ML052450470
| ML052450470 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 09/02/2005 |
| From: | Marsh L NRC/NRR/DLPM |
| To: | Ray H Southern California Edison Co |
| SHUKLA G , NRR/DLPM/PD4, 415-8420 | |
| References | |
| Download: ML052450470 (4) | |
Text
September 2, 2005 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:
CALIFORNIA INDEPENDENT SYSTEM OPERATOR (CAISO)
COMMUNICATIONS WITH SOUTHERN CALIFORNIA EDISON COMPANY DURING THE POWER LINE OUTAGE ON AUGUST 25, 2005
Dear Mr. Ray:
On August 25, 2005, a loss of a major western transmission line occurred just as California power use was approaching its peak. This forced the California Independent System Operator (CAISO) to issue a Transmission Emergency Notice for Southern California and to request utilities in the Southern Region to reduce demand on the system by dropping 900 megawatts of firm load and 800 megawatts of voluntary, interruptible customers. The Nuclear Regulatory Commission staff is concerned that these conditions may have challenged the operability of the offsite power for San Onofre Nuclear Generating Station (SONGS), Units 2 and 3. While the problem was adequately resolved by the end of the day, we would appreciate your assessment of your communications with the CAISO as it relates to grid conditions and reliable offsite power for SONGS.
We are making continued efforts to ensure appropriate communication between nuclear power plant operators and grid operators. The issuance of Temporary Instruction 2515/163, Operational Readiness of Offsite Power, is a recent effort to take a snapshot of relevant operational readiness at nuclear power plants. Any information that addresses the following questions would enable us to better understand the effectiveness of your efforts in this area.
1.
Did the CAISO issue any warnings on the abnormal conditions for August 25, 2005? If there were any warnings, what were those warnings and when were they issued?
2.
What type of warnings were directly communicated to SONGS?
3.
Was there any communication with SONGS from the transmission system operator (TSO)/CAISO before or after load shedding was ordered on the grid?
4.
Did the communication with the grid operators/CAISO meet your expectations?
5.
Recognizing the significance of the grid transient, what is your assessment regarding the adequacy of the interaction with the TSO/CAISO that you experienced during this event?
H. Ray We would appreciate your comments by September 30, 2005. If you have any questions regarding the information in this letter, please contact Mr. Girija Shukla at 301-415-8439.
Sincerely, Ledyard B. Marsh, Director /RA/
Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-361 and 50-362 cc: See next page
H. Ray We would appreciate your comments by September 30, 2005. If you have any questions regarding the information in this letter, please contact Mr. Girija Shukla at 301-415-8439.
Sincerely, Ledyard B. Marsh, Director /RA/
Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-361 and 50-362 cc: See next page DISTRIBUTION:
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RidsOgcRp TKoshy RJenkins JCalvo RidsNrrDE ACCESSION NO.: ML052450470 NRR-106 OFFICE PDIV-2/PM PDIV-2/LA PDIV/PD DLPM/D NAME GShukla DClarke HBerkow LMarsh DATE 9/2/05 9/2/05 9/2/05 9/2/05 OFFICIAL RECORD COPY
San Onofre Nuclear Generating Station Units 2 and 3 cc:
Mr. Daniel P. Breig, 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. 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 Vice President, Nuclear Oversight and Regulatory Affairs.
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