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 Mr. Ed Bailey, Chief Nuclear Generation Radiologic Health Branch Southern California Edison Company State Department of Health Services San Onofre Nuclear Generating Station Post Office Box 997414 (MS7610)
P. O. Box 128 Sacramento, CA 95899-7414 San Clemente, CA 92674-0128 Resident Inspector/San Onofre NPS Mr. Douglas K. Porter 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 Eileen M. Teichert, Esq. California Energy Commission Supervising 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 Power Projects/Contracts Manager P.O. Box 128 Riverside Public Utilities San Clemente, CA 92764-0128 2911 Adams Street Riverside, CA 92504 Mr. Brian Katz Vice President, Nuclear Oversight and Regional Administrator, Region IV Regulatory Affairs.
U.S. Nuclear Regulatory Commission San Onofre Nuclear Generating Station 611 Ryan Plaza Drive, Suite 400 P.O. Box 128 Arlington, TX 76011-8064 San Clemente, CA 92764-0128 Mr. Michael Olson Mr. Steve Hsu San Diego Gas & Electric Company Department of Health Services P.O. Box 1831 Radiologic Health Branch San Diego, CA 92112-4150 MS 7610, P.O. Box 997414 Sacramento, CA 95899