ML13316B551
| ML13316B551 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 12/19/1990 |
| From: | Kokajko L Office of Nuclear Reactor Regulation |
| To: | Ray H Southern California Edison Co |
| Shared Package | |
| ML13316B552 | List: |
| References | |
| TAC-75107 NUDOCS 9101090150 | |
| Download: ML13316B551 (3) | |
Text
UNITED STATES N9 LEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 December 19, 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:
ISSUANCE OF AMENDMENT NO. 140 TO PROVISIONAL OPERATING LICENSE NO. DPR-13 FOR THE SAN ONOFRE NUCLEAR GENERATING STATION, UNIT NO. 1 (TAC NO. 75107)
The Commission has issued the enclosed Amendment No. 140 to Provisional Operating License No. DPR-13 for San Onofre Nuclear Generating Station, Unit No. 1. The amendment provides NRC approval of the thermal shield support system replacement design and revises License Condition 3.M in response to your application dated April 20, 1990, as supplemented by letters dated May 24, June 8, July 7, July 12, July 27, August 28, August 31, October 19, and by two letters dated November 29, 1990. The notice of issuance will be included in the Commission's next regular biweekly Federal Register notice.
As stated in Section 11.0 of the enclosed Safety Evaluation (SE), NRC approval of your request is contingent upon satisfactory resolution of a number of outstanding issues. Specifically:
(a) Additional evaluation of the thermal shield support system analytical model is required, taking into consideration the Cycle 11 outage as-found conditions. Any changes to the analytical model as a result of this evaluatiun must be assessed in terms of the thermal shield support system design (SE Section 4.4).
(b) Failed fasteners that were removed from the support system must be examined in detail to determine the root cause of fastener failure (SE Section 4.4).
(c) Prior to Cycle 12 operation, Technical Specification Requirements for monitoring the condition of the thermal shield during plant operation and for inspecting the thermal shield support system during periods when the plant is shut down must be implemented (SE Section 5.8).
(d) Results of corrosion testing of AISI Type 316 SS bolting materials must confirm that the bolted configuration is not susceptible to stress corrosion cracking (SE Section 5.8).
(e) In developing the acceptance criteria for neutron noise and acoustical noise monitoring, specific frequency ranges and amplitude changes 9101090150 901219 PDR ADOCK 05000206 P
Mr. Harold B. Ray
- 2 that would correspond to the various postulated failures that could occur relative to the thermal shield support structures must be identified (SE Section 8.1).
(f) The final neutron noise and acoustical noise monitoring acceptance criteria identifying the specific frequency ranges and amplitude changes discussed in (e) above and the basis for the criteria must be submitted for NRC review and approval within 120 days of returning the unit to service (SE Section 8.1).
(g) Acoustical noise monitoring capabilities must be significantly improved for operation beyond Cycle 11 (SE Section 8.1).
The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under Pub. L.96-511.
You are requested to submit your schedule for addressing these issues, except for item (d), within 60 days of the date of this letter. We will inform you of the item (d) corrosion test results when they become available.
Sincerely, Original signed by:
Lawrence E. Kokajko, Project Manager Project Directorate V Division of Reactor Projects III/IV/V Office of Nuclear Reactor Regulation
Enclosures:
- 1.
Amendment No. 140 to License No. DPR-13
- 2. Safety Evaluation cc w/enclosures:
See next page DISTRIBUTION Docket File (50-206)
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JTatum JDavis BBoger JCalvo Wanda Jones RWharton MVirgilio ACRS (10)
DTerao LKokajko GPA/PA PD5 Plant File JRajan JDyer DFoster OC/LFMB CHinson
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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 100 Avenida Presidio 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)-