ML072550257
| ML072550257 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 09/24/2007 |
| From: | Kalyanam N NRC/NRR/ADRO/DORL/LPLIV |
| To: | Rosenblum R Southern California Edison Co |
| Kalyanam N, NRR/DORL/LP4, 415-1480 | |
| References | |
| TAC MD5112, TAC MD5113 | |
| Download: ML072550257 (4) | |
Text
September 24, 2007 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 LOSS OF VOLTAGE SIGNAL RELAY REPLACEMENT (TAC NOS. MD5112 AND MD5113)
Dear Mr. Rosenblum:
By letter dated March 30, 2007 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML070930597), Southern California Edison submitted an application to change the San Onofre Nuclear Generating Station, Units 2 and 3, Technical Specifications, "Diesel Generator-Undervoltage Start," Surveillance Requirements 3.3.7.3.b to lower the allowable operating time and narrow the allowable operating voltage band of the loss of voltage function.
After reviewing your request, the Nuclear Regulatory Commission staff has determined that additional information outlined in the enclosure is needed to complete the review. We discussed this information with your staff by telephone and they agreed to provide the additional information requested within 45 days of the receipt of this letter.
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
Enclosure:
Request for Additional Information cc w/encl: See next page
- No major change from Staff provided RAI.
OFFICE NRR/LPL4/PM NRR/LPL4/LA NRR/DE/EEEB*
NRR/LPL4/BC NAME NKalyanam JBurkhardt GWilson THiltz DATE 9/24/07 9/24/07 9/5/07 9/24/07
May 2007 San Onofre Nuclear Generating Station Units 2 and 3 cc:
Mr. Raymond W. Waldo, Vice President, Nuclear Generation Southern California Edison Company San Onofre Nuclear Generating Station P.O. Box 128 San Clemente, CA 92674-0128 Mr. 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 Director - Resources City of Riverside 3900 Main Street, 4th Floor Riverside, CA 92522 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 Mr. Michael J. DeMarco San Diego Gas & Electric Company 8315 Century Park Ct. CP21G San Diego, CA 92123-1548 Director, Radiologic Health Branch State Department of Health Services P.O. Box 997414, MS 7610 Sacramento, CA 95899-7414 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, Commissioner California Energy Commission 1516 Ninth Street (MS 31)
Sacramento, CA 95814 Brian Katz Southern California Edison Company San Onofre Nuclear Generating Station P.O. Box 128 San Clemente, CA 92764-0128 Mr. Steve Hsu Department of Health Services Radiologic Health Branch MS 7610, P.O. Box 997414 Sacramento, CA 95899-7414 Mr. A. Edward Scherer Southern California Edison Company San Onofre Nuclear Generating Station P.O. Box 128 San Clemente, CA 92674-0128
REQUEST FOR ADDITIONAL INFORMATION SAN ONOFRE NUCLEAR GENERATING STATION, UNITS 2 AND 3 TECHNICAL SPECIFICATIONS CHANGES FOR DIESEL GENERATOR UNDERVOLTAGE START INSTRUMENTATION TAC NOS. MD5112 AND MD5113
- 1.
Describe the criteria for determining the voltage and time delay setpoints of the loss of voltage signal (LOVS) relay.
- 2.
Provide a calculation for the time delay setting of the LOVS relay.
- 3.
Confirm that the LOVS relay will not spuriously trip during the starting of the largest motor concurrent with low grid voltage.
- 4.
Provide the complete model number and the inverse timing characteristic curves of the new LOVS relay.