ML17177A567

Comments on Util 920511 Submittal Re motor-operated Valves. Util Should Review Comments in 920511 Meeting Summary & Incorporate Points Raised by NRC in Plans for Resolving MOV Issues

ML17177A567
Person / Time
Site:	Dresden, Byron, Braidwood, Brunswick, Quad Cities, Zion, LaSalle
Issue date:	07/29/1992
From:	Pulsifer R Office of Nuclear Reactor Regulation
To:	Kovach T COMMONWEALTH EDISON CO.
References
NUDOCS 9208050152
Download: ML17177A567 (4)

Text

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I UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20565 July 29, 1992 Docket Nos. STN 50-454, STN 50-455 STN 50-456, STN 50-457 50-237, 50-249 50-373, 50-374 50-254, 50-265 and 50-295, 50~304 Mr. Thomas J. Kovach Nuclear Licensing Manager Commonwealth Edison Company-Suite 300 OPUS West III 1400 OPUS Place Downers Grove, Illinois 60515

SUBJECT:

COMMENTS ON THE COMMONWEALTH EDISON COMPANY'S SUBMITTAL ON MOV ISSUES DATED MAY 11, 1992 On April 8, 1992, the NRC staff met with representatives of the Commonwealth Edison Company (CECo) to discuss the progress of CECo in developing its program to resolve concerns regarding the performance of motor-operated valves (MOVs) at the CECo facilities.

On May 11, 1992, the staff provided its summary of the meeting and preliminary views on the CECo presentation. Also, on May 11, 1992, CECo submitted to the NRC its response to several MOV issues discussed at the meeting.

Our comments on CECo's May 11 submittal are provided below:

1.

CECo should review the staff's comments in the May 11 meeting summary and incorporate the points raised by the staff in its plans for resolving the MOV issues.

2.

With respect to CECo's d~scussion ir. its May 11 submittal on stem friction coefficients, the staff remains concerned with CECo's plan to conduct only a sampling study to justify its stem friction coefficient assumptions.

CECo will need to justify its assumption for stem friction*

coefficient for each MOV.

Therefore, where CECo does not obtain valve specific information on the stem friction coefficient, CECo will need to assume a stem friction coefficient for that MOV which bounds the information obtained from its sampling program.

The staff does not believe that the planned ten static tests will provide sufficient information to bound the stem friction coefficients for all MOVs under all static and differential pressure conditions.

The assumption of an appropriate stem friction coefficient for an MOV will be difficult because both minimum and maximum limits on MOV capability must be satisfied. Further, CECo's use of an average stem friction coefficient may not be adequate for selecting an appropriate stem friction coefficient because of the wide range of values seen at other facilities. Also, the results of the Electric Power Research Institute

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Mr. Thomas July 29, 1992 (EPRI) program referenced by CECo may not provide strong support for its:*,

assumptions because the stem friction coefficient may be valve specifi~..

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With respect to CECo's discussion in its May 11 submittal on stem

.~lubrication frequency, CECo will need to justify its assumptions for'the ~ "

stem* friction coefficient over the entire lubrication interval under..

• static and worst case differential pressure and flow conditions.

Although CECo states that the minimum thrust requirement was increas~d~

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• to'prQvide margin for stem lubrication degradation, CECo's assumption*of

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the a.ctuator.

In addition to CECo's stated plans, the staff recommend.s_... ~

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-*.,that CECo select a sample of MOVs that have not been lubricated for::-36.

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~ssumptions for various differential pressure and flow conditions.

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With respect to CECo's discussion of post-maintenance testing, differential pressure testing, feedback of test data, and degraded voltage studies, the staff requests that CECo review our comments in the meeting summary dated May 11, 1992.

As a note, the reference by CECo to Question 38 in Supplement 1 to Generic Letter 89-10 concerning its position on static periodic testing does not appear appropriate because Question 38 involves post-maintenance testing.

The staff will review CECo's justification for its assumptions, calculations, and conclusions regarding post-maintenance testing, differential press~re testing, feedback of test data, degraded voltage, periodic verification, and other GL 89-10 issues for specific MOVs and the overall MOV program during future inspections.

OFC NAME DATE

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If you have any questions regarding this issue, please do not hesitate to call me at (301) 504-3016.

DISTRIBUTION:

Docket File PD I II -2 r If.

J. Zwolinski C. Moore L. 01 shan J. Jacobson ACRS (10)

BSiegel JHickman

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See next B. Clayton, RIII NRC & Local PDRs B. Boger R. Barrett R. Pulsifer OGC T. Scarbrough PDII I-2 p/f CPatel RElliott page

• Sincerely, Original signed by:

Robert M. Pulsifer, Project Manager Project Directorate III-2 Division of Reactor Projects - Ill/IV/V Office of Nuclear Rema~

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Mr. William P. Poirier Westinghouse Electric Corporation Energy Systems Business Unit Post Office Box 355, Bay 236 West Pittsburgh, Pennsylvania 15230 Joseph Gallo, Esquire Hopkins and Sutter 888 16th Street, N.W., Suite 700 Washington, D.C.

20006 Regional Administrator U. S. NRC, Region III 799 Roosevelt Road, Bldg. #4 Glen Ellyn, Illinois 60137 Ms. Bridget Little Rorem Appleseed Coordinator 117 North Linden Street Essex, Illinois 60935 Mr. Edward R. Crass Nuclear Safeguards and Licensing Division Sargent & Lundy Engineers 55 East Monroe Street Chicago, Illinois 60603 U. S. Nuclear Regulatory Commission Resident.Inspectors Office Rural Route #1, Box 79 Braceville, Illinois 60407 Mr. Ron Stephens, Director Illinois Emergency Services and Disaster Agency 110 East Adams Street Springfield, Illinois 62706 Robert Neumann Office of Public Counsel State of Illinois Center 100 W. Randolph, Suite 11-300 Chicago, Illinois 60601 EIS Review Coordinator Environmental Protection Agency Region V 230 S. Dearborn Street Chicago, Illinois 60604 Attorney General 500 South 2nd Street Springfield, Illinois 62701 Commo~alth Edison Company U. S. Nuclear Regulatory Commission Byron Resident Inspectors Office 4448 North German Church Road Byron, Illinois 61010 Ms. Lorraine Creek Rt. I, Box 182 Manteno, Illinois 60950 Mrs. Phillip B. Johnson 1907 Stratford Lane Rockford, Illinois 61107 Douglass Cassel, Esquire 17 East Monroe Street, Suite 212 Chicago, Illinois 60603 U. S. Nuclear Regulatory Commission Resident Inspectors Office 105 Shiloh Blvd.

Zion, Illinois 60099 George L. Edgar Newman & Holtzinger, P.C.

1615 L Street, N.W.

Washington, D.C.

20036 Commonwealth Edison Company Byron Station Manager 4450 North German Church Road Byron, Illinois 61010 Illinois Dept. of Nuclear Safety Office of Nuclear Facility Safety 1035 Outer Park Drive Springfield, Illinois 62704 Commonwealth Edison Company Braidwood Station Manager Rt. I, Box 84 Braceville, Illinois 60407 Chairman, Ogle County Board Post Office Box 357 Oregon, Illinois 61061 Chairman Will County Board of Supervisors Will County Board Courthouse Joliet, Illinois 60434

Michael I. Miller, Esquire Sidley and Austin One First National Plaza Chicago, Illinois 60690 Mr. C. Schroeder Plant Manager Dresden Nuclear Power Station Rural Route #1 Morris, Illinois 60450 U. S. Nuclear Regulatory Commission Resident Inspectors Office Dresden Station Rural Route #1 Morris, Illinois 60450 Chairman Board of Supervisors of Grundy County Grundy County Courthouse Morris, Illinois 60450 Phillip P. Steptoe, Esquire Sidley and Austin One First National Plaza Chicago, Illinois 60603 Assistant Attorney General 100 West Randolph Street Suite 12 Chicago, Illinois 60601 Resident Inspector/LaSalle, NPS U. S. Nuclear Regulatory Commissio.n Rural Route No. 1 P. 0. Box 224 Marseilles, Illinois 61341 Chairman LaSalle County Board of Supervisors LaSalle County Courthouse Ottawa, Illinois 61350 Dr. Cecil Lue-Hing Director of Research and Development Metropolitan Sanitary District of Greater Chicago 100 East Erie Street Chicago, Illinois 60611 Robert Cushing Chief, Public Utilities Division Illinois Attorney General's Office 100 West Randolph Street Chicago, Illinois 60601 Mr. G. Diederich LaSalle Station Manager LaSalle County Station Rural Route 1 P. 0. Box 220 Marseilles, Illinois 61341 Chairman Illinois Commerce Commission Leland Building 527 East Capitol Avenue Springfield, Illinois 62706 Mr. Stephen E. Shelton Vice President Iowa-Illinois Gas and Electric Company P. 0. Box 4_350 Davenport, Iowa 52808 Mr. Richard Bax Station Manager Quad Cities Nuclear Power Station 22710 206th Avenue ~orth

~ordova, Illinois 61242 Resident Inspector U. S. Nuclear Regulatory Commission 22712 206th Avenue North Cordova, Illinois 61242 Chairman Rock Island County Board of Supervis9rs 1504 3rd Avenue Rock Island County Office Blqg.

Rock Island, Illinois 61201