ML19326A056

LER 78-081/03L-0:on 780719,required Surveillance Testing on Diesel Generators Not Performed.Caused by Procedures Inadequacy.Mod T-3029 to ST 5081.01 Written & Performed on 780720,verifiying Sureveillance Requirements

ML19326A056
Person / Time
Site:	Davis Besse
Issue date:	08/15/1978
From:	Beeler T TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19326A054	List: ML19326A053 ML19326A056
References
LER-78-081-03L, LER-78-81-3L, NUDOCS 8001310631
Download: ML19326A056 (2)

Text

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NRC FORM 356 (7 77)

LICENSEE EVCNT REPORT

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• CONTROL SLOCK: l l l l l l l (PLEASE PRINT On TL . ALL REQUIRED INFORMATIONI 1 6 o al al D 3 si 1 @l e l e l -l 0101 N !NUMSER P I F l- l 0132$l@l26 4 l1 UCENSE l111 TYPEl1 JO l@l57 GA7 58 l I@

? 9 UCENSEE CODE 14 15 uCENSE CCN'T l o i f l' 7 4 seuRCE lL l@l 0l 5 l 0l -l 013 l'4 l 669@l 0 l 7 l 119 l 7 I 8 @l 018 l'1 I 8 I 718 60 6: QCCKET NUMB ER 64 EV ENT 0 ATE 74 75 REPORT QATE dQ EVENT DESCRIPTION AND PROBABLE CCNSECUENCES h l During an NRC on site audit on 7/19/78, it was discovered that Surveillance Reauire- l' Io12l prT31 I ment 4.8.1.1.2a4 was not adequately verified by surveillance tests. The diesel was l l o ,4 ; l started and tested by the surveillance test but the time to 900 rpm was not neasured l g ;by the test. There was no danger to the health and saf'e ty of the public or unit per- l 1 o # s i i sonnel. Had emergency power been required, the diesels would have been able to start l l o l 7 l l and supply electrical energy to the essential busses as verified by the monthly tests. l l

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• 42 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS I

1 i ; o l l The cause of this occurrence was a procedure inadequaev. A nodification was written i,,ii1and perfor=ed at 1915 hours0.0222 days <br />0.532 hours <br />0.00317 weeks <br />7.286575e-4 months <br /> on July 20, 1978, which verified the surveillance recuire-I l

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F 8 9 to Tom Beeler 419-259-5000, Ext. .253 o DVR 78-128 NAME CF PREPARER PHONE: )

e TOLEDO EDISON COMPANY DAVIS-BESSE UNIT ONE NUCLEAR POWER STATION SUPPLEMENTAL INFORMATION FOR LER NP-33-78-97_

.DATE OF EVENT: July 19, 1978 FACILITY: Davis-Besse Unit 1 IDENTIFICATION OF OCCURRENCE: Failure to perform required surveillance testing on Diesel Generators Conditions Prior to Occurrence: The unit was in Mode 3, with Power (MWT) = 0, and Load (MWE) = 0.

Description of Occurrence: During an NRC on site audit on July 19, 1978, it was discovered that Surveillance Requirement 4.8.1.1.2a4 was not adequately verified .

by ST 5081.01, " Diesel Generator Monthly Test". The surveillance requirement specifies verification that ene diesel starts from ambient condition and accelerates to at least 900 rpm in 3.10 seconds at least once every 31 days on a i staggered test basis. The diesel was started and tested by the surveillance test but the time to 900 rpm was not measured by the test.

O Designation of Apparent Cause of Occurrence: The cause of this occurrence was a

( procedure inadequacy in ST 5081.01, " Diesel Generator Monthly Test". The proce-t dure referenced the Technical Specification requirement, but the measurement of acceleration time to 900 rpm was omitted.

Analysis of Occurrence: There was no danger to the health and safety of the public or to unit personnel. The diesels start and accelerate to 900 rpm typi-cally in less than 5 seconds. The intent of the surveillance requirements is to measure the time to insure that the diesel is up to speed and' ready to be syn-

'- chronized. Had emergency power been required, the diesels would have been able to start and supply electrical energy to the essential busses as verified by the monthly tests.

Corrective Action: A modification (T-3029) was written to ST 5081.01, and per-formed at 1915 hours0.0222 days <br />0.532 hours <br />0.00317 weeks <br />7.286575e-4 months <br /> on July 20, 1978, which verified the surveillance require-ments. This test will now measure and record the time required by the diesel to reach 900 rpm. ,

Failure Data: One previous failure to perform surveillance requirements on the diesels occurred on November 30, 1977, as reported in Licensee Event Report NP-33-77-101.

4 m LER #78-081

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