05000325/LER-1980-012-03, /03L-0:on 800224,during Normal Plant Operation,Rip Valves,Variable Leg Isolation for Torus Level Transmitter & Variable Leg for Torus Level Pressure Switch Shut & Could Not Be Opened.Caused by Failure of Svc Air Compressors

/03L-0:on 800224,during Normal Plant Operation,Rip Valves,Variable Leg Isolation for Torus Level Transmitter & Variable Leg for Torus Level Pressure Switch Shut & Could Not Be Opened.Caused by Failure of Svc Air Compressors

ML19305C710
Person / Time
Site:	Brunswick
Issue date:	03/24/1980
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19305C705	List: 05000325/LER-1980-012, Forwards LER 80-012/03L-0 05000325/LER-1980-012-03, /03L-0:on 800224,during Normal Plant Operation,Rip Valves,Variable Leg Isolation for Torus Level Transmitter & Variable Leg for Torus Level Pressure Switch Shut & Could Not Be Opened.Caused by Failure of Svc Air Compressors
References
LER-80-012-03L-01, LER-80-12-3L-1, NUDOCS 8003310292
Download: ML19305C710 (2)

LER-1980-012, /03L-0:on 800224,during Normal Plant Operation,Rip Valves,Variable Leg Isolation for Torus Level Transmitter & Variable Leg for Torus Level Pressure Switch Shut & Could Not Be Opened.Caused by Failure of Svc Air Compressors

Event date:
Report date:
3251980012R03 - NRC Website

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8 60 bl DOCK ET NUVUER 6d 64 EVENT DATE 14 15 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 10 l 21 l Durina normal plant operation. RIP valves X206 D-C. variable leg isolation for torus i

10131 l level transmitter CAC-LT-2602, and X206 D-D, variable leg for torus level pressure l

1014 I l switch E41-PS-N015B, shut and could not he reopened. Other indications were availablel I0Isl l for these parameters during the 15 minutes they were out of service.

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42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 11101IThe cause for the RIP valves to close and not reopen was a failure of two of three i

1 i lservice air compressors on' Unit No. 1. as these valves fail shut on loss-of-air.

The I m lair svstem was cross-tied to the Unit No. 2 air system and the valves were returned to l

[ i I a l l normal. A plant modification is in progress to install new, large, backup compressors l [i l 4 I l on each unit to ensure an adequate air supply at all times.

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NAME OF PREPARER A.

C. Tollison. Jr.

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LER ATTACitMENT - RO #1-80-12 Facility:

BSEP Unit No.

1 Event Date: February 24, 1980 The loss of the two air compressors caused a loss (isolation) of service air and a decrease in instrument air pressure which caused the RIP valves to shut.

The air compressors were repaired and returned to service.

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