ML16342B710

Informs That 901001 Request for Draft USGS Rept on Seismic re-evaluation Program Cannot Be Granted Due to NRC Policy

ML16342B710
Person / Time
Site:	Diablo Canyon
Issue date:	11/07/1990
From:	Rood H Office of Nuclear Reactor Regulation
To:	Kempton K SAN LUIS OBISPO COUNTY, CA
References
NUDOCS 9011160039
Download: ML16342B710 (4)

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Docket Nos.

50-275 and 50-323 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 November 7, 1990 J)oc~

Nr. Karl Kempton Energy Division Department of Planning and Building San Luis Obispo County City Government Center San Luis Obispo; California 93408

SUBJECT:

REQUEST FOR RELEASE OF DRAFT USGS REPORT I am responding to your letter of October 1, 1990, which requested that we send you a copy of the draft USGS report on the Diablo Canyon seismic re-evaluation program.

I cannot comply with your request at this time because Agency policy precludes release of draft or pre-, decisional material prior to the conclusion of a review.

The NRC staff is currently reviewing a seismic re-evaluation of the plant that the Pacific Gas and Electric Company (PG&E) recently conducted.

The re-evaluation is also known as the Long Term Seismic Program, or LTSP.

The seismic re-evaluation was conducted by PGIIE to comply with a condition of the Diablo Canyon Unit 1 operating license issued by the NRC to PG5 E in 1984.

The NRC review team consists of a number of NRC staff experts in the areas of geology, seismology, engineering, and probabilistic risk assessment.

To assist with its review, the NRC has retained consultants from universities, national laboratories, the U.S. Geological Survey and several consulting firms.

The staff review team will consider the recommendations of all of its consultants in reaching a decision regarding the adequacy of the seismic design of Diablo Canyon.

When its, review of the Diablo Canyon seismic re-evaluation program is completed, the NRC will document the results in a Safety Evaluation Report (SER).

The USGS is currently reviewing certain aspects of the Long-Term

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~ t Mr. Kar 1 Kempton Seismic Program, and is expected, in the near future, to send a final report to the NRC summarizing its revie>i.

The staff plans to include the USGS final report and some of the other consultant reports as appendices to the SER.

I wi 11 be pleased to send a copy of the SER, including its appendices, to you when it is issued.

Sincerely, Otig~AQ Sig08~ 8')

Harry Rood, Senior Project Manager Project Directorate V

Division of Reactor Projects - III, IV, V and Special Projects Office of Nuclear Reactor Regulation J-

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