05000317/LER-1980-008-03, /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

/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: 05000317/LER-1980-008, Forwards LER 80-008/03L-0 05000317/LER-1980-008-03, /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
References
LER-80-008-03L, LER-80-8-3L, NUDOCS 8003030388
Download: ML19296D306 (1)

LER-1980-008, /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

Event date:
Report date:
3171980008R03 - NRC Website

text

(I ill LICENSEE EVENT REPORT v

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69 EVENT DATE 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

51 I technician, who was conducting surveys, discovered steam blowino from the l

o 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

Iwall leak (T.S. 6.9.1.9.d).

The line was isolated by shutting the root valve.

1 O e ITTTl l The transmitter was not required to be in service when the leak was discovered.

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s l This is not a repetitive occurrence.

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33 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS lThe wall leak was caused by wear of the b" sensing line against an adjacent l

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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.

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