05000302/LER-1978-025-03, /03L-0:on 780418,175 Ft Wind Indication Lost. Caused by Worn Out Wind Speed Sensor Bearing.Sensor Renewed

/03L-0:on 780418,175 Ft Wind Indication Lost. Caused by Worn Out Wind Speed Sensor Bearing.Sensor Renewed

ML19319D039
Person / Time
Site:	Crystal River
Issue date:	05/10/1978
From:	Cooper J FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19319D036	List: 05000302/LER-1978-025-03, /03L-0:on 780418,175 Ft Wind Indication Lost. Caused by Worn Out Wind Speed Sensor Bearing.Sensor Renewed
References
LER-78-025-03L, LER-78-25-3L, NUDOCS 8003040959
Download: ML19319D039 (2)

LER-1978-025, /03L-0:on 780418,175 Ft Wind Indication Lost. Caused by Worn Out Wind Speed Sensor Bearing.Sensor Renewed

Event date:
Report date:
3021978025R03 - NRC Website

text

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g gat 1400 the 175 ft. wind indicacTon was lost contrary to Technical Specif1 g r. uni i cation 3.3.3.4.

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i g i o service within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

The 33 ft. wind indicator was available.

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v SUPPLDENTARY IhTORMATION 1

port No.:

50- 302/78-025/03L-0 2

cility:

Crystal River Unit #3 3.

Report Date:

10 May 1978 4

Occurrence Date:

18 April 1978 5.

Identification of Occurrence:

175 ft. wind speed indication was lost contrary to Technical Specification 3.3.3.4.

l 6.

Conditions Prior to Occurrence:

l Mode 6 refueling.

l 7.

Description of Occurrence:

At 1400 of 18 April 1978 both the digital readout indication and recorder indications for the 175 ft. wind speed indicator were discovered inoperable. An investigation revealed that the 175 ft. wind speed sensor bear 1.ig was worn out.

The wind speed sensor was renewed and reca11 braced using the Mececrological Monitoring System Calibration Procedure (SP-158) and restored operable within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

8.

Designation of Apparent Cause:

The cause of this event was due to a worn bearing in the 175 ft. wind speed sensor.

t 9

lysis of Occurrenen:

There was no hazard to the health and safety of the plant or general public as the 33 ft. wind speed indicator was operable and no gaseous releases in progress.

10.

Corrective Action

No corrective action necessary as the wind speed sensor for the 175 ft. elevation was renewed.

11.

Failure Data:

Second occurrence of loss of wind speed indication bu:: the first occurrence involving the 175 ft. sensor.

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