05000265/LER-1981-011-03, /03L-0:on 810608,during Routine Maint,Diesel Generator 1/2 Was Removed from Svc Prior to Demonstrating Diesel Generator 2 Operability,In Violation of Tech Spec. Caused by Personnel Error.Personnel Reinstructed

/03L-0:on 810608,during Routine Maint,Diesel Generator 1/2 Was Removed from Svc Prior to Demonstrating Diesel Generator 2 Operability,In Violation of Tech Spec. Caused by Personnel Error.Personnel Reinstructed

ML20009B044
Person / Time
Site:	Quad Cities
Issue date:	07/01/1981
From:	Kaeppel F COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20009B036	List: 05000265/LER-1981-011, Forwards LER 81-011/03L-0 05000265/LER-1981-011-03, /03L-0:on 810608,during Routine Maint,Diesel Generator 1/2 Was Removed from Svc Prior to Demonstrating Diesel Generator 2 Operability,In Violation of Tech Spec. Caused by Personnel Error.Personnel Reinstructed
References
LER-81-011-03L-02, LER-81-11-3L-2, NUDOCS 8107140699
Download: ML20009B044 (2)

LER-1981-011, /03L-0:on 810608,during Routine Maint,Diesel Generator 1/2 Was Removed from Svc Prior to Demonstrating Diesel Generator 2 Operability,In Violation of Tech Spec. Caused by Personnel Error.Personnel Reinstructed

Event date:
Report date:
2651981011R03 - NRC Website

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8 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h While performing routine maintenance on the Station Diesel Generators, the 1/2 Diesel l l 012 l l Generator was removed f rom service prior to demonstrating the 2 Diesel Generator l

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operable. This is in violation of Technical Specification 3.9.E.2.

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,gg,,g consequences are minimat,because the 2 Diesei Generator was fully operable at all g

times while the 1/2 Diesel Generator was out of service.

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10181I 60 SYSTEM

CAUSE

CAUSE COMP.

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10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPOnT REVISION LE R EVENT YEAR REPORT NO.

CODE TYPE NO.

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43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 11101l The cause of this occurrence is oersonnel error.

The monthly maintenance procedure f

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has been reviewec and no changes were deemed necessary. The Operations personnel '

l have been re-inst ructed on this procedure.

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b h Chl i G 83 7

8 9 to is 44 45 PEfh0NNEL EXPOSURES i

NU'NJ E F4 TYPE DESCRIP TION l

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8 9 11 12 13 PE f tOONN E t. IN JunlES NU?f Mf.It DEscinP TION l

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LER NUMBER:

LER/R0 81-11/03L-0 ll.

LICENSEE NAME: Commonwealth Edison Company Quad-Cities Nuclear Power Station 111.

FACILITY NAME: Unit Two IV.

DOCKET NUMBER: 050-265 V.

EVENT DESCRIPTION

The routine monthly preventive maintenance for the three Standby Diesel Generators was being performed at the time of the occurrence.

On June 8, 1981, the 1/2 Diesel Generator was started and demonstrated to be operable.

This permitted taking I Diesel Generator out of service.

1 Diesel Generator was taken out of service, preventive maintenance was performed, and the Diesel Generator was returned to service. The maintenance team then went to the 1/2 Diesel Generator and had it removed f rom service, it remained out of service for approximately 30 minutes for preventive maintenance. At that time, the limiting condition for operation in Technical Specification 3 9.E.2 was exceeded. The 1/2 Diesel Generator was taken out of service without demonstrating that the 2 Diesel Generator was operable.

The 1/2 Diesel Generator was returned to service, started, and demonstrated to be operable. _Then the 2 Diesel Generator was removed f rom service, preventive maintenance performed, and returned to service, started, and demonstrated to be operable.

VI.

PROBABLE CONSEQUENCES OF THE OCCURRENCE:

The 2 Diesel Generator had previously been started and loaded on May 26, 1981. There were no operational problems found while the 2 Diesel l

Generator was out of service for preventive maintenance.

Immediately after j

the routine maintenance of 2 Diesel Generator, it was started and

^

demonstrated to be operable.

The 2 Diesel Generator would have started if needed while Diesel Generator 1/2 was out of service. At no time during the maintenance of the Diesel Generators was there more than one Diesel l

Generator out of service. The consequences of this deviation are minimal, and safe operation of the plant was not affected.

Vll. CAUSE:

t l

The cause of this-occurrence is personnel error. The Shi f t Engineer made l

an outage report, QOS 6600-04, for the i Diesel Generator at the time of removing the 1/2 Diesel Generator from service, but failed to also specify the 2 Diesel Generator.

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Vill. CORRECTIVE ACTION:

This is the first occurrence of failure to demonstrate operability of a Diesel Generator during monthly maintenance. The Unit Two Operating j-Engineer has instructed Operating personnel in the Diesel Generator monthly maintenanc2 p rocedu re.

The Unit One Operating Engineer has reviewed the l

procedure for removing Diesel Generators f rom service wi th the Shi f t Engineer.