ML042510487
| ML042510487 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 09/07/2004 |
| From: | Bo Pham NRC/NRR/DLPM/LPD4 |
| To: | Ray H Southern California Edison Co |
| Pham B, NRR/DLPM, 415-8450 | |
| References | |
| BL-03-001, TAC MB9610, TAC MC9611 | |
| Download: ML042510487 (4) | |
Text
September 7, 2004 Mr. Harold B. Ray Executive Vice President Southern California Edison Company San Onofre Nuclear Generating Station P.O. Box 128 San Clemente, CA 92674-0128
SUBJECT:
SAN ONOFRE NUCLEAR GENERATING STATION (SONGS) - NRC BULLETIN 2003-01 RE: POTENTIAL IMPACT OF DEBRIS BLOCKAGE ON EMERGENCY SUMP RECIRCULATION AT PRESSURIZED-WATER REACTORS (TAC NOS.MB9610 AND MB9611)
Dear Mr. Ray:
On June 9, 2003, then Nuclear Regulatory Commission (NRC) issued NRC Bulletin 2003-01, "Potential Impact of Debris Blockage on Emergency Sump Recirculation at Pressurized-Water Reactors," requesting licensees to (1) state that the emergency core cooling system (ECCS) and containment spray system (CSS) recirculation functions have been analyzed with respect to the potentially adverse post-accident debris blockage effects identified in the Bulletin and are in compliance with all existing applicable regulatory requirements, or (2) describe any interim compensatory measures that have been implemented or that will be implemented to reduce the interim risk associated with potentially degraded or nonconforming ECCS and CSS recirculation functions until an evaluation to determine compliance is complete. By letter dated August 8, 2003, Southern California Edison Company provided its 60-day response to NRC Bulletin 2003-01 for the SONGS, Units 2 and 3.
The NRC staff has completed its preliminary review of your submittal, and has identified a number of items for which additional information is needed to complete the review. As discussed with Mr. Jack Rainsberry of your staff on August 30, 2004, we request that you respond within 30 days of receipt of this request for additional information to support our closeout goal. If you have any questions, please contact me at (301) 415-8450.
Sincerely,
/RA/
Bo M. Pham, Project Manager, Section 2 Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-361 and 50-362
Enclosure:
Request for Additional Information cc w/encl: See next page
September 7, 2004 Mr. Harold B. Ray Executive Vice President Southern California Edison Company San Onofre Nuclear Generating Station P.O. Box 128 San Clemente, CA 92674-0128
SUBJECT:
SAN ONOFRE NUCLEAR GENERATING STATION (SONGS) - NRC BULLETIN 2003-01 RE: POTENTIAL IMPACT OF DEBRIS BLOCKAGE ON EMERGENCY SUMP RECIRCULATION AT PRESSURIZED-WATER REACTORS (TAC NOS.MB9610 AND MB9611)
Dear Mr. Ray:
On June 9, 2003, then Nuclear Regulatory Commission (NRC) issued NRC Bulletin 2003-01, "Potential Impact of Debris Blockage on Emergency Sump Recirculation at Pressurized-Water Reactors," requesting licensees to (1) state that the emergency core cooling system (ECCS) and containment spray system (CSS) recirculation functions have been analyzed with respect to the potentially adverse post-accident debris blockage effects identified in the Bulletin and are in compliance with all existing applicable regulatory requirements, or (2) describe any interim compensatory measures that have been implemented or that will be implemented to reduce the interim risk associated with potentially degraded or nonconforming ECCS and CSS recirculation functions until an evaluation to determine compliance is complete. By letter dated August 8, 2003, Southern California Edison Company provided its 60-day response to NRC Bulletin 2003-01 for the SONGS, Units 2 and 3.
The NRC staff has completed its preliminary review of your submittal, and has identified a number of items for which additional information is needed to complete the review. As discussed with Mr. Jack Rainsberry of your staff on August 30, 2004, we request that you respond within 30 days of receipt of this request for additional information to support our closeout goal. If you have any questions, please contact me at (301) 415-8450.
Sincerely,
/RA/
Bo M. Pham, Project Manager, Section 2 Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-361 and 50-362
Enclosure:
Request for Additional Information cc w/encl: See next page DISTRIBUTION PUBLIC RidsNrrDlpmLpdiv (Hberkow)
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RidsDlpmDpr ACCESSION NO: ML042510487 Nrr-088
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REQUEST FOR ADDITIONAL INFORMATION (RAI)
SAN ONOFRE NUCLEAR GENERATING STATION (SONGS), UNITS 2 AND 3 SOUTHERN CALIFORNIA EDISON COMPANY NRC BULLETIN 2003-01: POTENTIAL IMPACT OF DEBRIS BLOCKAGE ON EMERGENCY SUMP RECIRCULATION AT PRESSURIZED-WATER REACTORS (PWRs)
DOCKET NOS. 50-361 AND 50-362 By letter dated August 8, 2003, Southern California Edison Company (SCE or the licensee) provided its 60-day response to NRC Bulletin 2003-01 for SONGS, Units 2 and 3. The NRC staff has completed its preliminary review of your response and requests the following additional information to complete our review:
1.
On page 5 of Attachment 1 of your Bulletin 2003-01 response, you state: Licensed operator requalification training will be completed by November 30, 2003 to address loss of flow/loss of pump suction while in recirculation mode of emergency core cooling. The training will address indications of sump clogging and subsequent Severe Accident Management Guidelines. However, your response does not completely discuss the operator training to be implemented. Please provide a detailed discussion of the operating procedures to be implemented, the indications of sump clogging that the operators are instructed to monitor, and the response actions the operators are instructed to take in the event of sump clogging and loss of ECCS recirculation capability.
2.
On page 1 of Attachment 1 of your Bulletin 2003-01 response you state: Additionally, Westinghouse is evaluating potential changes to the guidance in CEN-152. SCE plans to review the potential changes after they become available and make procedural modifications as appropriate. The Westinghouse Owners Group (WOG) has developed operational guidance in response to Bulletin 2003-01 for Westinghouse and Combustion Engineering type PWRs. Please provide a discussion of your plans to consider implementing this new WOG guidance. Include a discussion of the WOG recommended compensatory measures that have been or will be implemented at your plant, and the evaluations or analyses performed to determine which of the WOG recommended changes are acceptable at your plant. Provide technical justification for those WOG recommended compensatory measures not being implemented by your plant. Also include a detailed discussion of the procedures being modified, the operator training being implemented, and your schedule for implementing these compensatory measures.
3.
NRC Bulletin 2003-01 provides possible interim compensatory measures licensees could consider to reduce risks associated with sump clogging. In addition to those compensatory measures listed in Bulletin 2003-01, licensees may also consider implementing unique or plant-specific compensatory measures, as applicable. Please discuss any possible unique or plant-specific compensatory measures you considered for implementation at your plant. Include a basis for rejecting any of these additional considered measures.
San Onofre Nuclear Generating Station, Units 2 and 3 cc:
Mr. Raymond Waldo, Plant Manager Nuclear Generation Southern California Edison Company San Onofre Nuclear Generating Station P. O. Box 128 San Clemente, CA 92674-0128 Mr. Douglas K. Porter 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 Eileen M. Teichert, Esq.
Supervising Deputy City Attorney City of Riverside 3900 Main Street Riverside, CA 92522 Mr. Gary L. Nolff Power Projects/Contracts Manager Riverside Public Utilities 2911 Adams Street Riverside, CA 92504 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 Mr. Michael Olson San Diego Gas & Electric Company P.O. Box 1831 San Diego, CA 92112-4150 Mr. Ed Bailey, Chief Radiologic Health Branch State Department of Health Services Post Office Box 997414 (MS7610)
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. Dwight E. Nunn, Vice President 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. Joseph J. Wambold, Vice President 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