ML20038B809

LER 81-004/03L-0:on 810425,during Inservice Testing of Containment Spray Valves (IT-50),Valve 1-860D Failed to Open.Caused by Maladjusted Closing Torque Switch.Switch Adjusted & Valve Retested & Returned to Svc

ML20038B809
Person / Time
Site:	Point Beach
Issue date:	05/10/1981
From:	Burstein S WISCONSIN ELECTRIC POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20038B803	List: ML20038B802 ML20038B809
References
LER-81-004-03L, LER-81-4-3L, NUDOCS 8112090120
Download: ML20038B809 (2)

Text

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IT ln I n In I i l@l n l nl LICENSEE CODE to Ib I nIn I ol 0101- 101 cl@l4 lLICENSE LICENSE NUMBER 25 26 lil 1111 TYPE JO l@l67 LMI 68l@

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? 8 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 10171l While conducting inservice testino of containment snrav valves (IT-50) l i 10 l 3 l l valve 1-860D, containment spray discharge MOV, failed to open. All l l

0 4 l valves that provide- a duplicate function were tested and operated l lo tsi l satisfactorily. l 0 6 l l 0 7 l l 0 8 l l 7 8 9 80 DE CODE SU8C E COMPONENT CODE SUSCOD'E SU DE 7

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_ SEQUENTIAL OCCURRENCE REPORT REVISION L E R RO EVENTVEAR REPORT NO. CODE TYPE NO.

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35 36 40 41 42 43 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h

[110 l l The closina toraue of the valve operator was excessive due to an out-off-i i l adiustment closing torque switch. When attemptinct to open the valve I i 7 1 during testing, the motor stalled and caused the breaker to trip on l i 3 l thermal overload. The closing torque switch was adiusted, the valve l i 4 l retested and returned to service. All redundant systems were availablek 7 8 9 80

$AIUS  % POWE R OTH E R ST ATUS DtS O RY DISCOVERY DESCRIPTION 1 5 (,E_j @ l0l 810l@lN/A l [Bj@l Inservice testing l ACTIVITY CC TENT RELE ASED OF RELEASE AMOUNT OF ACTivlTV LOCATION OF RELEASE i s LZ_J @ 10LZ_J@lN/A I l N/A l 7 8 9 si 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPPON i 7 1010 1 O l@[Zj@l N/A i l

PERSONNE L INJURIES NUVBER DESCRIPTION i R 8 9 I0l0 l0l@l u 52 N/A 80 I

LOSS TYPE OF OR DAMAGE TO FACILITY h DESCRIPTION v

[ [Z_j@l N/A l 7- e iO PUBLICITY n 8112090120 810610 80 PDR S ADOCK 05000266 NRC USE ONLY PDR 2 o LNJ lN/A@oESCniPTiON U45 ISSUED l l l l l l l l l l l l j,,,,j i 7 8 9 10 68 69 80 NAME OF PREPARER Sol Burstein PHONE: 414!2

't ATTACHMENT TO LICENSEE EVENT REPORT NO. 81-004/03L-0 Wisconsin Electric Power Company Point Beach Nuclear Plant Unit 1 Docket No. 50-266 While Unit 1 was operating at approximately 80% power, at 0345 hours0.00399 days <br />0.0958 hours <br />5.704365e-4 weeks <br />1.312725e-4 months <br /> on April 25, 1981, during " Quarterly Inservice Testing of Containment Spray Valves"-(IT-50), spray valve 1-860D failed to open. The redundant valve, 1-860C, had just been tested and operated satisfactorily. This event is reportable in accord-ance with Technical Specification 15.6.9.2.B.2 as a condition leading to operation in a degraded mode permitted by a limited condition for operation.

It was found that the breaker for the motor operator had tripped on the thermal overload. The closing torque switch for IMOV-860D was adjusted, the valve was retested satisfactorily, returning it to service at 0803 hours0.00929 days <br />0.223 hours <br />0.00133 weeks <br />3.055415e-4 months <br />, April 25, 1981. The redundant train of containment spray and all four containment coolers which also perform a redundant function were available.

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