05000325/LER-1980-012-03, During Normal Surveillance,Rip Valves X206D-C,variable Leg Isolation for Torus Level Transmitter CAC-LT-2606 & Switch E41-LSH-N015B, Shut & Failed to Reopen.Caused by Leaking Switch Diaphragm

During Normal Surveillance,Rip Valves X206D-C,variable Leg Isolation for Torus Level Transmitter CAC-LT-2606 & Switch E41-LSH-N015B, Shut & Failed to Reopen.Caused by Leaking Switch Diaphragm

ML19338D670
Person / Time
Site:	Brunswick
Issue date:	09/10/1980
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19338D663	List:
References
LER-80-012-03L, LER-80-12-3L, NUDOCS 8009230635
Download: ML19338D670 (2)

LER-1980-012, During Normal Surveillance,Rip Valves X206D-C,variable Leg Isolation for Torus Level Transmitter CAC-LT-2606 & Switch E41-LSH-N015B, Shut & Failed to Reopen.Caused by Leaking Switch Diaphragm

Event date:
Report date:
3251980012R03 - NRC Website

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60 63 DOCKET NUM8ER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABt.E CONSEQUENCES h g l During normal surveillance, RIP valves X206 D-C, variable leg isolation for torus l

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l E41-LSH-N015B, shut and could not be reopened. Other indications were available l

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l-LER ATTACHMENT - RO #1-80-012 Facility: BSEP Unit No.

1 Event Date: February 24,'1980 The RIP valves shut when the non-interruptible instrument air pressure switch, RIP-PSL-1221, drifted shut and allowed the downstream air pressure to decrease below that required to maintain the valves open. A leaking switch diaphragm and 0-ring caused the switch to drift shut and decrease.the air pressure to

~ actuation solenoids.of the valves. The defective diaphragm and 0-ring were re-placed and'the switch and the RIP valves were returned to satisfactory operation.

. ALL RIP valves are periodically tested -for loss of non-interruptible air to the valve actuators as per a plant approved procedure.

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