ML20247R757
| ML20247R757 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 03/31/1989 |
| From: | Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| IEB-88-010, IEB-88-10, NUDOCS 8904100050 | |
| Download: ML20247R757 (4) | |
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J VINGINIA Er.ncrRIC ann Pownu COMPANY
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March 31, 1989 N ocom A m U. S. Nuclear Regulatory Commission Serial No.
88-788A Attn: Document Control Desk NO/HWB:jmj Rev 4 Washington, D. C. 20555 Docket Nos.
50-338 50-339 License Nos.
NPF-4 NPF-7 Gentlemen:
VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNITS 1 AND 2 RESPONSE TO NRC BULLETIN No. 88-10 As requested by NRC Compliance Bulletin No. 88-10, Nonconforming, Molded-Case Circuit Breakers, a summary of the total number, manufacturer, model number, and to the extent possible, the procurement chain, has been identified for those molded-case circuit breakers (MCCBs) in our station stores which were purchased before August 1,1988 and which could not be traced to a circuit breaker manufacturer (CBM).
This summary is provided in Attachment 1.
We are proceeding with the removal of these non-traceable molded-case circuit breakers from our station stores for use in safety-related systems.
As delineated in the February 17,1989 NRC letter from Mr. F. J. Miragila to Mr. W.'
H. Rasin of NUMARC regarding clarification of NRC Bulletin 88-10, we have opted to proceed directly with the information collection for the molded-case circuit breakers installed in safety-related systems between August 1,1983 and August 1, 1988 in lieu of testing. However, due to the resource requirements to support the outages at North Anna Power Station, we are still in the process of collecting this information. It is our intention to replace any non-traceable molded-case circuit breakers installed in our safety-related systems.
In addition to these ongoing efforts,.we have evaluated our procurement procedures and practices to determine any further actions that should be takm to ensure that only qualified molded-case circuit breakers are being maintained as stored spares for future use in safety-related applications. To accomplish this,in the future we will only purchase circuit breakers for use in safety-related systems
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directly from an approved circuit breaker manufacturer or from an approved distributor that can certify direct traceability to a circuit treaker manufacturer. To provide an additional level of assurance, we will verify this traceability by audit or by other appropriate means.
We w'll provide an updated summary of our non-traceable molded case circuit breakers and a schedule for the replacement of the non-traceable installed circuit breakers by May 8,1989.
These completion dates identified in this letter have been discussed with Mr. L. B.
Engle of your staff. Should you have any questions concerning this response please contact us.
Ve y truly yoursj
- 0 W. R. Cartwri it cc:
U.S. Nuclear Regulatory Commission 101 Marietta Street, N.W.
Suite 2900 Atlanta, GA 30323 Mr. J. L. Caldwell NRC Senior Resir' 4t Inspector North Anna Pow e.
- ation
v ATTACHMENT 1 MOLDED-CASE BREAKER LISTINGG NORTH ANNA POWER STATION March 31. 1989 P.O. Number item Manufacturer Vendor Model Number Number Traceable
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NS 57028 1
General Electric GRAYBAR THED126050WL 2
NO NS 63561 5
General Electric GRAYBAR TFK226T200 1
NO NS 24527 1
General Electric ELECTRICAL EQUIP TEB111050 1
NO NS 29616 6
General Electric GRAYBAR THOB1115 3
NO NS 06139 1
General Electric GRAYBAR THOB22020 4
NO NS 09434 1
General Electric GRAYBAR THED136070WL 1
NO NS 12006 1
General Electric Electrical Suppliers THJK426300WL 1
NO NS 31485 1
Gould I TE ECK Supply EF3-B030 5
NO Total Number l 18 l l
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J COMMONWEALTH OF VIRGINIA )
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COUNTY OF HENRIC0
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The foregoing. document was acknowledged before me,. in and for the. County-and Commonwealth aforesaid, today by W. R. Cartwright who is Vice President Nuclear, of Virginia Electric and - Power Company.
HeL is duly ~ authorized to execute - and file the foregoing document in behalf of that-Company, and the statements in the document are true to the best'of his knowledge and belief.
Acknowledged before me this 3/
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My Commission expires:
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