ML071300500
| ML071300500 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 05/15/2007 |
| 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: ML071300500 (6) | |
Text
May 15, 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 (SONGS 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 SONGS 2 and 3, Technical Specifications (TS), "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 30 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/EMCB*
NRR/LPL4/BC NAME NKalyanam JBurkhardt AHowe THiltz DATE 5/14/07 5/11/07 4/20/07 5/15/07
March 2006 San Onofre Nuclear Generating Station Units 2 and 3 cc w/encl:
Mr. Daniel P. Breig 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 Mr. David Spath, Chief Division of Drinking Water and Environmental Management P.O. Box 942732 Sacramento, CA 94234-7320 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 Riverside, CA 92522 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 Mr. Michael R. Olson 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 NPS 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 Mr. Ray Waldo, Vice President Southern California Edison Company San Onofre Nuclear Generating Station P.O. Box 128 San Clemente, CA 92764-0128 Mr. 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
March 2006 San Onofre Nuclear Generating Station Units 2 and 3 cc w/encl:
Mr. A. Edward Scherer Southern California Edison Company San Onofre Nuclear Generating Station P.O. Box 128 San Clemente, CA 92674-0128
Enclosure 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 The license amendment request (LAR) proposes the following changes to Technical Specifications (TSs) 3.3.7, Diesel Generator (DG) - Undervoltage Start, Surveillance Requirements 3.3.7.3.b:
Revise the operating range of the Loss of Voltage Function from $3554 V and
- 3796 V to $ 3594.1 V and # 3745.2 V.
Change the Time Delay from $ 0.75 seconds and # 1.0 seconds at 0 V to
$ 0.26 seconds and # 0.71 seconds at 57 V with initial voltage of 115.5 V.
To support NRCs assessment of the acceptability of the LAR in regard to these setpoint changes, please provide the following for each setpoint to be modified:
1.
Setpoint Calculation Methodology: Provide documentation (including sample calculations) of the methodology used for establishing the limiting setpoint (or NSP) and the limiting acceptable values for the as-found and as-left setpoints as measured in periodic surveillance testing described below. Indicate the related Analytical Limits and other limiting design values (and the sources of these values) for each setpoint.
2.
Describe the measures to be taken to ensure that the associated instrument channel is capable of performing its specified safety functions in accordance with applicable design requirements and associated analyses. Include in your discussion information on the controls you employ to ensure that the as-left trip setting after completion of periodic surveillance is consistent with your setpoint methodology. Also, discuss the plant corrective action processes (including plant procedures) for restoring channels to operable status when channels are determined to be inoperable or operable but degraded. If the controls are located in a document other than the TS (e.g., plant test procedure), describe how it is ensured that the controls will be implemented.
REFERENCES:
1.
NRC Regulatory Issue Summary 2006-17, NRC Staff Position on the Requirements of 10 CFR 50.36, Technical Positions, Regarding Limiting Safety System Settings During Periodic Testing and Calibration of Instrument Channels, dated August 24, 2006. This document is available on the NRC public website in the Agencywide Documents Access and Management System (ADAMS) Accession No. ML051810077.
2.
Letter from Patrick L. Hiland, NRC, to Nuclear Energy Institute (NEI) Setpoint Methods Task Force, "Technical Specification for Addressing Issues Related to Setpoint Allowable Values," dated September 7, 2005, ADAMS Accession No. ML052500004.
3.
Letter from Bruce A. Boger, NRC, to Alexander Marion, NEI, "Instrumentation, Systems, and Automation Society (ISA) S67.04 Methods for Determining Trip Setpoints and Allowable Values for Safety-Related Instrumentation," dated August 23, 2005, ADAMS Accession No. ML051660447.
4.
Letter from James A. Lyons, NRC, to Alexander Marion, NEI, "Instrumentation, Systems, and Automation Society S67.04 Methods for Determining Trip Setpoints and Allowable Values for Safety-Related Instrumentation," dated March 31, 2005, ADAMS Accession No. ML050870008.