ML17180A613

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Discusses Licensee Response to GL 89-10,Suppl 5, Inaccuracy of MOV Diagnostic Equipment. Advises That Staff Will Discuss Licensee Resolution of Accuracy Issue During Future Insp
ML17180A613
Person / Time
Site: Dresden, Byron, Braidwood, Quad Cities, Zion, LaSalle  Constellation icon.png
Issue date: 03/01/1994
From: Shiraki C
Office of Nuclear Reactor Regulation
To: Farrar D
COMMONWEALTH EDISON CO.
References
GL-89-10, TAC-M87919, TAC-M87920, TAC-M87926, TAC-M87927, TAC-M87943, TAC-M87944, TAC-M87961, TAC-M87962, TAC-M87992, TAC-M87993, TAC-M88023, TAC-M88024, NUDOCS 9403080112
Download: ML17180A613 (4)
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Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 Docket Nos. STN 50-456, STN 50-457, STN 50~454, STN 50-455, 50-2_3.7' 50-249, 50-373,,.

50-374, 50-254, 50-265, 50-295 and 50-304 Mr. D. L. Farrar, Manager Nuclear Regulatory Services Commonwealth Edison Company Executive Towers West Ill, Suite 500 1400 OPUS Place Downers Grove, Illinois 60515

Dear Mr. Farrar:

March 1, 1994

SUBJECT:

GENERIC LETTER ~9-10, SUPPLEMENT 5, "INACCURACY OF MOTOR-OPERATED VALVE DIAGNOSTIC EQUIPMENJ" (TAC NOS. *M87919{ M87920, M87926,/-*.

M87927(M87943, M87944, M87961, M87962, M87992, M87993, M88023, AND M88024)

On June 28, 1993, the staff issued Supplement 5, "Inaccuracy of Motor-Operated Valve Diagnostic Equipment," to Generic Letter (GL) 89-10, "Safety-Related Motor-Operated Valve Testing and Surveillance,*requesting nuclear power plant licensees and construction permit holder~: (1) to re-examine their MOV.

programs and to identify measures taken to account for uncertainties in properly setting valve ope.rating thrust to ensure operability, and (2) to evaluate the schedule necessary to consider the new information on MOV diagnosti£ equipment inaccuracy and to take app~opriate action in resp6nse to that information.

Within 90 days of receipt of Supplement 5 to GL 89-10, licensees were required (1) to notify the staff of the diagnostic equipment used to confirm the proper size, or to establish settings, for safety-r~lated MOVs, and (2) to report whether they had taken actions or planned to *take.*

actions (including schedule) to address the new information ~n the accuracy of MOV diagnostic equipment.

The staff has reviewed the responses, and has found that, for the most part, licensees and permit holders have been actively addressing the. uncertainties regarding the accuracy of MOV diagnostic equipment.

The increased inaccuracy of MOV diagnostic equipment can raise questions regarding the adequacy of torque switch settings to provide sufficient thrust while not exceeding thrust or torque structural limits and also the capability of actuator motors at current settings.

In their responses, licensees and permit holders indicated that many MOVs had the potential for underthrusting or overthrusting as a

  • result of the higher than expected inaccuracy of MOV diagnostic equipment.

Consequently, some licensees reported that MOVs have been retested, adjusted, or modified to r~solve the concerns regarding the accuracy of MOV diagnostic equipment.

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Mr. D. L. Farrar

. March 1, 1994 Commonwea 1th Edi son, Com.pany {CECo or the licensee) responded to Supplement 5 in a letter ~ated Septembe~_28, 1993, and st~ted that CECo uses Liberty Technologiesf. VOTES ~quipm~nt to' determine coirect control switch settings for rising stem mqJor*,-*o*perated valves at each of its operating units.

As a result of the O~tobei ~::1992 Lib~~ty Technologi~i 10 CFR Part Zl Notification for VOT~S diagnostic equipment~ the licensee i'nitiated an. internal operability assessment to"*review previous motor 'operated* valve diagnostic traces to

  • determine applicability and impact oh in service equipment.. This assessment was to *be completed by** the 'end, of,.1993. b'ut *as of the September* 28, 1993 1 etter,. no opera bi 1 i ty c.oncerns had, *b,een found.

Subsequent phone ca 11 s with*

. the Jicensee indicate that the a~ies~~~ht ii complete, and-that although some limit*switch adju~t~~hts ~ere hecessary, no jnoperable valves were found:

However, additfonal"'acti_c,rns that would nee~ to be.,.completed to fully

  • disposition the'issue of diagnostic equ'ipment.. inacc.uracy could re.quire two additional refueli;ng.cycles.

Dur.ing a future~inspectioh, the staff will discu*ss the licensee's *resolution of the MOV' diagnostic equipment accuracy issue.

  • ~

This completes all.effort~ ~n TAC NOS.

M~7919, M87920, M87926, M87927, M87943,

  • ~87944, M87961, M87962, M8?992, M87993, M88023, AND M88024.
  • *.. If YOl.J h~ve any questions regarding thiS, issue, please call me at (301}

'504-3101.

~.

cc:* See next page

~. '

DISTRIBUTION.*

JZwolinski OGC RAssa -

AH an sen OFC LA:PDIII-2 NAME

  • Docket File*

.JDyer ACRS(lO)

. JStang TSca.rbrough

'Sincerely,

  • Original signed 'by:

~

Clyde Y. Shiraki, Sentbr Project Manager Project* Directorate III-2 Division of Reacto~*Projects - Il1/1V/V Office 6f Nucl~ar Reactor Regulation NRC & Local PDRs

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.. BCl ayton; :RII I AGody,Jr POI! I-:-2 r /f JRoe CShi raki GDi ck.

C,Patel DATE I

/94

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/94 I

/94 COPY YES/NO YES/NO YES/NO l,

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\\ d Mr. D. L. Farrar cc:

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 801. Warrenville Road Lisle, Illinois 60532-4351 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 Mon~oe Street

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

Chicago, Illinois 60604-3590 Chairman Will County Board of Supervisors Will County Board Courthouse Joliet, Illinois 60434 e

Commonwealth Edison Company U. S. Nuclear Regulatory Commission Byron Resident Inspectors Office 4448 North German Church Road Byron, Illinois 61010-9750 Ms. Lorraine Creek Rt. l, Box 182 Manteno, Illinois 60950 Mrs. Phillip B. Johnson 1907 Stratford Lane Rockford, Illinois 61107 Attorney General 500 South 2nd Street Springfield, Illinois. 62701 U. S. Nuclear Regulatory Commission Resident Inspectors Office 105 Shiloh Blvd.

Zion, I 11 i no is 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 De~t. of Nuclear Safety Office of Nuclear Facility Safety 1035 Outer Park Drive Springfield,. Illinois 62704 Commonwealth Edison Company Braidwood Station Manager Rt. l, Box 84 Braceville, Illinois 60407 Chairman, Ogle County Board Post Office Box 357 Oregon, Illinois 61061

.Howard A. Learner Environmental Law and Policy Center of the Midwest 203 North LaSalle Street Suite 1390 Chicago, Illinois 60601

'..\\

  • Michael I. Miller, Esquire Sidley and Austin One First National Plaza
Chicago, Illi~ois 60690 Mr. G. Spedl Plant Manager Dresden Nuclear Power Station 6500 North Dresden Road Morris, Illinois 60450-9765 U. S. Nuclear Regulatory Commission Resident Inspectors Office Dresden Station 6500 North Dresden Road Morris, Illinois 60450-9766 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 Commission 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 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 4350
  • Davenport, Iowa 52808 Mr. Richard Bax Station Manager Quad Cities Nuclear Power Station 22710 206th Avenue. North Cordova, Illinois 61242 Resident Inspector
  • U. S. Nuclear Regulatory Commission 22712 206th Avenue North Cordova, Illinois 61242 Chairman Rock Island County Board of Supervisors 1504 3rd Avenue Rock Island County Office Bldg.

Rock Island, Illinois 61201 Mayor of Zion Zion, Illinois 60099

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