ML20085L633

AO 75-267/75/13:on 750519,I-B Engine of I-A Standby Diesel Generator Failed to Start.Caused by Failure to Transmit Info That Engine Was Out of Svc to Adjust Overspeed Switches

ML20085L633
Person / Time
Site:	Fort Saint Vrain
Issue date:	05/27/1975
From:	Brey H, Craine W PUBLIC SERVICE CO. OF COLORADO
To:
References
AO-50-267-75-13, NUDOCS 8311020145
Download: ML20085L633 (5)

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(,/ 'v' REPORT DATE: 'May 27, 1975 OCCURRENCE DATE: May 19, 1975 ABNORMAL OCCURRENCE FORT ST. VRAIN NUCLEAR GENERATING STATION PUBLIC SERVICE COMPANY OF COLORADO l P. O. BOX 361 PIATTEVILLE, COLORADO 80651 REPORT NO. 50-267/75/13 PRELIMINARY IDENTIFICATION OF

• ' OCCURRENCE:

IA D-C unit failed to start during the weekly surveillance test of' week

1. 21 (S.R. 5.6.1. a-w)

This is an abnormal occurrence as per section 2.1 paragraph (f) of the tech-nical specifications.

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CONDITIONS PRIOR TO OCCURRENCE: Steady State Power Routine Shutdown Ilot Shutdown Routine Load Change X Cold Shutdown Other (specify)

Refueling Shlutdotm Routine Start.up 8311020145 750527 PDR ADOCK 05000 S

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O o Ptgs 2 The major plant parameters at the time of the event were as follows:

RTR, 0 __MWth Power ,

ELECT, 0 _ MWe Pressure' Psig Secondary Coolant F

Temperature Flow _#/hr.

Paig Frimary Coolant Pressure _

Temperature F Core Inlet F Core Outlet s

Flow #/hr.

Plant shutdown prior to re-start of B-0 low power physics testing.

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.o DESCRIPTION OF OCCURRENCE:

1-B engine (K-9204X) of I-A standby diecel - generator failed to startThe engine crankea prop during routine weekly survelliance testing.

(according to control room indication) but declutched after the exhaust gas temperature had not reached set-point in 30 seconds.

APPARENT CAUSE OF X Procedure OCCURRENCE:

X Other The engine had been out oI service on Friday, May 19th to adjust the over-Since the engi with speed switches-(mechanical and cicctrical). condition, itfic- was icft available to the caution that it was not returned to service per the technical speci ations, since the settings on the switches were not finalized.

This information was lost, between the verbal communication and the log entries, and the surveillance test was run on schedule, resulting in an engine failure.

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o ANALYSIS OF OCCURRENCE:

! The failure to have available to the operator a positive means of identifying l the status of the engines led to the abnormal occurrence. The failure of the

engine to start is not considered abnormal because of the uncertain condition

• of the overspeed protection switches.

This is an abnormal occurrence per section 2.1 paragraph (g) of the Technical Specifications.

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o CORRECTIVE ACTION:

A system of identifying to the operators, the status of all equipment (especially equipment not having a clearance issued, since a clearance board is aircady provided), is being developed and will be initiated as soon as practical.

FAILURE DATA /SIMILAR REPORTED OCCURRENCES:

Abnormal Occurrence No.12 is of a similar nature, though not exactly the same.

l PROGRAMMATIC IMPACT:

None CODE IMPACT:

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RECOM1 ENDED: APPROVED:

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e Q% l War Craine) Mdhitenance Superviser II. Larry Brcy, Superintend \*nt-Operations .l

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Fort St. Vrcin Nuclear Cencrating Fort St. Vrain Nut. lear Concrating S trition Station 9 4 4

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