ML20037C885

RO SQRO-327/80196:on 801211,in Mode 5,during IE Bulletin 79-14 Review,Discovered That Thermon Heat Transfer Cement Could Result in Pipe or Hanger Failure.Caused by Failure to Consider Effect of Cement on Supports.Cement Removed

ML20037C885
Person / Time
Site:	Sequoyah
Issue date:	12/12/1980
From:	Ballentine J TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
IEB-79-14, RO-SQRO-327-801, NUDOCS 8103060798
Download: ML20037C885 (1)

Text

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TELECOFY TO WUtC h-w 12.1980 7;

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r Zegion II 101 Harietta Street, BW Suits 3100 A*1==*m, Georgia. 30303 N

squo-50-327/a01ss mayorted under raewe-=i specife-ei s.p.1.12.1 i

. Date of Occurrenca:

12/11/80 IIme of necurrence 1615 (c) i Techfemi Q--IF4

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I Coriditio-to Frior to Occurrence wrmfa 5. ECS pressure 300 pais and Tavg.178 Degrees F 1

Identificatios_and Description _of occurrence Notification was received that A=e*=r the IER 79-14 reyfew it was discovered thst The host transfer cavant inse=71=a in the area of pipa hangers far process pipirs cont =*=i== barated water coeld reamit in pipe at hsuger failure.

Whes installat, the cement is pliable and fills henger pipe cime2ces, when dry; the cement is very hard restricting any relative movement between pipe mai hasser.- Pipe stress could increase and/or support failure cos3d ramalr.

There were eleven safety-related hangers affected sa the SIS. CTC5, and waste disposal systems.

hpar m t Caase of Occurrenen The installation of heat tranafar ccaurnt was made without regard to the effect on pipe supports. There were no q& pr=-=d-w for the app 14e=Fean or control of this material.

. Other E-lated Events Ness l

corrective Action Taken or Planned The cement has been removed from piping in the vicinity of the hangers and Egorary inmalmf-ing material 1ASem1Tast as==*==mery.

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