ML080140006
| ML080140006 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  (NPF-010, NPF-015) |
| Issue date: | 01/15/2008 |
| From: | Kalyanam N NRC/NRR/ADRO/DORL/LPLIV |
| To: | Rosenblum R Southern California Edison Co |
| Kalyanam N, NRR/DORL/LPL4, 415-1480 | |
| References | |
| TAC MC4714, TAC MC4715 | |
| Download: ML080140006 (4) | |
Text
January 15, 2008 Mr. Richard M. Rosenblum Senior Vice President and Chief Nuclear Officer Southern California Edison Company San Onofre Nuclear Generating Station P.O. Box 128 San Clemente, CA 92674-0128
SUBJECT:
SAN ONOFRE NUCLEAR GENERATING STATION, UNITS 2 AND 3 -
APPROVAL OF EXTENSION REQUEST FOR COMPLETION OF CORRECTIVE ACTIONS RE: GL 2004-02, "POTENTIAL IMPACT OF DEBRIS BLOCKAGE ON EMERGENCY RECIRCULATION DURING DESIGN BASIS ACCIDENTS AT PRESSURIZED WATER REACTORS" (TAC NOS. MC4714 AND MC4715)
Dear Mr. Rosenblum:
The U.S. Nuclear Regulatory Commission (NRC) has reviewed the information provided in Southern California Edison's (SCE, the licensee) letter dated December 31, 2007 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML080080420),
regarding Generic Letter (GL) 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized Water Reactors. The letter stated that certain internal reviews of documents addressing GL 2004-02 for the San Onofre Nuclear Generating Station, Units 2 and 3 (SONGS 2 and 3), would not be completed by December 31, 2007, as called for in the GL, and that the documents would be finalized prior to SCEs supplemental response to GL 2004-02, which will be submitted prior to February 29, 2008, as authorized by the NRC in its letter dated November 30, 2007 (ADAMS Accession No. ML073320176), to the Nuclear Energy Institute (NEI).
Your letter states that the remaining activities needed to address GL 2004-02 are completion of internal reviews for (1) debris head-loss calculations, (2) a chemical effects head-loss summary report, (3) a calculation of containment spray and high-pressure safety injection net positive suction head margins, and (4) downstream effects calculations.
The letter states that SONGS 2 and 3 considers its request to fall under Case 1 in the NRC staffs letter to the NEI dated November 8, 2007 (ADAMS Accession No. ML073060581), on the subject of plant-specific extension requests for completion of corrective actions for GL 2004-02.
The November 8, 2007, letter states that Case 1 applies to plants that have completed enough testing and analysis to have confidence that they have satisfactorily resolved the issues associated with strainer performance and GL 2004-02, but cannot complete necessary internal reviews in time to submit the final results to the NRC by the end of 2007. The November 8, 2007, letter also notes that the NRC considers these situations of very low safety significance.
R. Rosenblum Based on your statement that SONGS 2 and 3 fall under the Case 1 as defined in NRC letter dated November 8, 2007, the NRC staff concludes that it is acceptable to extend completion of specified corrective actions (internal reviews of analysis and test results) at SONGS 2 and 3 beyond December 31, 2007, such that completion of corrective actions for GL 2004-02 will be reported to the NRC by February 29, 2008.
If you have any questions, please contact me at (301) 415-1480.
Sincerely,
/RA/
N. Kalyanam, Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-361 and 50-362 cc: See next page
(*)Editorial changes from staff provided letter OFFICE NRR/LPL4/PM NRR/LPL4/LA NRR/DSS/SSIB NRR/LPL4/BC NAME NKalyanam JBurkhardt MScott (*)
THiltz DATE 1/14/08 1/14/08 1/9/08 1/15/08
December 2007 San Onofre Nuclear Generating Station Units 2 and 3 cc:
Douglas K. Porter, Esquire Southern California Edison Company 2244 Walnut Grove Avenue Rosemead, CA 91770 Dr. David Spath, Chief Division of Drinking Water and Environmental Management California Dept. of Health Services 850 Marina Parkway, Bldg P, 2nd Floor Richmond, CA 94804 Chairman, Board of Supervisors County of San Diego 1600 Pacific Highway, Room 335 San Diego, CA 92101 Mark L. Parsons Deputy City Attorney City of Riverside 3900 Main Street Riverside, CA 92522 Mr. Gary L. Nolff Assistant General Manager - Resources Riverside Public Utilities City of Riverside, California 3901 Orange Street Riverside, CA 92501 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 Mr. Michael L. De Marco San Diego Gas & Electric Company 8315 Century Park Ct. CP21G San Diego, CA 92123-1548 Resident Inspector San Onofre Nuclear Generating Station c/o U.S. Nuclear Regulatory Commission Post Office Box 4329 San Clemente, CA 92674 Mayor City of San Clemente 100 Avenida Presidio San Clemente, CA 92672 Mr. James T. Reilly Southern California Edison Company San Onofre Nuclear Generating Station P.O. Box 128 San Clemente, CA 92674-0128 Mr. James D. Boyd California State Liaison Officer Vice Chair and Commissioner California Energy Commission 1516 Ninth Street, MS 31 Sacramento, CA 95814 Mr. Gary Butner Acting Branch Chief Department of Public Health Services Radiologic Health Branch MS 7610, P.O. Box 997414 Sacramento, CA 95899-7414 Mr. Ross T. Ridenoure Vice President and Site Manager Southern California Edison Company San Onofre Nuclear Generating Station P.O. Box 128 San Clemente, CA 92674-0128 Mr. A. Edward Scherer Director, Nuclear Regulatory Affairs Southern California Edison Company San Onofre Nuclear Generating Station P.O. Box 128 San Clemente, CA 92674-0128