05000334/LER-1980-032-03, /03L-0:on 800503,during Control Board Insp,Vol Control Tank Outlet Valve Was Found Shut.Caused by Short Circuited Lead in Level Comparator.Shorted Wire Replaced

/03L-0:on 800503,during Control Board Insp,Vol Control Tank Outlet Valve Was Found Shut.Caused by Short Circuited Lead in Level Comparator.Shorted Wire Replaced

ML19323H001
Person / Time
Site:	Beaver Valley
Issue date:	06/02/1980
From:	Lacey W DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19323G997	List: 05000334/LER-1980-028-03, /03L-0:on 800504,power Was Lost to Vital Bus Inverter 4 Due to Blown Main Power Supply Fuse.Cause Unknown.Fuse & Rectifier Replaced.Frequency Adjusted 05000334/LER-1980-032-03, /03L-0:on 800503,during Control Board Insp,Vol Control Tank Outlet Valve Was Found Shut.Caused by Short Circuited Lead in Level Comparator.Shorted Wire Replaced ML19323G996
References
LER-80-032-03L, LER-80-32-3L, NUDOCS 8006090382
Download: ML19323H001 (1)

LER-1980-032, /03L-0:on 800503,during Control Board Insp,Vol Control Tank Outlet Valve Was Found Shut.Caused by Short Circuited Lead in Level Comparator.Shorted Wire Replaced

Event date:
Report date:
3341980032R03 - NRC Website

text

_ _ _ _ _ _ _ _ _ _ - - _ _ -.

U.S. NUCLEAR REGULATORY COMMIS$10N j

3 F07M 366 T71 LICENSEE EVENT REPORT CONTROL 8 LOCK: l l

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?S REPORT DAT E do 68 60 EVENT OATE 60 6t DOCK 4T NUV83R 8

EVENT DESCRIPTION AND PRO 8A8LE CONSECUENCES h j

y ! During a control board inspection, an operator found that Volume Control Tank (VCT When opened, the valve would not stay in the j

D I 31 I Outlet Valve [MOV-CH-115C) was shut.

This valve 1

o 141 l open position because of a shorted wire in the level control circuit.

oIsl I beinn shut did not oose a safety problem in that it is upstream of the discharge of I LER 80-20 I

O 161 l the boric acid numns which scoolv the suction of the charcine numns.

his type at Beaver Valley Power l

O j 71 l references the only other event of approximately t I

o la 11 Station.

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intermittently y l VCT Level Comparator [LC-115C) had a short-circuited lead that i

I The redundant channel in this system was deenergized due to i i l indicated a low level.

The combination of the short circuit a deenergized circuit caused I

g i modifications.

The shorted wire was replace.J and all the rest of the l g I the suction valves to shift.

l I module wiring was inspected and found satisfactory.

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LOSS OF OR OAMAGE TO FACILITY l

TYPE

DESCRIPTION

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