05000366/LER-1979-136-03, /03L-0:on 791216,while Performing Function Test After Maint on Torus Vacuum Breaker 2T48-F323H,control Lights Failed to Give Open Indication at Local Panel or Control Room Panel.Cause Unknown.Breaker Will Be Replaced

/03L-0:on 791216,while Performing Function Test After Maint on Torus Vacuum Breaker 2T48-F323H,control Lights Failed to Give Open Indication at Local Panel or Control Room Panel.Cause Unknown.Breaker Will Be Replaced

ML19257B300
Person / Time
Site:	Hatch
Issue date:	01/08/1980
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19257B296	List: 05000366/LER-1979-136, Forwards LER 79-136/03L-0 05000366/LER-1979-136-03, /03L-0:on 791216,while Performing Function Test After Maint on Torus Vacuum Breaker 2T48-F323H,control Lights Failed to Give Open Indication at Local Panel or Control Room Panel.Cause Unknown.Breaker Will Be Replaced
References
LER-79-136-03L-01, LER-79-136-3L-1, NUDOCS 8001150533
Download: ML19257B300 (3)

LER-1979-136, /03L-0:on 791216,while Performing Function Test After Maint on Torus Vacuum Breaker 2T48-F323H,control Lights Failed to Give Open Indication at Local Panel or Control Room Panel.Cause Unknown.Breaker Will Be Replaced

Event date:
Report date:
3661979136R03 - NRC Website

text

(7 77) 2F, LICENSEE EVENT REPORT CONTROL BLOCK:

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8 9 LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE JO 57 CAT 58 CON'T loltl 3[ny [Lj@] 0 510l0l0l316l6l@l1 2l1l617l9l@l0 110l81810]@

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60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h O 2 i With the reactor in the run mode, while performing a functional test after maintenance]

l on Torus Vacuum Breaker, 2T48-F323H, Torus to Drywell Vacuum Breaker, control lights O

3 centr !.rdom panel.

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10 l 4 i l failed to give open indication at the local panel I O l s i i required surveillance on the operable vacuum breaker valves was immediately performed l t

i O is l l per Tech Specs 3.6.4.1 Action a.

There was no significant effect on safe plant l

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I operation.

Public health and safety were not effected by this incident. A similar i

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event occurred on 11-20-79 at Plant E. I. Hatch, Unit II, ref. LER 50-366/1979-124.

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40 41 42 43 44 47 CAUSE CESCRIPTION AND CORRECTIVE ACTIONS h l The cause of the occurrence is unknown at this time due to inaccessibility of the I

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Georgia Power Company Plant E. I. Hatch Baxley, Georgia 30303 Reportable Occurrence Report No. 50-366/1979-136.

Cause Description and Corrective Actions (cont).

A follow-up report will be submitted when the valve repair is completed.

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REPORT Georgia Power Company Plant E. I. Hatch Baxley, Georgia 31513 Reportable Occurrence Report No. 50-366/1979-136.

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While performing a functional test following maintenance on the torus drywell r e: 3 rr; gg. Vacuum breaker, valve 2T48-F323H did not give open indication at the control ogF,rs,jj room panel or the local canel. Required surveillance was performed on the operable vacuum breaker valves per Tech Specs 3.6.4.1 Action a.

The cause of the occurrence is unknown at this time due to the inaccessibility of the valve. The failure is not related to t!.e maintenance performed prior to the failure.

The inoperable vacuum breaker valve will be inspected and repaired as necessary during the next reactor cold shutdown.

This is a repetitive occurrence to E. I. Haten Unit II, ref. Reportable Occurrence No. 50-366/1979-124.

Final action in this area is pending on the result of the investigation that

.4 is to be conducted on vacuum breaker valve,2T48-F323H, during the next E. I. Hatch i

Unit II reactor cold shutdown. A follow-up report will be submitted when the valve repair is completed.

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