05000250/LER-1981-002-01, /01T-0:on 810103,during Planned Shutdown,Boric Acid Flowpath from Boric Acid Tanks Found Obstructed.Caused by Reduced Temp Resulting from Failure of One Channel of Heat Tracing Circuit 21.Temp Setpoint Increased

/01T-0:on 810103,during Planned Shutdown,Boric Acid Flowpath from Boric Acid Tanks Found Obstructed.Caused by Reduced Temp Resulting from Failure of One Channel of Heat Tracing Circuit 21.Temp Setpoint Increased

ML17340A662
Person / Time
Site:	Turkey Point
Issue date:	01/16/1981
From:	Pace P FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML17340A661	List: 05000250/LER-1981-002, Forwards LER 81-002/01T-0 05000250/LER-1981-002-01, /01T-0:on 810103,during Planned Shutdown,Boric Acid Flowpath from Boric Acid Tanks Found Obstructed.Caused by Reduced Temp Resulting from Failure of One Channel of Heat Tracing Circuit 21.Temp Setpoint Increased
References
LER-81-002-01T, LER-81-2-1T, NUDOCS 8102030543
Download: ML17340A662 (2)

LER-1981-002, /01T-0:on 810103,during Planned Shutdown,Boric Acid Flowpath from Boric Acid Tanks Found Obstructed.Caused by Reduced Temp Resulting from Failure of One Channel of Heat Tracing Circuit 21.Temp Setpoint Increased

Event date:
Report date:
2501981002R01 - NRC Website

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the boric acid tanks as described in TS 3.6.b.4 was found to be obstructed.

The flow path was re-established in 1 hr.

33 min.

Public health and safety was not affected.

The alternate flow path from the Refueling 9

Water Storage Tank was operable throu hout this eriod.

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" LJIi L'JO MQ ~S CAUSE OESCRIPTION ANO CORRECTIVE ACTIONS'Q23 The apparent cause of the obstruction was reduced temperature resulting from failure of one channel of heat tracing circuit no.

21.

The circuit.

'i was found to have 4 open sections and, a partial ground.

The root cause could not be determined.

The temperature set point on the remaining channel was increased.to re-establish flow.

Damaged channel was repaired.l 1

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