ML13331B320
| ML13331B320 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 04/22/1991 |
| From: | Nandy F Southern California Edison Co |
| To: | NRC/IRM |
| Shared Package | |
| ML13331B322 | List: |
| References | |
| IEB-88-010, IEB-88-10, NUDOCS 9104230436 | |
| Download: ML13331B320 (2) | |
Text
Southern California Edison Company 23 PARKER STREET IRVINE, CALIFORNIA 92718 F. R. NANDY TELEPHONE MANAGER, NUCLEAR LICENSING (714) 454-45O4 April 22, 1991 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D. C. 20555 Gentlemen:
Subject:
Docket Nos. 50-206 Response to NRC Bulletin 88-10, "Non-Conforming Molded Case Circuit Breakers" San Onofre Nuclear Generating Station Unit 1
References:
- 1. F. R. Nandy (SCE) to Document Control Desk (NRC) letter, dated January 4, 1990. Same subject, Unit 2.
- 2. R. M. Rosenblum (SCE) to Document Control Desk (NRC) letter, dated August 21, 1990. Same subject, Unit 3.
This letter provides Southern California Edison's (SCE's) response to the Molded Case Circuit Breaker (MCCB) testing requirements of NRC Bulletin 88-10 for San Onofre Unit 1. NRC Bulletin 88-10 requested Licensees to perform a variety of verification and testing activities to provide reasonable assurance that certain MCCBs will perform their safety function. The affected MCCBs are those which were purchased for use in safety related applications, including MCCBs used in motor controllers, and do not have verifiable traceability to the circuit breaker manufacturer. The NRC's concern was that these MCCBs might have been refurbished without the Licensee's knowledge and may not meet all the manufacturers' specifications.
SCE provided the initial response to NRC Bulletin 88-10 by letter dated March 30, 1989. The March 30, 1989 letter responded to reporting requirements 1 and 3 of the NRC Bulletin and also stated that SCE would submit a report that summarized the results of MCCB tests conducted in accordance with Action Request 3 and 5 of Bulletin 88-10 within 30 days after startup from the Unit 1 Cycle 11, Unit 2 Cycle 5 and Unit 3 Cycle 5 refueling outages. The Unit 2 Cycle 5 refueling outage ended on December 8, 1989, and the Unit 2 report was submitted to the NRC by Reference 1. The Unit 3 Cycle 5 refueling outage ended on July 21, 1990, and the Unit 3 report was submitted to the NRC by Reference 2.
9104230436 910422 PDR ADOCK< 050o0206 PDR
Document Control Desk April 22, 1991 The enclosed report to this letter, "NRC Bulletin 88-10 Outage Report, Unit 1.
Cycle 11," provides the results of testing or replacing MCCBs as committed to in SCE's March 30, 1989 response.
This report does not alter information stated in the initial report or the followup report submitted on September 6, 1989. SCE has also reviewed the enclosed report against the additional clarifications provided in NRC Bulletin 88-10, Supplement 1. This review confirmed that the enclosed report adheres to the clarified NRC guidance for MCCB traceability and testing activities. By submittal of this letter, SCE has satisfied all of the reporting requirements of NRC Bulletin 88-10.
If you have any questions or comments, please contact me.
Very truly yours, State of California County of Orange On April 22, 1991, before me, Mariane Sanchez
, personally appeared F. R. Nandy
, personally known to me A xWAktx Xt bM1AXXXEXXAithhX)6X~tthtX to be the persoriU) whose nameQW io@@@@(
subscribed to the within instrument and acknowledged to me that hebhb@0009 executed the same in his/WrOt tauthorized capacity*()
, and that by his/
1htt X signature(G on the instrument the personQM, or the entity upon behalf of which the person(M acted, executed the instrument.
WITNESS-y hand and official seal.
MA-MA EA Signatur
'v X tk Enclosure cc:
J. B. Martin, Regional Administrator, NRC Region V C. Caldwell, NRC Senior Resident Inspector, San Onofre Units 1, 2, and 3 G. Kalman, NRC Project Manager, San Onofre Unit 1 C. D. Townsend, NRC Resident Inspector, San Onofre Unit 1