ML20062G289

/01T-0 on 781218:during Routine Oper,Discovered That AHF-14C Was Overloaded & Was Secured to Attempt to Balance Air flow.AHF-14C Was Tripped During Restart & Cause Was Attributed to Not Allowing Sufficient Time for Restart

ML20062G289
Person / Time
Site:	Crystal River
Issue date:	12/19/1978
From:	Cooper J FLORIDA POWER CORP.
To:
Shared Package
ML20062G287	List: ML20062G283 ML20062G289
References
LER-78-065-01T, LER-78-65-1T, NUDOCS 7812270293
Download: ML20062G289 (2)

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- . a e 4** SUPPLDfENTARY INFORMATION Report No.: 50-302/78-065/01T-0 Fccility: Crystal River Unit #3 Report Date: 19 Dece=her 1978 ,

Occurrence Date: 18 December 1978 Id:ntification of Occurrence:

Inoperability of Auxiliary Building ventilation fan AEF-14C contrary to Technical Specification 3.7.8.1.

Conditions Prior to Occurrence:

Mode 1 power operation (98*).

Description of Occurrence:

i At 0600, during routine operation of AHF-14A and AEF-14C, it was discovered that AHF-14C was overloaded and secured to attempt to balance fan air flow.

Redundant fans AHF-14B and AHF-14D are out of service for maintenance. AHF-14C tripped during the restart attempt. AHF-14C was restarted and returned to service at 0610.

Dasignation of Apparent Cause:

The cause of the event was attributed to not allowing sufficient time for the overload condition to reset before attempting to restart AHF-14C.

Analysis of Occurrence:

There was no safety hazard to the plant or general public. AHE-14A remained operational and AHF-14C was promptly returned to service at 0610.

( rective Action:

Operations personnel were instructed in fan operating characteristics.

Failura Data:

Five previous reportable occurrences, but first occurrence of this type.

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