ML19296D306

LER 80-008/03L-0:on 800126,while Cooling Down for Scheduled Outage,Survey Technician Discovered Steam Blowing from 11A Reactor Coolant Pump.Sensing Line lPDT-123A Had through-wall Leak.Caused by Friction of Sensing Line W/Another Pipe

ML19296D306
Person / Time
Site:	Calvert Cliffs
Issue date:	02/25/1980
From:	Davis S, Pense W BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19296D305	List: ML19296D304 ML19296D306
References
LER-80-008-03L, LER-80-8-3L, NUDOCS 8003030388
Download: ML19296D306 (1)

Text

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74 75 REPORT DATE 80 EVENT DESCalPTION AND PROB A8LE CONSEQUENCES h ITT'E I At 0530 while conducting a plant cooldown for a scheduled outaae a Rad-Chem I o 51 I technician, who was conducting surveys, discovered steam blowino from the l ITITl I area of #11 A Reactor Coolant pump (RCP). Subsequent investication reveal ed l ITTTl that 1-Ptr-123A (#11 A RCP AP transmitter) sensing line had a through-the i O e Iwall leak (T.S. 6.9.1.9.d). The line was isolated by shutting the root valve. 1 ITTTl l The transmitter was not required to be in service when the leak was discovered. I O s l This is not a repetitive occurrence. I

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44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS i O lThe wall leak was caused by wear of the b" sensing line against an adjacent l i, iii pipe. The worn section was cut out of the line and replaced with a new i g section of pipe using swagelock fittings. During the next cold shutdown the I g pipe location will be evaluated and modified to prevent recurrence. I i 4 l 1

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