ML19317G327

RO-77-37:on 770416,emergency Feedwater Pump Tripped on Overspeed When Using Main Steam Power.Caused by New Governor'S Overly Slow Response.Feedwater Pump Left Lined Up on Auxiliary Steam & Engineering Dept Evaluated Governor

ML19317G327
Person / Time
Site:	Crystal River
Issue date:	05/09/1977
From:	Stewart W FLORIDA POWER CORP.
To:
Shared Package
ML19317G322	List: ML19317G321 ML19317G325 ML19317G327
References
NUDOCS 8002280934
Download: ML19317G327 (2)

Text

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GO l0lSl0l-l0l3l0l2l 01 60 l0l4l1l6l7 l774l 09 l 0l 5 l 0 l9 l7 l7 7b t EVENT DESCRIPTION o l In Mode 3 operation, during shutdown from outside the Control Room test, a start of the 7 UD t

@l Turbine driven EWP D'as attempted using Main Steam. The EWP tripped due to overspeed 7 00 -

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@ ( and was declared inoperable per Technical Specification 3.7.1.2.b. Redundancy was main-7 UD t

hl 7 ou entned with the motor driven EWP. Second event of this type. Pump was restored

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CAUSE DESCn!PTION  : ',

00 l Newly installed governor . lid not respond fast enough to operate the EWP with Main Steam 7 a9

@l 7 09 as power source. The EWP wcs lined up on Aux. St4am and declared operable.

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FACILn y O.

METHOO OF STAIUG  % POWCR OTHin STATUS DISCOVERY DISCOVCRY OCSCRiPTION 1

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LOSS OR DAMAGE TO TACILITY T Yl'E Of SCnJPTON NEl Wl10 N/A 7 00 l id:

PUDLICITY

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[, gl SUPPLEMENTARY INFORMATION s_/ -

1. Report No: 50-302/77-37 -

2. Facility: Crystal River Unit #3

3. Report Date: 9 May 1977

4. Occurrence Date: 16 April 1977

5. Identificatinn of Occurrence:

Failure to have two Energency Feedwater Pumps available and operable from two independent power sources contrary to Technical Sr.cification 3.7.1.2.b.

6. Conditions Prior to Occurrence:

In Mode 3 condition conducting the shutdown from outside the Control Room test. '

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7. Description of Occurrenca:

At 0830, a start of the Turbine driven Emergency Feedwater Pump was attempted using Main Steam as the power source. The pump tripped on overspeed and was declared inoperable. The pump was lined up on Aux-

) iliary Steam restoring operability.

8. Designation of Apparent Cause of Occurrence:

The newly installed governor did not respond fast enough using Main Steam as a power source.

9. Analysis of Occurrence:

There were no adverse safety consequences resulting from this occurrence as the OT Steam Generator levels were high. Redundancy was maintained by the motor driven EFWP which was determined to be available and operable, and the Steam D tven Emergency Feed Pump was operable manually on Main Steam 'and remotely on Auxiliary Steam.

10. Corrective Action:

Leave the Turbine driven EFWP lined up on Auxiliary Steam and an engineer-ing evaluation be made of the . governor.

11. Failure Data:

j This is the secon,d occurrence of this type (refer to LER 77-24).-

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