05000302/LER-1981-056, Forwards LER 81-056/01T-0.Detailed Event Analysis Encl

Forwards LER 81-056/01T-0.Detailed Event Analysis Encl

ML20010H450
Person / Time
Site:	Crystal River
Issue date:	09/16/1981
From:	Baynard P FLORIDA POWER CORP.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20010H451	List: 05000302/LER-1981-056, Forwards LER 81-056/01T-0.Detailed Event Analysis Encl 05000302/LER-1981-056-01, /01T-0:on 810815,atmospheric Radiation Monitor RM-45 Was Inoperable.Caused by Failed Sample Vacuum Pump Due to Broken Carbon Vanes
References
CS-81-207, NUDOCS 8109240487
Download: ML20010H450 (2)

LER-1981-056, Forwards LER 81-056/01T-0.Detailed Event Analysis Encl

Event date:
Report date:
3021981056R00 - NRC Website

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1. 3-091-11 Mr. J. P. O'Reilly, Director Docket No. 50-302 U.S. Nuclear Regulatory Commission Licensee No. DPR-72 Office of Inspection & Enforcement LER No. 81-056/0lT-0 101 Marietta St., Suite 3100 Crystal River Unit #3 Atlanta, GA 30303 Occurrence Date:

August 15, 1981

Dear Mr. O'Reilly:

Enclosed please find Licensee Event Report 81-056/0~.r-0 and the attached supplementary information sheet, which are submitted in accordance with Technical Specification 6.9.1.8.b.

Should there be any questions, please contact us.

Very truly yours, FLORIDA POWER CORPORATION W' Tcil ff n f h t'in & W

,i (vgNuclearPlantManager fatsyi'!/ Bayriard, Manager Nuclear Support Services JC/rc Attachments (2) h s

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G 09240487 g3o916 DR ADOCK 05000302 g

PDR General Office '201 in,rty-fourin street soutn. P O Box 14042, st. Petersburg. Florida 33733 e 813-866-5151

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SUPPLEMENTARY INFORMATION Report No.:

50-302/81-056/0lT-0 Facility:

Crystal River Unit 3 Report Date:

September 16, 1981 Occurrence Date:

August 15, 1981 Identification of Occurrence:

Failure of RM-A5 created an event contrary to Technical Specifica-tion 3.7.7.1 and Technical Specification 3.0.3.

Conditions Pric r to Occurrence:

Mode 1 power operation (100%).

Description of Occurrence:

At 1000, a high flow alarm was observed on Atmospheric Radiation Monitor RM-AS.

At 1045 it was determined that the sample vacuum pump for RM-A5 had failed. Maintenance was initiated,and opera-bility was restored at 1340. At 1615 on September 3, 1981, it was determined that Technical Specification 3.0.3 was applicable to the occurrence. A recirculation lineup had not been initiated within one (1) hour,as required.

Designation of Apparent Cause:

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

Analysis of Occurrence:

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

Corrective Action

The pump failed due to b ken carbon vanes. Grab samples were initiated,and a portable continuous air monitor was started.

The I

pump was replaced and functionally tested.

REI 79-10-9 is under-going engineering evaluation of the failure of Radiation Monitor sample vacuum pumps. Modifi?ation MAR 80-2-7 will initiate an emergency recirculation linecy for the Control Room upon receiving a flow alarm for RM-AS.

Failure Data:

This was the sixth occurrence for RM-A5,and this is the eighth event reported under this Specificatioa.

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