ML20203L897
| ML20203L897 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 03/04/1998 |
| From: | Howell A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Ray H SOUTHERN CALIFORNIA EDISON CO. |
| References | |
| 50-361-97-15, 50-362-97-15, EA-97-414, NUDOCS 9803060289 | |
| Download: ML20203L897 (3) | |
See also: IR 05000361/1997015
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March 4, 1998
EA 97-414
Harold B. Ray, Executive Vice President
Southem Califomia Edison Co.
San Onofre Nuclear Generating Station
P.O. Box 128
San Clemente, Califomia 92674-0128
SUBJECT: RESPONSE TO NRC INSPECTION REPORT 50-361/9715; 50-362/9715
Dear Mr. Ray:
,
Thank you for your letters of October 24,1997, and January 30,1998, in response to
our letter and Notice of Violation of September 10,1997, and letter of January 15,1998,
concerning the failure to adequately evaluate the appropriateness of the performance of
prev 6ntive maintenance prior to placing the Unit 3 reactor coolant system under a 10 CFR
50.65(a)(2) category. We have reviewed your reply and find it responsive to the concems raised
in our Notice of Violation. We will review the implementation of your corrective actions during a
future inspection to determine that full compliance has been achieved and will be :naintained.
Sincerely,
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D
rthur Howellf& 111, Direc or
Division of Reactor Safety
Docket Nos.: 50-361;50-362
License Nos.: NPF 10; NPF e5
cc:
Chairman, Board of Supervisors
County of San Diego
1600 Pacific Highway, Room 335
San Diego, California 92101 -- I
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Mr. Truman Bums %4r. Robert Kinosien
Califomia Public Utilities Commission
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San Francisco, Califomia 94102
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U. S. Nuclear Regulatory Commission >
Document Control Desk pg 4 , ,
Washington, D.C. 20555 t
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Gentlemen: _. 2 _ . _ _
Subject: Docket Nos. 50-361 and 50 362
Reply to a Notice of Violation
San Onofre Nuclear Generating Station, Units 2 and 3
References: (1) Lette,', Mr. A. T. Howall 111 (USNRC) to Mr. Harold B. Ray (f 3E),
dated September 10,1997
(2) Letter, Mr. Harold B. Ray (SCE) to Mr. E. W. Merschoff (USNRC),
dated October 24,1997
(3) Letter, Mr. E. W. Merschoff (USNRC) to Mr. Harold B. Ray (SCE),
dated January 15,1998
Reference 1 transmitted the results of NRC Inspection Report No. 50 361/97-15 and
50-362/97-15, conducted June 30 through July 3,1997, at the San Onofre Nuclear
Generating Station, Units 2 and 3. The enclosure to Reference 1 also transmitted a
Notice of Violation (9715-01). This violation involved the failure to adequately evaluate
the appropriateness of the performance of preventive maintenance prior to placing the
Unit 3 reactor coolant system (RCS) under a 10 CFR 50.65(a)(2) category.
Reference 2 transmitted SCE's original response to the Notice of Violation. In that
response it was stated that SCE believes no violation of the Maintenance Rule
occurred. Notwithstanding this conclusion, in accordance with your guidance in
Reference 3, we are providing the following response to bring the issue to closure. As
noted in References 2 and 3, the reason for the violation was that the failure history
screening performed as part of the Maintenance Rule implementation prior to July 10,
1996, did not include a review of construction work orders (CWOs). Thus, SCE's
decision to place the RCS under 10 CFR 50.65(a)(2) was based on incomplete data.
As corrective actions SCE has: 1) completed a review of CWOs implemented sinca
July 1993 and determined that this was an isolated occurrence; 2) changed the
Maintenance Rule monthly review process to include CWO's; 3) placed the reactor
coolant systems of both units in Category (a)(1) as a result of occurrence- 1 RCS
P.O,Ikn 128
San Clemente. CA 92674-0128
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Document Control Desk 2- January 30,1998
pret sure boundary leakage, including nozzle leakage; and 4) revised the Alloy 600
prog'am plan,90022," Susceptibility of Reactor Coolant System Alloy 600 Nozzles to
Primary Water Stress Corrosion Cracking and Replacement Program," to implement a
strategy to replace penetrations over time. As noted in Reference 3, we plan to
complete allinstrument nozzle repairs by the end of the Cycle 10 refueling outages.
No further corrective actions are planned, and the date of full compliance was July 23,
1997, when the Unit 3 RCS was placed in Category (a)(1).
If you have any further questions, please contact me.
.
Sincerely,
'
"\ S&E. k
Dwight E. Nunn
cc: E. W. Merschoff, Regional Administrator, NRC Region IV
K. E. Perkins, Director, Walnut Creek Field Office, NRC Region IV
M. B. Fields, NRC Project Manager, San Onofre Units 2 and 3
J. A. Sloan, NRC Senior Resident in:pector, San Onofre Units 2 and 3
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