ML20079C089
| ML20079C089 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 06/12/1991 |
| From: | J. J. Barton GENERAL PUBLIC UTILITIES CORP. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| C321-91-2156, IEB-88-010, IEB-88-10, NUDOCS 9106180369 | |
| Download: ML20079C089 (2) | |
Text
GPU Nuclear Corporation G, o Nuclear
- son: v e Tooed Anet. New Jersey 0873103BB 609 971 4000 Wrcer's D, rect D M Numtret C321 91 2156 June 12, 1991 U.S. 11uclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555
References:
- 1. GPU lluclear response to liRCB 88-10 dated April 3, 1989
- 2. NRC letter, Miraglia to Raisin dated february 17, 1989
Dear Sir:
Subject:
Oyster Creek fluclear Generating Station Docket No. 50 219 NRC Bulletin 88 10 "Non Conforming Molded Case Circuit Breakers" This letter is being written to supplement the GPU Nuclear response to NRC Bulletin 8810, "Non conforming Molded Case Circuit Breakers" for the Oyster Creek Nuclear Generating Station, in Reference 1 noted above, GPU Nuclear stated that a total scope of 72 circuit breakers were located in the Oyster Creek warehouse. 68 of those breakers were verified to be fully traceable to their respective original manufacturers and required no further action.
The remaining four breakers were segregated for further evaluation.
In Reference 2, noted above, the Office of Nuclear Reactor Regulation provided clarifications on the original NRC9 88-10 requirements. Clarification 4 stated:
...the staff will not require utilities to test stored non traceable MCCBs but will require, in lieu of testing, all non-traceable breakers be considered failed within the context of the Bulletin.
By this letter, GPU lluclear documents these four breakers to be administratively " failed within the context of the bulletin".
Therefore, the failure rate for the circuit breakers within the scope of the bulletin is 4 out of 72, or 5.6%.
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j U.S. fluclear Regulatory Connission C321-2156 Page 2 Although the original bulletin would require additional testing for the four administratively declared failures based on failure rate, the February 17, 1989 letter goes on to state:
"The staff will, on a case by case basis only, consider the circumstances of individual utilities with a very small number of non traceable MCCBs.
Provided all non traceable MCCBs can be accounted for and the eircumstances contributing to the non traceable stock do not suggest repeatable programmatic breakdowns of utilities procurement practices, the staff may relieve utilities from Als 4 and 5 and instead require only the removal from stock of the non traceable MCCBs.".
As:
- 1) All non traceable circuit breakers have been identified; 2) the one time procurement of these breakers was through a subvendor resulting in the loss of traceability; and 3) the procurement practices have been revised to require procurement of safety related circuit breakers from original manufacturers; CPU 14uclear requests that relief from action items 4 and 5 of 11RCB 88 10 be granted fo ' these four breakers.
Relief from these action items will complete the required actions for l4RCB 88 10 at the Oyster Creek site, if any further information is required, please contact Mr. John Rogers at (609)971-4893.
- Silerly, h
/
Jo,n J. B-an V e Pres ent and Director yster Creek l
JJB/Jc cc: Administrator, Region 1 Senior fiRC Resident Inspector Oyster Creek f;RC project Manager
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