

ML20212K964
Person / Time
Site:	05000000, Diablo Canyon
Issue date:	11/14/1977
From:	Joshua Wilson AFFILIATION NOT ASSIGNED, J.T. WILSON
To:	Mckinley J Advisory Committee on Reactor Safeguards
Shared Package
ML20150F500	List: IR 05000428/2005002 ML20150F498 ML20150F502 ML20150F508 ML20150F512 ML20150F548 ML20209B103 ML20209B317 ML20209C048 ML20209C418 ML20209C422 ML20209C804 ML20209C841 ML20209C858 ML20209C903 ML20209C914 ML20209C919 ML20209C959 ML20209D260 ML20209D318 ML20209D342 ML20209D443 ML20209D706 ML20209D836 ML20209E546 ML20209E553 ML20209G137 ML20212K939 ML20212K943 ML20212K946 ML20212K951 ML20212K956 ML20212K964 ML20212K968 ML20212K975 ML20212K980 ML20212K991 ML20212K996 ML20212L010 ML20212L019 ML20212L025 ML20212L029 ML20212L036 ML20212L048 ML20212L053 ML20212L060 ML20212L065 ML20212L070 ML20212L078 ML20212L085 ... further results
References
FOIA-86-391 ACRS-CT-0900, ACRS-CT-900, NUDOCS 8608250149
Download: ML20212K964 (1)

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) Arbor, Michigan 48109 FEB 161978 l-Navenbor 9, 1977 R E C EI V II D bh[Q l

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n Mr. John C. McKinley - ACRS I

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Dear Mr. McKinley:

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In response to regarding the Diablo,Mr. Siess' letter of November 3, 1977, Canyon site, I consider the position of the NRC staff acceptable.

I do not feel there is any over-conservatism in their values and as a consequence, applicant should be required to meet the fully the values pro-posed and should demonstrate that all critical com'ponents and structures do so.

My conclusions are based on the nature of the Hosgri and associated faults and a consideration of the nature of historic damage to structures along such faults in coastal California,as well as on considerations from instrumental recordings and extrapolations from earthquake source theories.

Very truly yours, u

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C. P. Siess

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