ML20246F502
| ML20246F502 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 08/24/1989 |
| From: | Trzyna G COMMONWEALTH EDISON CO. |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8908310023 | |
| Download: ML20246F502 (1) | |
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Comm:nwealth Edison 4
L i-72 West Adams Street, Chicago, Illinois -
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Address Reply to: Post Of'fIc'e Box 767.
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,- v - Chicago. Illinois 60690 - 0767 August 24, 1989
' Director.of Nuclear Reactor. Regulation U.S. Nuclear Regulatory Commission m
LMail Station PI-137 Washington, DC 20555
Subject:
. Zion Nuclear Power Station, Units 1 and 2 License Nos. DPR-39 and DPR-48 NRC Docket Nos. 50-295 and 50-304 Proposed Technical Specification Amendment.
For Section 3.15. " Aux. Electric Power System" Gentlemen:
Commonwealth _ Edison Company (CECO)' submitted a proposed amendment to
. Zion Station's Technical incifications to provide for a one-time extended out~
of service period (1.e.-longer than 7 days) to perform preventative
-maintenance on the-"0" Diesel Generator (DG).
This DG is common to both units and is' included in the extensive five-year preventative maintenance program that is recommended by the manufacturer. The existing Technical Specifications allow for.a 7-day out of service period for the "0" DG, provided additional surveillance are successfully performed during this-period.. Unit operation.is governed by these surveillance requirements.
The purpose of the proposed amendment was to provide a longer out of. service period to ensure that "0" DG is properly maintained, while not significantly affecting the health and safety of the public. A similar type of request was previously, requested and granted.
. Commonwealth Edison Company does not plan to ask for this relief in the future. Commonwealth Edison Company and personnel from your staff have had.several discussions regarding the prudency'of the repeat-requests for extended maintenance periods, (i.e., once every 5 years)'and agrees that an evaluation of.that' practice should be conducted..The exact nature of the prudent alternatives is unknown at this time.
Consequently, Commonwealth Edison suggests that a study be performed to determine alternate methods to perform the preventative maintenance of "0" DG.
These alternatives would include., but not be limited to those i: hat would modify existing plant design or operational changes to plant evolutions.
These results will be shared with your staff at a mutually agreeable date in near future.
Please direct any questions that you may have regarding this matter to this office.
Very truly yours,
'8908310023 890824
[7M 4
fDR ADocK 0500 95.
G.E. Trzyna Nuclear Licensing Administrator 0259T6 iI O cc: Chandu Patel-NRR Senior Resident Inspector - Zion
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