ML18139A501

LER 80-055/03L-0:on 800816,during Performance of PT 15.2, MOV-FW-151A Failed to Indicate in Closed Position. Investigation Showed Valve in Open Position.Probably Caused by Mechanical Failure of Valve Operator

ML18139A501
Person / Time
Site:	Surry
Issue date:	09/15/1980
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139A500	List: ML18139A499 ML18139A501 ML18139A502
References
LER-80-055-03L, LER-80-55-3L, NUDOCS 8009190559
Download: ML18139A501 (2)

Text

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S. NUCLEAR REGULATORY COMMISSION LICENSEE EVENT REPORT CONTROLBLOCK:J ~--'----'---'--'--....__,!(2) (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6 C§::E] I VI A I s I p I s I 11010 I O I - I O I O I O I O I O I - I O I O 101 4 I 1 I 1 I 1 I 1 101 I I 0 7 8 9 LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58 CON'T ITITI 7 8

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60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES <,o) l During performance of PT-15.2, MOv-Ft,Y-.1s1A failed to indicate in the closed position.

Investigation showed valve 1rema:ined in the open position. Normal and. primary emergency considerations require valve to be open (in position to feed steam generator). Steam

~enerator can be isolated by use of valves outside containment. This condition is reportable in accordance with T.S. 6.6.2.b.(2). The health and safety of the public were not affected.

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47 CAUSE DESCRIPTION Ar'j.D CORRECTIVE ACTIONS @

J Mechanical failure of valve MOV-FW-151A prevented both remote and local operation.

I MOV-FW-151A will be repaired during the next scheduled outage.

ITEl8 7 9 80 FACILITY '3a' METHOD OF STATUS  % POWER OTHER STATUS ~ DISCOVERY DISCOVERY DESCRIPTION @

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ATTACHMENT I (PAGE l OF 1) e e SURRY POWER STATION, UNIT l DOCKET NO: 50-280 REPORT NO: 80-055/03L-0 EVENT DATE: 08-16-80 TITLE OF EVENT: MOV-FW-151A FAILURE TO OPERATE

1. DESCRIPTION OF EVENT:

During performance of PT 15.2, MOV-FW-151A failed to indicate in the closed position. Investigation showed valverr.emained in the open position .. Normal and primary emergency considerations require valve to be open (in position to feed steam generator). This condition is reportable in accordance with T.S. 6.6.2.

b. (2) *

2. PROBABLE CONSEQUENCES AND STATUS OF REDUNDANT SYSTEMS:

MOV-FW-151A is in a position that will provide emergency feedwater to 'C' Steam Generator as required for a Loss of Normal Feedwater event. If auxiliary feedwater is required to be isolated from 'C' Steam Generator, sufficient time is available for manual isolation outside of the containment. Therefore, the health and safety of the public has not been affected.

3. CAUSE OF THE EVENT:

Mechanical failure of the valve operator is suspected at this time.

4. IMMEDIATE CORRECTIVE ACTION:

Investigatedreason for valve failure. Verified valve in the required position, i.e. open.

5. SUBSEQUENT CORRECTIVE ACTION:

Instructions provided to the operating staff for method of manual isolation, if required.

6. FUTURE CORRECTIVE ACTION:

The valve will be repaired at the next scheduled outage.and failure mode con-firmed.

7. GENERIC IMPLICATIONS:

None