ML17331B213

Responds to 930928 Response to GL 89-10,suppl 5 Re MOV Diagnostic Equipment.Nrc Will Discuss Response Re Accuracy/ Factor Validation Plan During Future Insp

ML17331B213
Person / Time
Site:	Cook
Issue date:	02/01/1994
From:	John Hickman Office of Nuclear Reactor Regulation
To:	Fitzpatrick E AMERICAN ELECTRIC POWER SERVICE CORP., INDIANA MICHIGAN POWER CO.
References
GL-89-10, TAC-M87936, TAC-M87937, NUDOCS 9402100068
Download: ML17331B213 (4)

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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555.0001 February 1, 1994 Docket Nos.

50-315 and 50-316 Hr. E.

E. Fitzpatrick, Vice President Indiana Michigan Power Company c/o American Electric Power Service Corporation 1 Riverside Plaza

Columbus, Ohio 43215

SUBJECT:

DONALD C.

COOK NUCLEAR PLANT, UNIT NOS.

1 AND 2 - GENERIC LETTER 89-10, SUPPLEMENT 5, "INACCURACY OF MOTOR-OPERATED VALVE DIAGNOSTIC El}UIPHENT" (TACS NOS.

H87936 AND H87937)

On June 28, 1993, the NRC staff issued Supplement 5, "Inaccuracy of Hotor-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 holders (1) to re-examine their HOV programs and to identify measures taken to account for uncertainties in properly setting valve operating thrust to ensure operability, and (2) to evaluate the schedule necessary to consider the new information on HOV diagnostic equipment inaccuracy and to take appropriate action in response to that information.

Within 90 days of receipt of Supplement 5 to GL 89-10, licensees were required (1) to notify the NRC staff of the diagnostic equipment used to confirm the proper size, or to establish settings, for safety-related

HOVs, and (2) to report whether they had taken actions or planned to take actions (including schedule) to address the new information on the accuracy of HOV 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 HOV diagnostic equipment.

The increased inaccuracy of HOV diagnostic equipment can raise questions regarding (1) the adequacy of torque switch settings to provide sufficient thrust while not exceeding thrust or torque structural limits and (2) the capability of actuator motors at current settings.

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

result of the higher than expected inaccuracy of HOV diagnostic equipment.

Consequently, some licensees reported that HOVs have been retested,

adjusted, or modified to resolve the concerns regarding the accuracy of HOV diagnostic equipment.

In your response dated September 28,

1993, you stated that Indiana Michigan Power Co.

(IHPC) uses ABB Impell's OATIS equipment and Liberty Technologies'OTES equipment for HOV diagnostic testing.

You also stated that IHPC has established an HOV accuracy/factor validation plan that will be implemented in 1994.

During a future inspection, the NRC staff will discuss IMPC's resolution of the HOV diagnostic equipment accuracy issue.

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Mr.

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E. Fitzpatrick February 1, 1994 staff will discuss IMPC's current determination of the operability of MOVs in light of the uncertainties surrounding MOV diagnostic equipment accuracy (including the Liberty Technologies'art 21 notice, dated October 2,

1992).

This completes all efforts on TAC Nos.

M87936 and M87937.

If you have any questions regarding this issue, please call me at (301) 504-3017.

Sincerely, Original signed by cc:

See next page John B. Hickman, Project Manager Project Directorate III-1 Division of Reactor Projects III/IV/V Office of Nuclear Reactor Regulation DISTRIBUTION

%Docket File )

NRC

& LPDRs JZwolinski LMarsh ARBlough JHickman CJamerson OGC ACRS(10)

BJorgensen, RIII AHensen TScarbrough 7/E/23 OFFICE DATE LA:PD31 CJamerso Og/ I /94 P'1 c man tN/ I /94 (A D:PD31 ARBlou h m/ j /94 OFFICIAL RECORD COPY FILENAME: G: iWPDOCSiDCCOOKiC087936. GL

4 Mr. E.

E. Fitzpatrick Indiana Michigan Power Company t

CC:

Regional Administrator, Region III U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, Illinois 60532-4351 Attorney General Department of Attorney General 525 West Ottawa Street

Lansing, Michigan 48913 Township Supervisor Lake Township Hall Post Office Box 818 Bridgman, Michigan 49106 Al Blind, Plant Manager Donald C.

Cook Nuclear Plant Post Office Box 458 Bridgman, Michigan 49106 U.S. Nuclear Regulatory Commission Resident Inspector Office 7700 Red Arrow Highway Stevensville, Michigan 49127 Gerald Charnoff, Esquire

Shaw, Pittman, Potts and Trowbridge 2300 N Street, N.

W.

Washington, DC 20037 Mayor, City of Bridgman Post Office Box 366 Bridgman, Michigan 49106 Special Assistant to the Governor Room 1 - State Capitol

Lansing, Michigan 48909 Nuclear Facilities and Environmental Monitoring Section Office Division of Radiological Health Department of Public Health 3423 N. Logan Street P. 0.

Box 30195

Lansing, Michigan 48909 Donald C.

Cook Nuclear Plant Mr. S.

Brewer American Electric Power Service Corporation 1 Riverside Plaza Columbus, Ohio'3215 December 1993