ML13317B230
| ML13317B230 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 11/30/1990 |
| From: | Tatum J Office of Nuclear Reactor Regulation |
| To: | Ray H SOUTHERN CALIFORNIA EDISON CO. |
| Shared Package | |
| ML13317B231 | List: |
| References | |
| TAC-59138, NUDOCS 9012050280 | |
| Download: ML13317B230 (3) | |
Text
.UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 November 30, 1990 Docket No. 50-206 Mr. Harold B. Ray Senior Vice President Southern California Edison Company Irvine Operations Center 23 Parker Street Irvine, California 92718
Dear Mr. Ray:
SUBJECT:
IMPLEMENTATION OF ATWS RULE REQUIREMENTS (10 CFR 50.62) -
SAN ONOFRE NUCLEAR GENERATING STATION, UNIT NO. 1 (TAC NO. 59138)
We have completed our review of your proposed implementation of ATWS Rule requirements (10 CFR 50.62(c)(1)). Our safety evaluation (SE) regarding this matter is enclosed for your information.
As stated in our SE, we have determined that your proposed implementation of the ATWS Rule is acceptable. This conclusion does not include consideration of ATWS technical specification requirements (SE Section 3.1, Item 14), and is subject to your satisfactory completion of the following actions:
(a) Human-factors engineering reviews must be performed to verify design adequacy of controls and indications used for testing purposes (SE Section 3.1, Item 12) and bypass functions (SE Section 3.1, Item 5).
(b) Environmental qualification considerations (10 CFR 50.49(b)(2)) must be addressed in your safety evaluation (SE Section 3.1, Item 11).
Satisfactory completion of these actions will be verified during a future inspection in accordance with Temporary Instruction 2500/20, and a specific submittal to address these actions is not required. Therefore, you should implement the proposed ATWS modifications during the Cycle 11 outage, and you are requested to inform us in writing when the modifications have actually been implemented and determined to be operational. As discussed in our SE, guidance concerning Technical Specification requirements for ATWS mitigating systems will be the subject of future correspondence.
Finally, the staff will review the issue concerning departure from nucleate boiling as a separate matter (SE Section 3.2). The staff commends you for identifying this issue as one that deserves further NRC review and considers your schedule for resolving this matter to be acceptable.
2,2
0 0
Harold B. Ray
- 2 Please contact us if you should have any questions regarding this matter.
Sincerely, James E. Tatum, Project Manager Project Directorate V Division of Reactor Projects - III, IV, V and Special Projects Office of Nuclear Reactor Regulation
Enclosure:
Safety Evaluation cc w/enclosure:
See next page Distribution
'Docket Fie NRC & LPDRs DCrutchfield BBoger MVirgilio JDyer JTatum (2)
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>/90 OFFICIAL RECORD COPY Document Name:
Mr. Harold B. Ray San Onofre Nuclear Generating Southern California Edison Company Station, Unit No. 1 cc:
David R. Pigott, Esq.
Mr. Richard J. Kosiba, Project Manager Orrick, Herrington & Sutcliffe Bechtel Power Corporation 600 Montgomery Street 12440 E. Imperial Highway San Francisco, California 94111 Norwalk, California 90650 Mr. Robert G. Lacy Mr. Phil Johnson Manager, Nuclear Department U.S. Nuclear Regulatory Commission San Diego Gas & Electric Company Region V P. 0. Box 1831 1450 Maria Lane, Suite 210 San Diego, California 92112 Walnut Creek, California 94596 Resident Inspector, San Onofre NPS c/o U.S. Nuclear Regulatory Commission P. 0. Box 4329 San Clemente, California 92672 Mayor City of San Clemente San Clemente, California 92672 Chairman, Board of Supervisors County of San Diego 1600 Pacific Highway, Room 335 San Diego, California 92101 Regional Administrator, Region V U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, California 94596 Mr. John Hickman Senior Health Physicist Environmental Radioactive Mgmt. Unit Environmental Management Branch State Department of Health Services 714 P Street, Room 616 Sacramento, California 95814 Mr. Don J. Womeldorf Chief, Environmental Management Branch California Department of Health Services 714 P Street, Room 616 Sacramento, California 95814 (10)