ML062980585

Request for Additional Information on the Proposed Amendment to Revise Fuel Storage Pool Boron Concentration

ML062980585
Person / Time
Site:	San Onofre
Issue date:	10/26/2006
From:	Kalyanam N NRC/NRR/ADRO/DORL/LPLIV
To:	Rosenblum R Southern California Edison Co
Kalynanam N, NRR/DORL/LP4, 415-1480
References
TAC MD1405, TAC MD1406
Download: ML062980585 (5)

Text

October 26, 2006 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 -

REQUEST FOR ADDITIONAL INFORMATION ON THE PROPOSED AMENDMENT TO REVISE FUEL STORAGE POOL BORON CONCENTRATION (TAC NOS. MD1405 AND MD1406)

Dear Mr. Rosenblum:

By letter dated April 28, 2006 (Agencywide Documents Access and Management System Accession No. ML061220701), Southern California Edison submitted an application to change the San Onofre Nuclear Generating Station, Units 2 and 3, technical specifications related to fuel storage pool boron concentration. The proposed change will increase the minimum allowed boron concentration of the spent fuel pool and allow credit for soluble boron, guide tube inserts (GT-Inserts) made from borated stainless steel, and fuel storage patterns in place of Boraflex.

After reviewing your request, the Nuclear Regulatory Commission staff has determined that additional information as required below is needed to complete the review. We discussed this information with your staff by telephone and they agreed to provide the additional information requested by November 16, 2006.

1. Section 2.10 of the Spent Fuel Pool (SFP) Boron Dilution Analysis states that the SFP boron concentration must be verified in accordance with Licensee Controlled Specification 3.7.116 at least every 30 days. Clarify how this verification relates to Technical Specification Surveillance Requirement 3.7.17.1, which requires verification of the SFP boron concentration every 7 days.

R. Rosenblum 2. Given the many dilution paths mentioned, describe how the 7-day surveillance interval is adequate to detect slow boron dilution events. In particular, address the case where unborated makeup is provided for a small (1 - 2 gallons per minute) leak that may be overlooked as an unusual condition and processed through radwaste or be otherwise undetected.

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

ML062980585 *No major change from Staff provided RAI OFFICE NRR/LPL4/PM NRR/LPL4/LA NRR/DSS/SBPB* NRR/LPL4/BC NAME NKalyanam LFeizollahi JSegala DTerao DATE 10/26/06 10/26/06 10/13/06 10/25/06 San Onofre Nuclear Generating Station Units 2 and 3 cc:

Mr. Daniel P. Breig Director, Radiologic Health Branch Southern California Edison Company State Department of Health Services San Onofre Nuclear Generating Station P.O. Box 997414, MS 7610 P. O. Box 128 Sacramento, CA 95899-7414 San Clemente, CA 92674-0128 Resident Inspector/San Onofre NPS Mr. Douglas K. Porter, Esquire c/o U.S. Nuclear Regulatory Commission Southern California Edison Company Post Office Box 4329 2244 Walnut Grove Avenue San Clemente, CA 92674 Rosemead, CA 91770 Mayor Mr. David Spath, Chief City of San Clemente Division of Drinking Water and 100 Avenida Presidio Environmental Management San Clemente, CA 92672 P. O. Box 942732 Sacramento, CA 94234-7320 Mr. James T. Reilly Southern California Edison Company Chairman, Board of Supervisors San Onofre Nuclear Generating Station County of San Diego P.O. Box 128 1600 Pacific Highway, Room 335 San Clemente, CA 92674-0128 San Diego, CA 92101 Mr. James D. Boyd, Commissioner Mark L. Parsons California Energy Commission Deputy City Attorney 1516 Ninth Street (MS 31)

City of Riverside Sacramento, CA 95814 3900 Main Street Riverside, CA 92522 Mr. Ray Waldo, Vice President Southern California Edison Company Mr. Gary L. Nolff San Onofre Nuclear Generating Station Assistant Director - Resources P.O. Box 128 City of Riverside San Clemente, CA 92764-0128 3900 Main Street Riverside, CA 92522 Mr. Brian Katz Southern California Edison Company Regional Administrator, Region IV San Onofre Nuclear Generating Station U.S. Nuclear Regulatory Commission P.O. Box 128 611 Ryan Plaza Drive, Suite 400 San Clemente, CA 92764-0128 Arlington, TX 76011-8064 Mr. Michael R. Olson San Diego Gas & Electric Company 8315 Century Park Ct. CP21G San Diego, CA 92123-1548 March 2006

San Onofre Nuclear Generating Station Units 2 and 3 cc:

Mr. Steve Hsu Department of Health Services Radiologic Health Branch MS 7610, P.O. Box 997414 Sacramento, CA 95899 Mr. A. Edward Scherer Southern California Edison Company San Onofre Nuclear Generating Station P.O. Box 128 San Clemente, CA 92674-0128 March 2006