ML19270H431
| ML19270H431 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 07/25/1979 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | |
| References | |
| NUDOCS 7908130461 | |
| Download: ML19270H431 (2) | |
Text
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]($f (2.'W n Y2 N PHILADELPHTA EJ.ECfRIC COMPANY 2-Peach Bottone Atouic PoEscr Station-Delta. Pennsylvania.
17314 July 25, 1979 Mr. Boyce H. Griwr Office of Inspectiers and Enforcewma Regiort 1 United. States Nucleme Regulatory Commiessionc 631 Park Avenue King of Prussia, PA 19406 SUEJECT: REPORTABEE OCCURRENCE - P310FT NETTIFICATIDN; Confirming W. T. Ut 11 rich's c'onversation with. Mr. Csqpisteet,. Region 1 United States Nuclear Regulatnry Commissiorm on. July 25, 1979.
Reference-Docket No. 50.'I76 Peach Bottous' Unit 3 Technical' Specification.
Reference:
6.9.2.a(9)
Report No. 3_79-23/IP' Occurzence Date. July 2% 1979 Identificaticem of Occurrencec Failure of enchor support arr emergency service watem piping. in 35 MHit rope.
The above failure was idenelified a+ a resutt of a piping. support inspeer.Lorm progran being conducted in accordance with IE Bulletin: 79-07.
Thi$
laspectiort identified one bolt on a four anchor support pisste *Aich would not torque property.
Additf orrally,, one bolt wasJ found with a ~ cracked head.'
Failure of these twon boltw cet one support piare has: been, evaluated as a support failure.,
4 parent. Cause::
M Wmng-Impropen insextlatiors.
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Analysis of Occurrence::
ne supporte pisec ar4 horst wh6sh, fakled werer part: of an cuergency sesvice water line piping support The energency seruvice water line (3" disuserer) is associated wi.thi rooms cooler.w in the Unit J
'B' RH2 room.
Thee piping involved is orr the outlet side of the room coo-ter.
Possible fai leste of~
this pipe during a seismic. event could Iwad to floodi,ng of one RHR room.
Probability of such an occurrence appears to be very Acass.
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Corrective Action -
Thr two failmt anchors-and t>olts have been replaced AII four bolts Ier this assemb4 c werer satisfactedsy torque tested.. Corrective action 9
is couplete Previous FaElures::
2-79-33/IP 2-79-3F/IP 3-79-19/1P g_
J-79-25/1F Very truly your s y;/ N2-_
W T. Ullrisch+ Superknemndent:
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