ML072970494

(Public) Distribution of Revision 2 of the NRCs Significance Determination Process Risk-Informed Inspection Notebooks, and Accompanying Phase 2 Pre-Solved Tables

ML072970494
Person / Time
Site:	Diablo Canyon
Issue date:	10/31/2007
From:	Wang A NRC/NRR/ADRO/DORL/LPLIV
To:	Keenan J Pacific Gas & Electric Co
Wang, A B, NRR/DORL/LPLIV, 415-1445
Shared Package
ML072970492	List: ML072970494
References
SECY-99-007A, TAC MD6415
Download: ML072970494 (4)

Text

161FFll."AL W56i QN6*L SEIR ITYM R56'J04i69 RIfFORMATI¶I11i UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 October 31, 2007 Mr. John S. Keenan Senior Vice President and Chief Nuclear Officer Pacific Gas and Electric Company Diablo Canyon Power Plant P.O. Box 770000 San Francisco, CA 94177-0001

SUBJECT:

DIABLO CANYON POWER PLANT, UNIT NOS. 1 AND 2 - DISTRIBUTION OF REVISION 2 OF THE NRC'S SIGNIFICANCE DETERMINATION PROCESS RISK-INFORMED INSPECTION NOTEBOOKS, AND ACCOMPANYING PHASE 2 PRE-SOLVED TABLES

Dear Mr. Keenan:

In 2004, the U.S. Nuclear Regulatory Commission (NRC) requested information from licensees to support the Significance Determination Process (SDP) Risk-Informed Inspection Notebook (notebook) enhancement/standardization effort. The NRC has completed this effort and has issued Revision 2 of the notebook for Diablo Canyon Power Plant, Unit Nos. 1 and 2. The NRC developed these notebooks to facilitate Phase 2 of the NRC inspection finding significance determination process detailed in Inspection Manual Chapter 0609, "Significance Determination Process," Appendix A, "Determining the Significance of Reactor Inspection Findings for At-Power Situations." SECY-99-007A, "Recommendations for Reactor Oversight Process Improvements," sets forth this process and additional details are included in the NRC\\

Inspection Manual Chapter 0308, "Reactor Oversight Process Basis Document." NRC inspectors and risk analysts, who have extensive understanding of plant-specific design features and operation, are expected to use these notebooks. The notebooks will be updated on a case-by-case basis as needed to reflect changes to the facilities.

Revision 2 of the notebooks is accompanied by the Site Specific Pre-Soived Spreadsheet (the Spreadsheet). The NRC added the Spreadsheet to help reduce the time it takes to process inspection findings. The NRC benchmarked the notebooks against licensee Probability Risk Assessments and plant configurations. The enclosed compact disk containing the above documents is provided for your use to facilitate your understanding of the SDP in Inspection Manual Chapter 0609.

The enclosure transmitted herewith contains Security-Related information.

When separated from enclosure, this document is decontrolled.

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IV2 I1 llA-rr-1f11Ot*lRm Al' J. S. Keenan The information on the enclosed compact disk is designated exempt from public disclosure pursuant to Section 2.390(d)(1) of Title 10 of the Code of Federal Regulations since it contains security-related information.

If you have any questions, please contact me at (301) 415-1445.

Sincerely, Alan B. Wang, Pr ctManager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor. Regulation Docket Nos. 50-275 and 50-323

Enclosure:

Compact Disk for Diablo Canyon Power Plant, Unit Nos. 1 and 2 with SDP Revision 2 and Site Specific Pre-Solved Spreadsheet Official Use Only -

Security Related Information cc w/o encl: See next page lrRl/ClAIMi IJrif t'II

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Diablo Canyon Power Plant, Units 1 and 2 cc:

NRC Resident Inspector Diablo Canyon Power Plant c/o U.S. Nuclear Regulatory Commission P.O. Box 369 Avila Beach, CA 93424 Sierra Club San Lucia Chapter ATTN: Andrew Christie P.O. Box 15755 San Luis Obispo, CA 93406 Ms. Nancy Culver San Luis Obispo Mothers for Peace P.O. Box 164 Pismo Beach, CA 93448 Chairman San Luis Obispo County Board of Supervisors 1055 Monterey Street, Suite D430 San Luis Obispo, CA 93408 Mr. Truman Burns Mr. Robert Kinosian California Public Utilities Commission 505 Van Ness, Room 4102 San Francisco, CA 94102 Diablo Canyon Independent Safety Committee Attn: Robert R. Wellington,.Esq.

Legal Counsel 857 Cass Street, Suite D Monterey, CA 93940 Regional Adminstrator, Region IV U.S. Nuclear Regulatory Commission Harris Tower & Pavillion 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 Jennifer Post, Esq.

Pacific Gas &-Electric Company P.O. Box 7442 San Francisco, CA 94120 City Editor The Tribune 3825 South Higuera Street P.O. Box 112 San Luis, Obispo, CA 94306-0112 Director, Radiologic Health Branch State Department of Health Services P.O. Box 997414, MS 7610 Sacramento, CA 95899-7414 Mr. James Boyd, Commissioner California Energy Commission 1516 Ninth Street MS (31)

Sacramento, CA 95831 Mr. James R. Becker, Vice President Diablo Canyon Operations and Station Director Diablo Canyon Power Plant P.O. Box 56 Avila Beach, CA 93424 Jennifer Tang Field Representative United States Senator Barbara Boxer 1700 Montgomery Street, Suite 240 San Francisco, CA 94111 Mr. John T. Conway Site Vice President Diablo Canyon Power Plant

.P. 0. Box 56 Avila Beach, California 93424 August 2007

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GEO8fIT flE!ATFED INFORlMAT-J. S. Keenan. October 31, 2007 The information on the enclosed compact disk is designated exempt from public disclosure pursuant to Section 2,390(d)(1) of Title 10 of the Code of Federal Regulations since it contains security-related information.

If you.have any questions, please contact me at (301) 415-1445.

Sincerely, IRA/

Alan B. Wang, Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos.. 50-275 and 50-323

Enclosure:

Compact Disk for Diablo Canyon Power Plant, Unit Nos. 1 and 2 with SDP Revision 2 and Site Specific Pre-Solved Spreadsheet Official Use Only -

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