05000317/LER-1980-005-03, /03L-0:on 800325,during Normal Operation,Control Room Air Conditioning Unit 12 Tripped.Caused by Failure of Diaphragm on Unipressure Valve.Valve Replaced & Unit Returned to Svc

/03L-0:on 800325,during Normal Operation,Control Room Air Conditioning Unit 12 Tripped.Caused by Failure of Diaphragm on Unipressure Valve.Valve Replaced & Unit Returned to Svc

ML19309F377
Person / Time
Site:	Calvert Cliffs
Issue date:	04/25/1980
From:	Lagiewski J, Pence W BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19309F374	List: 05000317/LER-1980-005, Forwards LER 80-005/03L-0 05000317/LER-1980-005-03, /03L-0:on 800325,during Normal Operation,Control Room Air Conditioning Unit 12 Tripped.Caused by Failure of Diaphragm on Unipressure Valve.Valve Replaced & Unit Returned to Svc
References
LER-80-005-03L-01, LER-80-5-3L-1, NUDOCS 8004290377
Download: ML19309F377 (1)

LER-1980-005, /03L-0:on 800325,during Normal Operation,Control Room Air Conditioning Unit 12 Tripped.Caused by Failure of Diaphragm on Unipressure Valve.Valve Replaced & Unit Returned to Svc

Event date:
Report date:
3171980005R03 - NRC Website

text

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I LICENSEE EVENT REPORT 8004h90 G 77 O"

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60 61 DOCKET NUV8ER 68 69 EVENT QATE 74 75 REPORT DATE 80 EVENT DESCR'PTION AND PROBABLE CONSEQUENCES h l

l o I i l During nomal operation at 2130, #12 Control Room Air Conditionino Unit I

l o i s i I tripped.

1. 11 Control Room Air Conditionino Unit remained in nnaratinn in I

got.ii raccordance with T.S. 3.7.7.1.b.

Unit 2 was at 100% power.

1. 12 Control I

i O I s 1 l Room A/C Unit was returned to service at 0600 on 3/26/80.

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CODE TYPE N O.

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33 34 35 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTloNS h 12 ;o i lThe trip of #12 Control Room Air Conditionino was caused by a failure of the I

li li j [ diaphragm on the unipressure valve. Manufacturer's representatives on-site I

li 121 Isaid this was a nomal end-of-life failure of this valvo. The valve was l

lii3l lreolaced and the unit placed back in service.

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NAME OF PREPARER