05000302/LER-1980-056-03, /03L-0:on 801219,atmospheric Radiation Monitor RM-A5 Found Inoperable,Rendering Control Complex Emergency Ventilation Sys Inoperable.Caused by Seized Sample Vacuum Pump Due to Normal Wear.Spare Pump Installed & Tested

/03L-0:on 801219,atmospheric Radiation Monitor RM-A5 Found Inoperable,Rendering Control Complex Emergency Ventilation Sys Inoperable.Caused by Seized Sample Vacuum Pump Due to Normal Wear.Spare Pump Installed & Tested

ML19340F069
Person / Time
Site:	Crystal River
Issue date:	01/12/1981
From:	Hernandez V FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19340F042	List: 05000302/LER-1980-056, Forwards LER 80-056/03L-0 05000302/LER-1980-056-03, /03L-0:on 801219,atmospheric Radiation Monitor RM-A5 Found Inoperable,Rendering Control Complex Emergency Ventilation Sys Inoperable.Caused by Seized Sample Vacuum Pump Due to Normal Wear.Spare Pump Installed & Tested
References
LER-80-056-03L, LER-80-56-3L, NUDOCS 8101160634
Download: ML19340F069 (2)

LER-1980-056, /03L-0:on 801219,atmospheric Radiation Monitor RM-A5 Found Inoperable,Rendering Control Complex Emergency Ventilation Sys Inoperable.Caused by Seized Sample Vacuum Pump Due to Normal Wear.Spare Pump Installed & Tested

Event date:
Report date:
3021980056R03 - NRC Website

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SUPPLEMENTARY INFORMATION t

Report No.:

50-302/80-056/03L-0 Facility:

Crystal River Unit 3 Report Date:

January 12, 1981 Occurrence Date:

December 19, 1980 identification of Occurrence:

Failure of RM-A5 created an event contrary to Technical Specification 3.7.7.1.

Conditions Prior to Occurrence:

Mode 1 power operation (99%).

Description of Occurrence:

At 0622 a high flow alarm was observed on RM-AS. At 0630 it was determined by investiaation that the sample vacuum pump for RM-A5 had seized. Emergency control complex fans were placed in full recirc and maintenance was initiated.

Operability was restored at 0915.

Designation of Apparent Cause:

The cause of this event is attributed to a seized sample vacuum pump.

Analysis of Occurrence:

There was no effect upon the health or safety of the ceneral public.

Corrective Action

The sample pump failed due to nornal wear. A spare pump was installed and functionally tested. REI 79-10-9 is under-ooina engineerina evaluation of the failure of radiation monitor sample vacuum pumps.

Failure Data:

This was the third occurrence for RM-A5 and this is the fourth event reported under this Specification.

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