ML19210A161

Discusses Even Rept 76-17/990 on 760513.Chemical Cleaning Sys Piping May Cause Excessive Stress in Reactor Bldg Penetration During Seismic Event.Caused by Inadequate Support.Tests Show Stress Falls within Limits

ML19210A161
Person / Time
Site:	Crane
Issue date:	05/26/1976
From:	Arnold R METROPOLITAN EDISON CO.
To:	James O'Reilly, Reid R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I), Office of Nuclear Reactor Regulation
References
GQL-0778, GQL-778, NUDOCS 7910240886
Download: ML19210A161 (2)

Text

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ON 5/13/76 CONCERNING AN INADEQUATELY SUPPORTED CHEMICAL CLEANING SYSTM PIPING ASSOCIATED WITH REACTOR BUILDING PENETRATION No. 105.

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POST OFFICE BOX 542 READING, PENNSYLVANI A 19603 TELEPHONE 215 - 929 3601 GQL 0778

'5 May 26, 1976 Director of Huelear Reactor Regulation S

'4 Attention R. W. Reid, Chief

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U.S. Nuclear Regulatory Cc==1ssion Washington, D.C.

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5 Mr. J. P. O'Reilly 7

g Office of Inspection & Enferce=ent, Region 1 U.S. Nuclear Regulatory Co==ission

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631 Park Avenue Of King of Prussia, PA 19h06 Gentle =en:

Three Mile Island Nuclear Station Unit 1 (ThiI-1)

Docket No. 50-289 Operating License No. DPR-50 Event Report ER 76--17/990 On May 13, 1976, Mr. J. J. Colitz (TMI-1 Unit Superintendent) informed Mr.

Lee Spessard (Region I, URC) of a situation which we felt may have been reportable in accordance with Technical Specification 6.9 2.A.(9).

It was suspected that the Chemical Cleaning System piping associated with Reactor Building Penetration No.105 was inadequately supported and could sub, ject that penetration to excessive stresses during a seismic event.

Seismic and deadload analyses performed by Gilbert Associates, Inc. have shown that stress values vould be well within the code allowables and that no additional supports vould be necessary.

This situation, therefore was not reportable.

.J Sincerely, i

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