ML19305E808

LER 80-033/03L-0:on 800411,while Core Component Pot 1-A Was Removed from Svc & 1-B Placed in Svc W/Diesel Generator 1B Out of svc,1-B Was Being Powered from Inoperable Shutdown Board.Caused by Not Verifying Generator Operability

ML19305E808
Person / Time
Site:	Sequoyah
Issue date:	05/15/1980
From:	Record D TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19305E806	List: ML19305E805 ML19305E808
References
LER-80-033-03L-01, LER-80-33-3L-1, NUDOCS 8005200462
Download: ML19305E808 (2)

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p.RC FORM 366 U. S. fv0CLE AR REGUL ATORY CO?.WIS$lora er 115 LICENSEE EVEfJT REPORT EXHIBIT A CoratRot otocic: l l l 1 1 1 l iPLEast PRINT oR TYRE Au r:toVIRED INFOR?.tATIONI

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- EVENT Of 5CRIPTIC?J AND pro 5 ASLE CONSEoOENCES Q ITT21 LCCP 1-A was removed from service and CCP 1-B placed in service with g

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o 3 t DG 1B out of sEv' ice. ii.C0 3.l'.2.3 requ' ires the charging pump being used l ioiy I to meet the boration flow path requir'ement, be powered from an Operable. l g;g i Shutdown board. With DG 1B out.of service, CCP 1-B was being powered, by ,

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Tinnassts Valley Authority

• Sequoych Nuclear Plcnt LER SUPPLEMENTAL INFORMATION SQRO-50-327/ 8033 Technical Specification Involved 3.1.2.3 Reported Under Technical Specification 6.9.1.13.c Date of Occurrence: 4/11/80 Time of Occurrence: 0940 CST Unic 1 Identification and Description of Occurrence:

CCP l-A was removed from service and CCP l-B placed in service with D/G l-B out of service. With D/G l-B out of service, CCP l-B was being powered, by definition, from an inoperable shutdown board, even though its normal and alternate supplies were operable.

Conditions Prior to Occurrence:

Unit 1 in Mode 6 with all fuel loaded and reactor head on and no Core Alterations being performed.

Apparent Cause of Occurrence:

Personnel did not verify D/G operable on the shutdown board from which the CCP was being powered during Mode 6.

Analysis of Occurrence:

There was no hazard to the public health and safety.

Corrective Action:

Personnel was instructed as to the requirements of LCO 3.1.2.3.

Failure Data:

N/A

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