05000302/LER-1981-034, Forwards LER 81-034/03L-0.Detailed Event Analysis Encl

Forwards LER 81-034/03L-0.Detailed Event Analysis Encl

ML20009E698
Person / Time
Site:	Crystal River
Issue date:	07/14/1981
From:	Baynard P FLORIDA POWER CORP.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009E700	List: 05000302/LER-1981-034, Forwards LER 81-034/03L-0.Detailed Event Analysis Encl 05000302/LER-1981-034-03, /03L-0:on 810617,during Hot Shutdown Operation, Lightning Strike Rendered All Meteorological Instrumentation Inoperable.Full Operability Restored on 810624
References
CS-81-152, NUDOCS 8107280369
Download: ML20009E698 (2)

LER-1981-034, Forwards LER 81-034/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3021981034R00 - NRC Website

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Mr. J. P. O'Reilly, Director Docker Nd. Q0$

U.S. Nuclear Regulatory Commission Licensee No7'UP Office of Inspection & Enforcement LER No. 81-034/03L-0 101 Marietta St., Suite 3100 Crystal River Unit //3 Atlanta, GA 30303 Occurrence Date:

I'h June 17, 1981 1

Dear Mr. O'Reilly:

Enclosed please find Licensee Event Report 81-034/03L-0 and the at-tached supplementary information sheet, which are submitted in accord-ance with Technical Specification 6.9.1.9.b.

Should there be any questions, please contact us.

Very truly yours, FLORIDA POWER CORPORATION S W Lee NuclearPlantManage%

atsy Y. Baynard Manager Nuclear Support Services JC/.rc l

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l General Office 3201 inirty fourtn street soutn. P o sex 14o42. st Petersburg. Fiorica 33733 813-866 5151

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SUPPLEMENTARY INFORMATION Esport No.-

50--302/81-034/03L-0 Facility:

Crystal River Unit 3 Raport Date:

July 14,1981 Occurrence Date:

June 17, 1981 lientification of Occurrence:

The meteorological instrumentation tower was struck by lightning. This created an event contrary to Technical Specification 3.3.3.4.

Conditions Prior to Occurrence:

Mode 3 hot shutdown (0%)

D2scription of Occurrence:

At 1536 during hot shutdown operation, a lightning strike rendered all meteorological instrumentation inoperable.

Maintenance was initiated and operability was restored at

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1730 to all instrumentation except the 175' windspeed in-dicator.

Full operability was restored at 1130 on June 24, 1982 Designation of Apparent Cause:

The cause of this event is attributed to lightning striking the meteorological monitoring tower.

This rendered all in-strumentation inoperable.

Analysis of Occurrence:

There wa. ao effect upon the health or safety of the general public.

Corrective Action

All affected instrumentation was repaired or replaced and the functional test was satisfactory.

An engineering investiga-tion will be conducted to evaluate the installed lightning eliminator system.

r ilure Data:

a This was the first lightning induced loss of all meteorologi-cal instrumentation and this is the thirteenth event reported under this Specification.

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