05000366/LER-1980-051-03, /03L-0:on 800409,while Shutdown for Surveillance/ Vent Header Deflector Installation Outage,Dirty Radwaste Discharge Isolation Valve 2G11-F004 Found Leaking in Excess of Spec.Caused by Improper Sealing of Valve Gate

/03L-0:on 800409,while Shutdown for Surveillance/ Vent Header Deflector Installation Outage,Dirty Radwaste Discharge Isolation Valve 2G11-F004 Found Leaking in Excess of Spec.Caused by Improper Sealing of Valve Gate

ML19309H201
Person / Time
Site:	Hatch
Issue date:	04/30/1980
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19309H199	List: 05000366/LER-1980-051, Forwards LER 80-051/03L-0 05000366/LER-1980-051-03, /03L-0:on 800409,while Shutdown for Surveillance/ Vent Header Deflector Installation Outage,Dirty Radwaste Discharge Isolation Valve 2G11-F004 Found Leaking in Excess of Spec.Caused by Improper Sealing of Valve Gate
References
LER-80-051-03L, LER-80-51-3L, NUDOCS 8005090347
Download: ML19309H201 (2)

LER-1980-051, /03L-0:on 800409,while Shutdown for Surveillance/ Vent Header Deflector Installation Outage,Dirty Radwaste Discharge Isolation Valve 2G11-F004 Found Leaking in Excess of Spec.Caused by Improper Sealing of Valve Gate

Event date:
Report date:
3661980051R03 - NRC Website

text

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60 61 OOCKET NUMSER 64 63 EVENT DATE 74

?S REPORT OATE 80 EVENT DESCRIPTION AND PROSABLE CONSEQUENCES h p ',

ITTTl l Du ri ng the performance of LLRTs while shutdown for a surveillance / vent I

lo l31 I header deflector installation outage, dirty radwaste discharge isolation!

[TTTl I valve 2G11-F004 did not have acceptable results during its initial test.1 j

IOlsiIThe leakage rate for this valve is included in both the.60La limit of I

g, limi t of Tech Specs 3.6.1. 2.b. 2.

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!' 101s 1 l Tech Specs 3.6.1.2.b.1 and the.009La [TTTl i There were no effects upon public health or safety due to this event.

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10181 l This is a repetitive event - see LER #50-366/1980-041.

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43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 1i101 IThe cause of the unacceptable leakaoe rate for dhe valve was imoroper I

Iseating of the valve cate.

Corrective valve maimtenance (valve seat I

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{ [TTT1 Iwas lapped and gate skim cut) was performed such that the J_tcrementionedt i 3 111mi ts of Tech Specs 3.6.1.2.b.1 and.2 are met.

Unit is now in full l

L'_Li.] l compliance with the requirements, and no further reporting is required. I OTHER status @I$EO!!Ev'

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912-367-7781

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NAME OF PREPAREn

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\\k LER #:

50-366/1980-051 Licensee:

Georgia Power Company Facility Name:

Edwin I.

Hatch

. Docket #:

50-366

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Narrative

Report 4

for LER 50-366/1980-051

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On'3-9-80, with the anit in cold shutdown for a surveillance /

1

--vent header deflector installation outage, local leak rate testing being, performed per HNP-2-3952, PRIMARY CONTAINMENT PERIODIC TYPE B

AND TYPE C

LEAKAGE

TESTS, showed dirty L -

radwaste isolation valve 2G11-F004 to be leaking in excess of specified criteria ("As Found" leakage would not pressurize).

This valve's leakage rate is included in both the.60La and

'the

.009La leakage rate limits of Tech Specs sections

% 3.6.1.2.b.1 and 3.6.1.2.b respectively.

' There were no effects upon public health or safety due to this see LER #50-366/

event.

This is a repetitive occurrence 1980-041.

- The cause of the unacceptable leakage rate for the valve was failure of the valve gate to properly seat.

Corrective valve

< maintenance (valve seat was lapped.

The valve gate skim was cut, and the angle on one side was changed 3 degrees.) was performed such that the.60La and the

.009La limits of the previously enumerated. Tech Specs section were met

("after 52 ~ actual cubic centimeters per maintenance" leakage minute).

Unit is now in full compliance with the requirements, and no further reporting is required.

, This is not a generic problem although valve leakage during LLRTs is common to both units.

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