ML032720749
| ML032720749 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 09/24/2003 |
| From: | Shukla G Division of Nuclear Materials Safety IV |
| To: | Rueger G Pacific Gas & Electric Co |
| Shukla G | |
| Shared Package | |
| ML032720755 | List: |
| References | |
| Download: ML032720749 (4) | |
Text
September 24, 2003 Mr. Gregory M. Rueger Senior Vice President, Generation and Chief Nuclear Officer Pacific Gas and Electric Company Diablo Canyon Power Plant P. O. Box 3 Avila Beach, CA 93424
SUBJECT:
DIABLO CANYON POWER PLANT, UNIT NO. 1: FINAL ACCIDENT SEQUENCE PRECURSOR ANALYSIS OF MAY 2000 OPERATIONAL EVENT
Dear Mr. Rueger:
Enclosed for your information is the final Accident Sequence Precursor analysis of an operational event which occurred at the Diablo Canyon Power Plant, Unit No. 1 in May 2000.
This event was documented in licensee event report 275/2000-004-01, dated May 5, 2000. The final analysis was prepared based on the staffs review and evaluation of your comments on the preliminary analysis. The responses to your specific comments are included in the enclosure.
The review of your comments utilized the criteria contained in the material which accompanied the preliminary analysis. The results of the final analysis indicate that this event is a precursor
[i.e., the importance or change in core damage probability >1E-6].
The NRC staff is continuing to review the appropriate classification of these documents within our records management program due to changes in our practices following the events of September 11, 2001. Pending a final determination, the attached analyses have been marked as "Sensitive Information" in accordance with Section 2.790(d) of Title 10 of the Code of Federal Regulations. Please control the document accordingly (i.e., treat the document as if you had determined that it contained trade secrets and commercial or financial information that you considered privileged or confidential). We will inform you if the classification of the document changes as a result of our ongoing assessments.
Please contact me at 301-415-8439 if you have any questions regarding the enclosure. We recognize and appreciate the effort expended by you and your staff in providing the comments on the preliminary analysis.
G. Rueger Due to the potential sensitivity of the information described in the enclosure, the staff has not made this enclosure publicly available.
Sincerely,
/RA/
Girija S. Shukla, Project Manager, Section 2 Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-275
Enclosure:
Final Accident Sequence Precursor Analysis cc w/o encl: See next page
G. Rueger Due to the potential sensitivity of the information described in the enclosure, the staff has not made this enclosure publicly available.
Sincerely,
/RA/
Girija S. Shukla, Project Manager, Section 2 Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-275
Enclosure:
Final Accident Sequence Precursor Analysis cc w/o encl: See next page DISTRIBUTION: (w/o enclosure)
PUBLIC PDIV-2 Reading RidsNrrDlpmPdiv (HBerkow)
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MHarper JGolla PKG.: ML032720755 ENCLOSURE: Accession No. ML031920094 (Sensitive/Non-Public)
ACCESSION NO.: ML032720749 NRR-106 OFFICE PDIV-2/PM PDIV-2/LA PDIV-2/SC NAME GShukla:sp EPeyton SDembek DATE 9/22/03 9/22/03 9/23/03 DOCUMENT NAME: C:\\ORPCheckout\\FileNET\\ML032720749.wpd OFFICIAL RECORD COPY
Diablo Canyon Power Plant, Units 1 and 2 cc w/o encl:
NRC Resident Inspector Diablo Canyon Power Plant c/o U.S. Nuclear Regulatory Commission P.O. Box 369 Avila Beach, CA 93424 Mr. Pete Wagner Sierra Club California 2650 Maple Avenue Morro Bay, California 93442 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 Room 370 County Government Center 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 Administrator, Region IV U.S. Nuclear Regulatory Commission Harris Tower & Pavillion 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 Richard F. Locke, Esq.
Pacific Gas & Electric Company P.O. Box 7442 San Francisco, CA 94120 Mr. David H. Oatley, Vice President and General Manager Diablo Canyon Power Plant P.O. Box 56 Avila Beach, CA 93424 City Editor The Tribune 3825 South Higuera Street P.O. Box 112 San Luis Obispo, CA 93406-0112 Mr. Ed Bailey, Radiation Program Director Radiologic Health Branch State Department of Health Services P.O. Box 942732 (MS 178)
Sacramento, CA 94234-7320 Mr. James D. Boyd, Commissioner California Energy Commission 1516 Ninth Street (MS 31)
Sacramento, CA 95814 Mr. James R. Becker, Vice President Diablo Canyon Operations and Station Director Diablo Canyon Power Plant P.O. Box 3 Avila Beach, CA 93424