ML18139A754

LER 80-065/03L-0:on 800917,w/unit at Refueling Shutdown, MOV-SW-103B Did Not Operate Electrically During Flush of Recirculation Spray Heat Exchangers.Cause Undetermined,But Marine Growth Suspected.Valve Manually Cycled

ML18139A754
Person / Time
Site:	Surry
Issue date:	10/16/1980
From:	WILSON J L VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139A602	List: ML18139A601 ML18139A603 ML18139A604 ML18139A754 ML18139A755
References
LER-80-065-03L-01, LER-80-65-3L-1, NUDOCS 8010200513
Download: ML18139A754 (2)

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IJ]J I With the unit at refueling.

shutdown, MOV-SW-103B did not operate electrically during a TID \ flush of the Recirc Spray heat exchangers.

This valve is one of 4 valves which can Im I admit cooling water to the heat exchangers.

The* other 3 valves were operable, therefore! I the health and safety of the general public were not affected.

This is contrary to ]]]] \T.S.-3.14.A.6 and is reportable per T.S.-6.6.2.b(2). ' 8 SYSTEM .CODE I wjA 18 9 10 CAUSE CAUSE CODE Si.!6C0DE COMPONENT CDDE iu@ Lu@ lv!A!1Jv!ElxJ8

,, 12 1:l 18 SEQUENTIAL OCCURRENCE COMP. SU8C0DE lJLl@) 19 REF'ORT TYPE VALVE SUSCODE Lill@ 20 Q LE ?.IRO c-VENT YEAR REPORT NO. CODE v..v REPORT' I 8 I O I I I I O j 6 1 s I l / I I O I 3 I L!:_J NUMBER 21 22 23 :24 26 27 2E 29 30 :;1 PRIME C:OMP. SUPPLIER REVISION NO. LQ.J 3:2 COMPONENT MANUFACTURER 80

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[TIIJ \shutdown.

The exact cause* for failure of MQV"""SW'*"l03B cannot be determined, however marine growth is su~pected.

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• e ATTACHMENT 1 SURRY POWER STATION, UNIT 1 DOCKET NO: 50-280 REPORT NO: 80-065/031-0 EVENT DATE: 09-17-80 Title of Report: MOV-'SW-103B Valve Non-function

1. Event

Description:

With the during a 3.14.A.6 unit at refueling shutdown-, MOV-SW-103B did flush of the Recirc Spray heat exchangers.

and is reportable per T.S.-6.6.

2. b(2). not operate electrically This is contrary to T.S. 2. Probable Consequences:

MOV-SW-103B admits service water to the header which supplies cooling~ water to the Recirc Spray heat exchangers.

This valve is one of four redundant valves that will supply the Recirc Spray heat exchangers with service water. ( . The redundant MOV-:'s were shown to be functional, therefore the health and safety of the general public were not affected.

3. Cause: 4. There were no electrical or mechanical deficiencies found with MOV-SW-103B when it was inspec-ted subsequent to the aforementioned event. This valve is only cycled during refueling shutdown due to operational restrictions associated with Recirc Spray heat exchangers a?d* therefore could have been stuck -be-cause--o-f-marine growth_. * , / ' Immediate Actions: The immediate actions were to cycle the valve manually (following this cycling the valve operated electrically) and submitt an MR to have the valve inspected.

5. Subsequent Corrective Action: The subsequent corrective action was to.dissemble and clean the valve. 6. Action to Prevent Recurrence:

According to past records, there have not been a similar occurance involving MOV-SW-103A,B,C, or D, this appears to be an isolated case, therefore no future action is required . .7. Generic Implications:

None