ML20027A134

LER 78-096/03L-0:on 780914,diesel Generator 1-1 Declared Inoperable & Required Surveillance Not Performed Until Next Day.Caused by Personnel Error

ML20027A134
Person / Time
Site:	Davis Besse
Issue date:	10/11/1978
From:	Marley J TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20027A133	List: ML20027A132 ML20027A134
References
LER-78-096-03L, LER-78-96-3L, NP-33-78-113, NUDOCS 7810160127
Download: ML20027A134 (3)

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Nic FORM 362 (7 778 LICENSEE EVENT REPORT (PLEAIE PRINT OR TYPE alt REQUIRED INFORMATIO4)

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7 8 60 61 DOCK ET NUMBER EVENT DESCRIPTION AND PRC0 ABLE CONSEQUENCES h Diesel Generator 1-1 was declared inoperable on September 13, 1978, at 0952 hours0.011 days <br />0.264 hours <br />0.00157 weeks <br />3.62236e-4 months <br /> for I rb T31 I The surveillance testing required by Technical Specifica- l y l preventative maintenance.

ti n 3.8.1.1 was not performed until September 14, 1978 at 0134 hours0.00155 days <br />0.0372 hours <br />2.215608e-4 weeks <br />5.0987e-5 months <br />. Upon discoveryj ro T"O l I o I s l I of the omission of the surveillance testing, the Shif t Foreman immediately arranged tol I

l o is l l perform the required testing. There was no danger to the health and safety of the Emergency Diesel Generator 1-2 was able to start and l g lpublic or unit personnel.

(NP-33-78-113) i 9 supply electrical power to the essential busses.

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4 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h The Shift Foreman failed toI g ]The apparent cause of the occurrence was personnel error.

I j,,,ygrecognize that the surveillance testing was required. The Shift Foreman inmediatelv l

m l arranged to perform the required surveillance testinz by completine the appropriate 5080.01 and ST 5081.01. This Licensee Event Report j y l sections of Surveillance Tests ST I

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TOLEDO EDISON' COMPANY DAVIS-BESSE UNIT ONE NUCLEAR POWER ' RATION SUSPLEMENTAL INFORMATION FOR LER NP-33-78-113 DATE OF EVENT: Feptember 14, 1978 FACILITY: Davis-Bes .a Unit 1 IDENTIFICATION OF OCCURRENCE: Failure to perform the required surveillance test-ing during inoperability of the Emergency Diesel Generator 1-1.

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Conditions Prior to Occurrence: The unit was in Mede' 1 with Power (MWT) = 2507 and Load (MWE) = 840.

s Description of Occurrence: During the review of the Shif t Foreman's log book on September 14,1978, at 0030 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />, the Shif t Foreman discovered that the required surveillance testing of Emergency Diesel Generator 1-2 was not performed when Emer-gency Diesel Generator 1-1 was inoperable.

Emergency Diesel Generator 1-1 was declared inoperable on September 13, 1978, at 0952 hours0.011 days <br />0.264 hours <br />0.00157 weeks <br />3.62236e-4 months <br /> for preventative maintenance. The surveillance testing required by Technical Specification 3.8.1.1 was not performed until September 14, 1978,' at 0134 hours0.00155 days <br />0.0372 hours <br />2.215608e-4 weeks <br />5.0987e-5 months <br />. Technical Specification 3.8.1.1 requires that when Emergency Diesel Generator 1-1 is inoperable, the following surveillance requirements must be met:

1. Verification of correct breaker alignments and indicated power availability ,

for each independent circuit between the offsite transmission network, and the onsite Class lE distribution system (ST 5080.01).

L 2. Verify that the Emergency Diesel Gener'ator 1-2 starts from ambient condi-tions and accelerates to at least 900 RPM 10 seconds (ST 5081.01).

These surveillance requirements are to be performed within one hour of the inopera-bility of the Energency Diesel Generator and at least once per eight hours there-after.

Upon discovery of the omission of the surveillance testing, the Shif t Foreman immediately arranged to perform the required testing. The surveillance testing was then repeated as required during the renainder of the inoperability of the Bnergency Diesel Generator 1-1.

Designation of Apparent Cause of Occurrence: The apparent cause of the occurrence was personnel error. The Emergency Diesel Generator 1-1 was declared inoperable on September 13, 1978 at 0952 hours0.011 days <br />0.264 hours <br />0.00157 weeks <br />3.62236e-4 months <br />. The surveillance requirements were not performed until af ter the discovery of the omission of the surveillance testing on September 14,1978, at 0030 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. The Shif t Foreman failed to recognize that the surveillance testing was required.

LER #78-096

TOLEDO EDISON COMPANY

! DAVIS-BESSE UNIT ONE NUCLEAR PC*w'ER STATION PAGE 2 0F 2 l

SUPPLEMENTAL INFORMATION FOR LER NP-33-78-113 t

Analysis of Occurrence: There was no danger to the health and safety of the public or to unit personnel. Had emergency power been required, Emergency Diesel Genera-tot 1-2 would have been able to start and supply electrical power to the essential busses as was verified by the surveillance testing performed on September 14, 1978.

Corrective Action: The Shift Fo eman immediately arranged to perform the required surveillance testing by completing the appropriate sections of Surveillance Tests ST 5080.01 and ST 5081.01. This Licensee Event Report will be distributed to j operations personnel as additional corrective action. The Diesel Generator Operat-ing Procedure SP 1107.11 has been modified (T-3279) to emph.ssize the performance of this surveillance requirement.

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i lailure Data: Previous failures to perform surveillance requirements on the Emergency Diesel Generators occurred on November 30, 1977 as reported its Licensee Event Report NP-33-77-101 and on August 15, 1978, as reported in Licensee Event Report NP-33-78-97.

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