ML20008F588

Final Deficiency Rept Re Potential Improper Operation of Fisher Controls Co Valve Actuators.Initially Reported on 810218.Modified Worm Gear Sector & Mounting Pin Will Be Supplied by Manufacturer

ML20008F588
Person / Time
Site:	Wolf Creek
Issue date:	03/18/1981
From:	Koester G KANSAS GAS & ELECTRIC CO.
To:	Madsen G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
10CFR-050.55E, 10CFR-50.55E, KMLNRC-81-064, KMLNRC-81-64, NUDOCS 8104210331
Download: ML20008F588 (4)

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1. M KANSAS CAS ANO ELECTRIC COMPANY w ea=ra.c cww<

oss==s aossrse v'CJ -*E s osasf eiwcLane March 18, 1981 m

Mr. G.L. Madsen, Chief Q' aQ, Reactor Projects Branch p U.S. Nuc'. ear Regulatory Commission f~? [

Region IV 611 Ryan Plaza Crive lQ h,phg

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Suite 10C0 (,. D' g Arlington, Texas 76011 \g d' -

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% O KMLNRC 81-064 Re: Docket No. STN 50-482

Dear Mr. Madsen:

On February 17, 1481, Kansas Gas and Electric Company received notification from the Fisher Controls Company of a potential 10CFR21 deficiency concerning valve actuators for valves shipped to Wolf Creek. This infor nation was reported for KG&E as a potential 10CFR50.55(e) to Mr. Crossman of Region IV on February 18, 1981. It was subsequently determined that the deficiency was reportable in accordance with 10CFR50.55(e) , and a final report on the deficiency is attcchcd.

Please advise if you need additional infomation.

Yours very truly, I s 00 ib l

l l GLK:bb Attach l

! cc: TVandel (NRC Site Inspector) l l

810.42.1033/ 3 I .?01.'s Marnet - Wicnta, Kansas - Mad Aadress: P0. Sou 208 : hichta, Kansas 67201 - Teleonone: Area Coce (316) 261-6451 l

i FINAL 10CFR50.55(e)

REPORT ON POTENTIAL FAILURE OF VALVE ACTUATORS FURNISHED BY FISHER CONTROLS COMPANY

, TO KANSAS GAS AND ELECTRIC COMPANY c

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l March 18, 1981 Wichita, Kansas

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Page 1 of 2 10CFR50.55(e) Report Fisher Controls i

1 TABLE OF CONTENTS 1.0 Introduction 2.0 Description of Reportable Deficiency 3.0 Analysis of Safety Implications 4.0 Corrective Action D

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. , 1.0CFR50.55(e) Report Page 2 of 2 Fisher Controls

1.0 INTRODUCTION

, In accordance with the requirements of 10CFR50.55(e), this final report is prepared to provide a description of a deficiency related to the potential improper operation of valves which-could have affected the safe shutdown capability of Wolf Creek Generating Station, Unit No 1.

On February 17, 1981 KG&E received notification from the Fisher Controls Company of a potential 10CFR21 deficiency concerning valve actuators for two valves shipped to the Wolf Creek site. This information was reported 8

for KG&E as a potential 10CFR50.55(e) to Mr Crossman of the Region IV

• office on February 18. Our Architect / Engineer subsequently determined that the deficiency would impact the capability to acnieve safe shutdown conditions for the Wolf Creek plant. Fisher on February 25, 1981- reported the deficiency to the Region IV office as a 10CFR21 defect.

2.0 DESCRIPTION

OF REPORTABLE DEFICIENCY Fisher Controls Size 2, Type 1073 and 1074 manual actuators are utilized on i SNUPPS valve tag numbers EJ-V-033 and EJ-V-038. Fisher reports that life cycle test for these type valves indicated a potential failure of the worm gear sector of the actuators. Failure of this part would result in the valve disc becoming uncoupled from the actuator and the valve would tend I to Close.

3.0 ANALYSIS OF SAFETY IMPLICATIONS Each affected valve controls component cooling water flow to a Residual Heat Removal (RHR) heat exchanger in a SNUPPS plant. The failure of a valve as identified by Fisher could result in the loss of component cooling water flow to a RHR heat exchanger. Operation of the RHR heat exchangers is a safety-related function and loss of these heat exchangers would impact the capability to achieve safe shutdown.

l 4.0 CORRECTIVE ACTION i Fisher has determined that a modified worm gear sector and mounting pin will enable the valve actuators to function as designed.

One of the valves shipped to Wolf Creek is installed and the other is in storage. NCR ISN2969MR has been issued to track this deficiency. The

! NCR will be dispositioned upon receipt from Fisher of the modified com-i ponents and completion of the modification to the two valves, f

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