ML19309F377

LER 80-005/03L-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

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: ML19309F373 ML19309F377
References
LER-80-005-03L-01, LER-80-5-3L-1, NUDOCS 8004290377
Download: ML19309F377 (1)

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I LICENSEE EVENT REPORT 8004h90 G 77 O" w CONTROL BLOCK: I 1

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(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) l@l 57 CAT 58l@

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7 8 60 61 DOCKET NUV8ER 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 I

l o i s i I tripped. #11 Control Room Air Conditionino Unit remained in nnaratinn in got.ii raccordance with T.S. 3.7.7.1.b. Unit 2 was at 100% power. #12 Control I i O I s 1 l Room A/C Unit was returned to service at 0600 on 3/26/80. This is not I m r1 la repetitive evcot. l l0l7l1 j O 18 l l

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44 47 33 34 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 l

li 121 Isaid this was a nomal end-of-life failure of this valvo. The valve was lii3l lreolaced and the unit placed back in service. 1 I

l i 141 1 80 7 8 9 ST S *6 POWER OTHER STATUS DISCO RY DISCOVERY OESCRIPTION Ii 15 l lC l@ l 01110 l@l flA l lAl@l Ooerator Observation l A TivtTY CO TENT RELE ASED OF RELE ASE AMOUNT OF ACTIVITY LOCATION OF RELEASE l

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. 3. .ao eWski/W. B. Pence psoys: (301 W o_a7a7/apie 2 NAME OF PREPARER