05000280/LER-1980-065-03, /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

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/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:
References
LER-80-065-03L-01, LER-80-65-3L-1, NUDOCS 8010200513
Download: ML18139A754 (2)
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LER-1980-065, /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
Event date:
Report date:
2801980065R03 - NRC Website
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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!

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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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1-.

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

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