ML19225A439

RO 2-79-32/1P on 790626:as Followup to IE Bulletin 79-02 Revision I,92 Class I Supports Identified as Possibly Failing During Dbe.Caused by Inadequate Design.Mods Will Be Implemented

ML19225A439
Person / Time
Site:	Peach Bottom
Issue date:	06/27/1979
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
790621, NUDOCS 7907190331
Download: ML19225A439 (2)

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. .T.ute 27, 1979 Mr. E=oyra M. Grt.r Offica of ineraction- and Inforna ent-Pest t " t I Ifnit?d Sts.t== ffuclemr Pachmtery' Cer :e.in f on 631 Perir. A v en' ta Ung of Prnasia, PA AUkO6 y,UME- BF.'RT,/.?j._E. 9CCUno.1rE - y]Qgo_!ITIcr3 K].

Confi r= sir:g 3, S. 'J.= L n h*=no * , nnwar= = t i c-t viih we. E. r: . Greenn=n, ,

N icn 1. United Stata. Wuel er Pantalatory C<ml=n ! -n on 6/76/T9

• Re ferette e t. Dr.*ket No. W .777 N* c h '++t + cgr thits ? a.-d 3 Technical Sp+-irle=* ton F=far-n ar 6 9.2.={p) iLevert 18o. 2-I4-32/1? "

Occtrrenea Da*at June 26,1079 -

Jgentirhntion of Jecury_enp.7 Is, Pn11**t7 ~? ?--9 2 "* ' 151"' l.

m - pnn--er nuto.t M 1. *n str',,i ci- s tr-Ti .,wt r*4 r- 57-- IP , - .- -..t ( t a- -in i, 76 am bein acM y?M; but tha Ma a ly

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The s e = = > === L e s uppa e t e are esther single su; pertg in a piping sygece or ere widely sep3 rated as in th- essa a f t h - o, t t 2 ev rgen c y = = rv i c e w*ter support s . The ainala HFf'I Support in = =ch mit is for p iping **

• oc i a t *d with the test flew p+th which is isointed f m the inicetion ficw p=th e= cept du rin g ins ting and L

• ent **st i co f f y 6*nlat-d kr initintlan occurr*

during t* . .ing. OP- o f two **n r F*n c y serv ic e wat?r systM Supports on IFii t I and the on. on I N'i t 3 er* 1e-eated on th- ** rv ice wat er side of a normally clo*ed and t od ed w acu s t velve cennect:ng t bc m rg-n cy ge rv i ca water discharga med = erv 6 cn water dischse;r. Faelure in this location wmild an! in te r fe r w i th eme rg ea n aarv it c werer dativerv. The n*b-r Unit 2 ==

• rgan cv **evice water g u:-w rt im suser.)ated with one of the twa r='Nad *n t e v er.s i - leop* wbsch could be 6

• o bs t ad i f n a c e = = ri ty . The einsta CN su;part on and un i. e 15 w g s c<-i S t nl wi t h si single subsyst***

and la not en piping cannon to tb two wuh s v e t e -S . The *tt' Ele derwell i rsert t n. system support is nn piptnx at *

• igai fic 9nt li* tant- *M feveral ri g id wurpo rts cust bos.rd of the anter :--t=*t-m v a l v e wh i c h

• I rw's wi t h t ha inner 1901stion valves is r*a rm s l l y c l e,cd. Th ** t,le fi c i en c i e s ermutitute 3**s t h an ene p= re-e t of the tot =1 suppoets enslyted. The c a lcu l at ions i mathew! used is con *

• rv t t iv a in that ett s t ra , s a r?d lo=le ate co=hiesad to edi t si n the totgi load dur i n g tha D E., Ca l e's i s t w n s indicste t h at thee.

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• i ng b a s i e a a rt h.m a l e lhe Ope rat s em s arid S a fe ty hview Conwittea %== eeviewed this data snd concital** that =mfc epe ra t i o - caa enntinoa un t i l awwii fi c wt i oc a can be e s =a n l e t e 3 l**ign of rhms evdification= h == heaun mad aniific=tlane wi11 he creviate wath6n two wa.ks. In light o f ther co nt a rv at i v a nature o f the c.aiculat ten aM the very low proh mbi l i ty of e ge n saw even,e occarring during the sho rt rep a s r ,** ri nd , tha OLM Cr=== i t t ee hss conel w3ed ebat thesa de fi c i-nc i es

><ve is =inie=1 ==faty s ign i fi c an ce and that the plant can cent imw i* rat ion.

Correc t _ve Actiert:

The in=tequate Supports will te ct trected opedit t ous ly but in no case not. t h e e, two w-ek*.

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