05000338/LER-1980-045-03, /03L-0:on 800513,deviation of Plus 3% Between Auxiliary Shutdown Panel Indicator LI-1459C & Control Room Indicator LI-1-461 Was Exceeded.Caused by Packing Leak on Isolation Valve 1-RC-129.Valve Repaired

/03L-0:on 800513,deviation of Plus 3% Between Auxiliary Shutdown Panel Indicator LI-1459C & Control Room Indicator LI-1-461 Was Exceeded.Caused by Packing Leak on Isolation Valve 1-RC-129.Valve Repaired

ML19323J022
Person / Time
Site:	North Anna
Issue date:	06/11/1980
From:	Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19323J018	List: 05000338/LER-1980-045, Forwards LER 80-045/03L-0 05000338/LER-1980-045-03, /03L-0:on 800513,deviation of Plus 3% Between Auxiliary Shutdown Panel Indicator LI-1459C & Control Room Indicator LI-1-461 Was Exceeded.Caused by Packing Leak on Isolation Valve 1-RC-129.Valve Repaired
References
LER-80-045-03L, LER-80-45-3L, N-80-12, NUDOCS 8006170650
Download: ML19323J022 (2)

LER-1980-045, /03L-0:on 800513,deviation of Plus 3% Between Auxiliary Shutdown Panel Indicator LI-1459C & Control Room Indicator LI-1-461 Was Exceeded.Caused by Packing Leak on Isolation Valve 1-RC-129.Valve Repaired

Event date:
Report date:
3381980045R03 - NRC Website

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Virginia Electric and Power Company North Anna Power Station, Unit #1

Attachment:

Page 1 of 1 Docket No. 50-338 Report No. LER 80-045/03L-0

Description of Event

On May 13, 1980, while performing periodic test (PT 41.1), the pressurizer level indication deviation on the Auxiliary Shutdown Panel was found to be greater than the P.T. acceptance criteria (i3%). This item is reportable pursuant to T.S. 6.9.1.9.b.

Probable Consequences of Occurrence The minimum number of instrument channels remained operable in the control room. The auxiliary shutdown panel monitoring channel was returned to service within 30 days as per T.S. 3.3.3.5.

Therefore, the health and safety of the general public were not affected.

Cause of Occurrence A packing leak on isolation valve 1-RC-129 caused a decrease in the level of the reference leg.

Immediate Corrective Action

A maintenar.ce request was submitted and the valve was repaired during the May, 1980 outage.

Scheduled Corrective Action The periodic test (PT41.1) was performed to prove the adequacy of repair.

Actions Taken to Prevent Recurrence No further actions are required.