05000334/LER-1982-037-03, /03L-0:on 820921,steam Generator 1A Level Protection Channel III Signal Comparator LC-FW476A Declared Inoperable Due to Faulty Actuation & Trip Setpoint Drift Found During Surveillance Testing.Hagan Comparator Replaced

/03L-0:on 820921,steam Generator 1A Level Protection Channel III Signal Comparator LC-FW476A Declared Inoperable Due to Faulty Actuation & Trip Setpoint Drift Found During Surveillance Testing.Hagan Comparator Replaced

ML20027C262
Person / Time
Site:	Beaver Valley
Issue date:	09/27/1982
From:	DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20027C257	List: 05000334/LER-1982-037, Forwards LER 82-037/03L-0 05000334/LER-1982-037-03, /03L-0:on 820921,steam Generator 1A Level Protection Channel III Signal Comparator LC-FW476A Declared Inoperable Due to Faulty Actuation & Trip Setpoint Drift Found During Surveillance Testing.Hagan Comparator Replaced
References
LER-82-037-03L, LER-82-37-3L, NUDOCS 8210150208
Download: ML20027C262 (2)

LER-1982-037, /03L-0:on 820921,steam Generator 1A Level Protection Channel III Signal Comparator LC-FW476A Declared Inoperable Due to Faulty Actuation & Trip Setpoint Drift Found During Surveillance Testing.Hagan Comparator Replaced

Event date:
Report date:
3341982037R03 - NRC Website

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U.S. NUCLEAR REGULATORY COMMISSION IRC FORM 3ss,

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LICENSEE EVENT REPORT CONTROL BLOCK:

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(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 6 0 ltl lP l A l B lV lS l 1 l@l 0 l0 l-l 0 l0 l 0 l0 l0 l-l0 l 0 l@@ l1 l1 l1 l1 l@l l

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8 9 LICENSEE CODE 14 15 LICENSE NUMBER 25 2b LICENSE TYPE JO 5 7 CA T 58

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8 60 61 DOCKET NUM9ER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h O I2l l On 9/21/82. Steam Generator (S/G) 1A Level Protection Channel III l

TTil I signal comparator [Lc-W476Al was declared inoperable due to faulty

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O 14 I l actuation and trip setpoint drif t found during surveillance testing.

I l The protection channel bistable was manually tripped prior to the test

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Olsl O Is l l and left in this condition as required by Tech Spec. Public health and l

0 l 7 ] l safety was never jeopardiked since reactor protection due to a low-low l

S/G water level was maintained thru the operability of the remaining l

oig, 80 8 9 tuo protection enannels in tnis loop.

0E CODE S BC E COMPONENT CODE SUS DE SU E

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10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION LER/RO EVENT VEAR REPORT NO.

CODE TYPE NO.

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40 48 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i i I 0 l l The incident resulted from the failure of the Hagan comparator. The cause l

3 gig l is unknown at this time. On 9/21/82 after replacing the comparator, the l

t i l 2 I I channel was returned to service. Due to the past reliability of the Hagan

, i 3 g l Control Instrumentation, this failure is considered an isolated incident.

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% POWER OTHER STATUS IS O RY DISCOVERY DESCRIPTION i I5 I (,_,,j h l l l 0 l 0 l @ l N/A l

l B l@l Maintenance Surveillance Procedure l ACTIVITY CO TENT P.ELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE 1 l6l h

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PERSONNEL EXPOS ES NUMBER TYPE

DESCRIPTION

1 17 l [ 3 ] 0 l 0 l@[,,Z,,,,j@l N/A l

PERSONN E L INJURIES NUMBER

DESCRIPTION

i la l 1010101@l N/A l

8 9 11 12 80 LOSS OF OR DAMAGE TO FACallTY TYPE

DESCRIPTION

1I9I W hl N/A l

PUBLINTY 0150208 820927 NRC USE ONLY ISSU ED

DESCRIPTION

ADOCK 05000334 2101 l N lbl N/A g PDR I

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Attachment to LER 82-037/03L Beaver Valley Power Station Duquesne Light Company Docket No. 50-334 No further information is available or needed to satisfy the reporting requirement.