ML19209B429

RO 3-79-26/1P:on 790904,failure of Pipe Support Anchor on HPCI Pump Discharge Piping Noted.Undetermined Factor Caused Overstress Resulting in Failure.Vendor Presently Conducting Tests to Determine Optimum Method of Repair

ML19209B429
Person / Time
Site:	Peach Bottom
Issue date:	09/05/1979
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
References
NUDOCS 7910090703
Download: ML19209B429 (2)

Text

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o PMIIADEt.PHIA IIKTRIC COMPANY f

Peach Dottoes Atossic Power Se st. inn

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, _ 5ert e=+=r 5, IM9 Mr. Durce M. Crier Office of Iss wctitm em! Enforcement Region 1 Dmited State * %ctese segulatory Coeurission ,)Q @ hh k, 631 Park Arentw Eing of Prussia, PA 19406 'UUll UH U j [1l SERIEE"T:

REPUtT.1t3LE OCU1RRENCE - PRCBFT NOTIflCM If*e ra-Firming W. T. Ut1 rich's conversation with Mr. Gre-nmn, Resitm 1. Wited States NacIser Reguistory Commission esa Septeobe r 5.1979.

Reference:

Decket W.34-278 Peech Acttc*e meit 3 -

Tochesica.1 Specification

Reference:

6. 9. 2. s (9J .

7 ni No. 3-79-26/1r Ocearrence Dete: Septesber 4, IF19 Identification of Ormrrence: .

PnAlmre of piping support macher en the Ukit 3 W r==r discharaw piping.

Om Septembarr 4 197e. the failed. sachor was discevere! and repart-d to t!=

persennel iwvoIved with the hartger inspection pragnm. It m tbe handIed in accordance with the procedures developed for re ptm-e t o N i t-t .7 N -112 . i Asocher 3-23 CDN-525, w8 Ich guides a portion of the ri iF M Fe*w-e- t ha FCI' t

puey alischarge xnd the **0-20 vaAve (which is upstrene e fe.,tetar !!ne A1, asas identified .ns a railure. 71ee anchor guide

• thi* sectirm of piping wtddt mer be isoisted try the closure of MD-20 and/or %I9 downstraam of the haugar seen and MD-17 and ten-57 out the upstream side.

. Apparent Causse of Occurrence:

A Rechtet anatyai? Endicated that the anchor was over_-st ressed, however, csweelusions as to the oca. at causa of failure have not yet bem drawn.

Analysis of Occzarrence:

Failure of this ar*chor may not have resulted in failure cf the supportel piping systeem during a setsute event. Safety significance is slaisual because of the syntisbility of redundant IECS systems. .

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Cctrrectire Action: l ,t%TJW Fellowing tbn motification of the failed anchor. Mechtet was contacted to 1910090 703 J

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determine the optimum repair method. Presently, repain are beiwa W e to 11 T anchor. Redundant EGS equigunent is being tested to prove opern-bilith, Prowlaus Failures:

2-79-33/IP 2-79-35/IP O@ y 3-79-19/IP 3-79-23/IP l jj l

dI h Uj fI/jf J ~

3-79-25/IP . ..

Very emuty ye, F w4~( .

W. T. Ullrich, Superint m<fet

_Beeck Detton Atomic Tbwer Stati,on_ .

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