05000302/LER-1981-074, Forwards LER 81-074/03L-0.Detailed Event Analysis Encl

Forwards LER 81-074/03L-0.Detailed Event Analysis Encl

ML20069B440
Person / Time
Site:	Crystal River
Issue date:	12/09/1981
From:	Baynard P, Poole D FLORIDA POWER CORP.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20069B443	List: 05000302/LER-1981-074, Forwards LER 81-074/03L-0.Detailed Event Analysis Encl 05000302/LER-1981-074-03, /03L-0:on 811116,175 Wind Direction Channel Found Not Functioning Properly.Caused by Broken Connector & Bad Sensor.Connector & Sensor Replaced
References
CS-81-327, NUDOCS 8112240218
Download: ML20069B440 (2)

LER-1981-074, Forwards LER 81-074/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3021981074R00 - NRC Website

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.m CS-81-327 December 9. 1981 3-F-1281-21 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. 81-074/03L-0 101 Marietta St., Suite 3100 Crystal River Unit #3 Atlanta, GA 30303 Occurrence Date:

November 16, 1981

Dear Mr. O'Reilly:

Enclosed please find Licensee Event Report 81-074/03L-0 and the attached supplementary information sheet, which are submitted in accordance with Technical Specificat 6.9.1.9.b.

Should there be any questions, please contact us.

Very truly yours, FLORIDA POWER CORPORATION fl.1Lv YawoArt D. C. Poole P[tsy

.Maynh[d, Manager Nuclear Plant Manager Ndelear Support Services

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SUPPLDIENTARY INFORMATION

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Report No.:

50-302/81-074/03L-0 Facility:

Crystal River Unit 3 Report Date:

December 9,1981 Occurrence Date:

November 16, 1981 Identification of Occurrence:

Meteorological Monitoring 175' Wind Diree n was not functioning contrary to Technical Speci'. cation 3.3.3.4.

Conditions Prior to Occurrence:

Mode 5 shutdown (0%).

Description of Occurrence:

At 1635, on November 16, 1981, during normal shutdown operations, the 175' wind direction unannel of the Meteorological Monitoring System was found not to be functioning properly.

Designation of Apparent Cause:

The cause of the 175 wind direction channel malfunction was a bad sensor and a broken connector.

Analysis of Occurrence:

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

Corrective Action

The sensor and the connector were replaced. The instrument was recalibrated and operability restored November 21, 1981.

An engineering investigation has been requested to determine and resolve a possible generic problem with the Meteorological Monitoring Tower Failure Data:

This was the fourth occurrence for the 175' wind direction channel,and this is the eighteenth event reported under this Specification.

/rc

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