B15388, Forwards Generic Ltr 89-10 Design-Basis Closure Millstone Unit 3

Forwards Generic Ltr 89-10 Design-Basis Closure Millstone Unit 3

ML20093C722
Person / Time
Site:	Millstone
Issue date:	10/06/1995
From:	Debarba E, Opeka J NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20093C724	List: B15388, Forwards Generic Ltr 89-10 Design-Basis Closure Millstone Unit 3 ML20093C726
References
B15388, GL-89-10, NUDOCS 9510130002
Download: ML20093C722 (4)

Text

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i 7 8*'d*" 8 t, seriin, CT 06037 N&M

< Utilities System so,16 t twiitie. service comp.ny P.O. Box 270 :

4 li.rtford, CT 061410270

(203) 665-5000

^

October 6, 1995 Docket No. 50-423 B15388 U.S. Nuclear Regulatory Commission Attention: Document Control Desk

- Washington, DC 20555 Millstone'Ndclear Power Station, Unit No. 3 i Clot!ure of Generic Letter 89-10 Attachment 1 to this letter is the Closeout Report for the Generic Letter (GL) 89-10 Motor-Operated Valve (MOV) Program at r Millstone Unit No. 3. This report summarizes actions taken and i information compiled response to GL 89-10,* including in supplements. This Closecut Report will be included in the MOV Program Manual, which is maintained as a controlled document.

Northeast Nuclear Energy Company's (NNECO) GL 89-10 MOV Program i identified safety-related MOVs and their design basis functions, 4

and demonstrated through testing, analysis, and where necessary, modifications, the ability of those valves to fulfill those 1

functions with a high level of certainty. This program included

several proactive features, such as

Use of Kalsi Engineering, Inc., KEI Gate Program for non-testable valves in place of the Electric Power Research Institute's Performance Prediction Methodology which was I

delayed, Development of a comprehensive and consistent structural analysis procedure which replaced diverse vendor seismic weak 4 link calculations, and 4

4 Employment of consistently-determined results from three other operating Northeast Utilities (NU) nuclear power plants to

further validate program assumptions.

In addition, NNECO and NU have been aggressive in addressing recent a pressure locking and thermal binding concerns.

The closeout Report also identifies longer term actions being

, (1) James'G. Partlow letter to All Licensees of Operating Nuclear Power. Plants and Holders of Construction Permits for Nuclear Power Plants, " Safety-Related Motor-Operated Valve Testing and Surveillance," dated June 28, 1989.

I 120027 mu22 an m 0 9510130002 951006 '

PDR- ADOCK 05000423 1 P .PDR 3

'U.S. Nuclear Regulatory Commission-B15388/Page 2 October.6,-1995 The Closeout Report 'also . identifies longer ' term actions being implemented to ensure, on a' continuing basis, that these safety-

- related MOVs will remain capable of fulfilling their' design basis functions'.- With these longer term actions, the Millstone Unit No.

'3 MOV Program becomes a living program which will use performance monitoring and trending to identify problems in advance and adjust programmatic activity to maximize its benefit while minimizing the impact-of MOV work on outage durations.

Commitments B15388-1 NNECO hereby commits to maintaining the MOV Program Manual as the  !

controlling document for the Millstone Unit No. 3 MOV Program.

I - NNECO reserves' the right ' to make changes to the Manual, in accordance with our procedures for- revision of controlled documents, while preserving conformation with GL 89-10 and its' supplements.

, We believe the foregoing'information will support the NRC Staff's closure of NNECO's GL 89-10 efforts for Millstone ' Unit No. 3.

, Should you have any questions or require additional information, please contact Mr. Timothy G. Murray at (203)'440-2068.

I

Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY FOR

J. F. Opeka Executive Vice President BY: --

E. A. DeBarba Vice President c cc: T. T. Martin, Region I Administrator V. L. Rooney, NRC Project Manager, Millstone Unit No. 3 l P. D. Swetland, _ Senior Resident Inspector, Millstone Unit Nos. 1, 2, and 3 a

i'

d UiS.-' Nuclear' Regulatory Commission  !

B15388/Page3 l

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. October.6,'1995 Subscribed and sworn to before me

- this [//_ day of - /)c2a [r r - , 1995 5# dW Date commission Expires:' /s.[4/,!f7 i

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!. Docket No. 50-423 ,

, B15388 1

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Attachment 1 Millstone Nuclear Power Station, Unit No. 3 Closure of Generic. Letter 89-10 1

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October 1995