ML20063K845

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Informs of Intent to Reduce Position Verification Procedure on Locked,Manual Valves in ECCS from Daily to Monthly.Daily Verification Program Implemented in Response to IE Bulletin 79-08,Item 6
ML20063K845
Person / Time
Site: Dresden, Quad Cities, 05000000
Issue date: 08/31/1982
From: Swartz E
COMMONWEALTH EDISON CO.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
REF-SSINS-6820 4925N, IEB-79-08, IEB-79-8, NUDOCS 8209080505
Download: ML20063K845 (2)


Text

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  • d N ' Commonwealth Edison

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x Chicago. Illinois 60690 Augus t 31, 1982 Mr. James G. Keppler, Regional Adminis trator Directorate of Inspection and Enforcement - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137

Subject:

Dresden Station Units 2 and 3 Quad Cities Station Units 1 and 2 IE Bulletin No. 79-08 Item No. 6 Daily Position Verification of ECCS Valves NRC Docket Nos. 50-207/249 and 50-254/265 Re ferences (a): Cordell Reed letter to J. G. Keppler dated April 27, 1979 (b): Cordell Reed letter to T. A. Ippolito dated Augus t 3, 1979 (c): J. G. Keppler letter to Byron Lee, Jr.

dated April 14, 1979 (d): T. A. Ippolito letter to D. L. Peoples dated March 10, 1980

Dear Mr. Keppler:

References (a) and (b) provided the Commonwealth Edison Company commitments concerning safety-related valve position verification in response to Re ference (c) IE Bulletin No. 79-08 Item 6 for our Dresden and Quad Cities Stations. Subsequently, Re ferenc e (d) provided the' results o f the NRC Staff evaluation which concluded that our commitments satisfied the intent o f IE Bulletin 79-08 for this Item 6.

In particular, we indicated that the positions o f vital manual ECCS valves are controlled by the use and documentation of locks on the handwheels. ' Additionally, we committed to implement a procedure for daily verification that all accessible ECCS valves in the main flow paths are in their proper positions.

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Since the implementation of this procedure in 1979 at both Dresden and Quad Cities Stations, the daily valve position verification has'never identified any locked manual ECCS valves as being out o f proper position. For this reason, and the fact that the position of these valves is controlled by chains and padlocks, we believe that daily surveillances are no longer warranted in order to address ~ the original NRC Staff concerns regarding valve position verification; In view of the above, we feel that monthly verification is now a more appropriate response to IE Bulletin 79-08 Item 6 concerning manual ECCS valves. Therefore, we intend to reduce the frequency of position verification on locked, manual valves in the ECCS systems from once per day to once per month at our Dresden and Quad Cities Stations. Our current position verification practice on

'other valves in the ECCS systems will remain unchanged.

Please address any questions that you or your staf f may have concerning this matter to this office.

Very truly yours,

/

E. auglas Swart Nuclear Licensing Administrator cc: Region III Inspector - Dresden Region III Inspector - Quad Cities Darrell G. Eisenhut - D/DL 4925N

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