05000302/LER-1980-033-03, /03L-0:on 800803,following Routine Sampling of Core Flood Tank A,Sample Isolation Valve CFV-11 Failed to Close.Caused by Failed Contact Rotor in Limitorque Operator. Contact Rotor 2 Replaced & Declared Operable

/03L-0:on 800803,following Routine Sampling of Core Flood Tank A,Sample Isolation Valve CFV-11 Failed to Close.Caused by Failed Contact Rotor in Limitorque Operator. Contact Rotor 2 Replaced & Declared Operable

ML19331D817
Person / Time
Site:	Crystal River
Issue date:	08/28/1980
From:	Neuschaefer E FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19331D808	List: 05000302/LER-1980-033, Forwards LER 80-033/03L-0 05000302/LER-1980-033-03, /03L-0:on 800803,following Routine Sampling of Core Flood Tank A,Sample Isolation Valve CFV-11 Failed to Close.Caused by Failed Contact Rotor in Limitorque Operator. Contact Rotor 2 Replaced & Declared Operable
References
LER-80-033-03L, LER-80-33-3L, NUDOCS 8009030609
Download: ML19331D817 (2)

LER-1980-033, /03L-0:on 800803,following Routine Sampling of Core Flood Tank A,Sample Isolation Valve CFV-11 Failed to Close.Caused by Failed Contact Rotor in Limitorque Operator. Contact Rotor 2 Replaced & Declared Operable

Event date:
Report date:
3021980033R03 - NRC Website

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SUPPLEMENTARY INFORMATION Report No.:

50-302/80-033/03L-0 Facility:

Crystal River Unit #3 Report Date:

28 August 1980 Occurrence Date:

3 August 1980 Identification of Occurrence:

Containment isolation valve CFV-ll failed to close contrary to Technical Specification 3.6.3.1, Table 3.6-1.

Conditions Prior to Occurrence:

Mode 4, Hot Shutdown Description of Occurrence:

At 1119 following routine sampling of "A" Core Flood Tank, it was discovered that "A" CFI sample isolation valve, CFV-11, would not close upon remote actuation.

Core Flood Valve, CFV-ll was then manually closed along with Core Flood Valve, CFV-71 to isolate the penetration and maintain containment integrity.

Designation of Apparent Cause:

The cause of this event is attributed to a failed contact rotor in the limitorque operator of core flood valve, CFV-ll.

Analysis of Occurrence:

No effect upon the plant or general public as a result of this event.

Corrective Action

Contact rotor #2 was replaced and the valve declared operable at 0940 on August 5, 1980 after successful completion of SP-370.

An inspection of Core Flood Valve, CFV-ll, limitorque operator has been scheduled for the next planned outage to check for contact rotor wear.

Failure Data:

This is the second occurrence of this type reported for CFV-ll, (reference LER #77-114) and the 26th event reported under specification 3.6.3.1.

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