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:	Joshua Wilson 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)

Text

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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).

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ATTACHMENT 1 e

SURRY POWER STATION, UNIT 1 DOCKET NO: 50-280

• 1.

REPORT NO:

Title of Report:

80-065/031-0 EVENT DATE: 09-17-80 Event

Description:

MOV-'SW-103B Valve Non-function With the unit at refueling shutdown-, MOV-SW-103B did not operate electrically during a flush of the Recirc Spray heat exchangers. This is contrary to T.S.

3.14.A.6 and is reportable per T.S.-6.6. 2. b(2).

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:

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

• 4.

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