ML19309H661

LER 80-035/01T-0:on 800421,during Pipe Hanger Insp, Discovered That Pipe Hanger from Previous Design Revision Had Not Been Removed from Auxiliary Feedwater Sys Pipe. Caused by Personnel Error.Pipe Hanger Removed

ML19309H661
Person / Time
Site:	Sequoyah
Issue date:	05/02/1980
From:	Ken Wilson TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19309H655	List: ML19309H654 ML19309H661
References
LER-80-035-01T, LER-80-35-1T, NUDOCS 8005130628
Download: ML19309H661 (2)

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got.it This configuration had not been seismically analyzed. This configuration I iTTil I could introduce unknown forces and stress uoon the lina and thereby I lo M i t endanger the safety of a safety-related system. I I

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l *ennessee Valley Authority Sequoyah Nuclear Plant LER SUPPLEMENTAL IhTORMATICN SQRO-50-327/8035 Technical Specification Involved: 6.9.1.12.1 Reported Under Technical Specification 6.9.1.12.1 Date of Occurrence: 4/21/80 Time of Occurrence: 0900 CST Unit 1 i,

i Identification and Description of Occurrence During a recent pipe hanger inspection, it was discovered that a pipe hanger from a previous design revisien had not been removed from an auxiliary feedwater system pipe. This constituted a hanger configuration which had not been seismically analyzed.

Conditions Prior to Occurrence Mode 5 and filling and venting RCS.

Action Specified in the Technical Specification Surveillance Requirements Met Due to Inoperable Eauipment N/A Apparent Cause of Occurrence Personnel error. Pipe hanger should have been removed.

. Analysis of Occurrence N/A Corrective Action The pipe hanger installed from the previous design revision was removed; therefore, the system should operate with no adverse effects as designed.

Failure Date

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! N/A

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