ML20054M744

Forwards Loose Thermal Sleeve Safety Evaluation, Supporting Operation of Facility in Light of Recent Problems W/Thermal Sleeves.Operation W/Loose/Degraded Thermal Sleeves in RCS Does Not Pose Safety Concern

ML20054M744
Person / Time
Site:	McGuire
Issue date:	07/13/1982
From:	Parker W DUKE POWER CO.
To:	Adensam E, Harold Denton Office of Nuclear Reactor Regulation
Shared Package
ML20054M745	List: ML20054M744 ML20054M746
References
NUDOCS 8207140352
Download: ML20054M744 (2)

Text

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DUKE POWER COMPANY Powru Dun.oiwo

' 422 Sourn Cnuncu Sruzzi, CnAutorTz, N. C. asa4a WILLI AM O. PAR K ER, J R, InpMONC Anta 704 Vict PasseDENT Svtame Pnoouction Ju1Y 13* 19g2 373-4083 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Attention: Ms. E. G. Adensam, Chief Licensing Branch No. 4 Re: McGuire Nuclear Station, Unit 1 Docket No. 50-369 Thermal Sleeves

Dear Mr. Denton:

Attached are reports detailing the examinations and evaluations performed by Duke Power Company and Westinghouse Electric Corporation to support operation of McGuire Unit 1 in light of recent problems with thermal sleeves. Attachment 1 contains a description of the problem and a detailed evaluation of the safety aspects of operation with the affected thermal sleeves in their present and worst expected condition. Attachment 2 is a summary of the inspections and testing conducted to verify the status of t.ie thermal sleeves in McGuire Unit 1. Attach-ment 3 contains a description of the loose parts monitoring system (LPMS) in-stalled in Unit 1 and plans for use of the system during the next period of operation. Also described are proposed plans for operation with a loose thermal sleeve and removal of installed thermal sleeves.

This matter has been reviewed by both the Westinghouse Safety Review Committee (WSRC) and the Duke Power Company Nuclear Safety Review Board (NSRB). The NSRB made several recor.rnendations which they felt would enhance safe operation, and thcae items are being included in the overall program for restart of the unit.

The conclusion reached by both the WSRC and the NSRB was that operation with loose / degraded thermal sleeves in the reactor coolant system (RCS) does not pose a safety concern.

Additionally, this matter was reviewed pursuant to 10CFR50.59 by the appropriate personnel at McGuire Nuclear Station with Westinghouse input. This review re-sulted in the determination that operation with loose / degraded thermal sleeves does not constitute un unreviewed safety question.

In summary, it is concluded that power operation can continue with the thermal sleeves in their present condition. Neither the current condition nor further -

degradation of the thermal sleeves is expected to adversely affect the safety'of operation by either impairing the integrity of the RCS boundary or by affecting the operability of any RCS or core components.

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8207140352 820713 PDR ADOCK 05000369

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. Mr. Harold R. Denton, Director July 13, 1982 Page 2 Ver truly yours, e

( - -_ + d . . .

William O. Parker, Jr.

GAC/php Attachment cc: Mr. James P. O'Reilly, Regional Administrator U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 Mr. P. R. Bemis Senior Resident Inspector McGuire Nuclear Station

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