ML19225A456
| ML19225A456 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 06/22/1979 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| RO-5-79-19-1P, NUDOCS 7907190367 | |
| Download: ML19225A456 (2) | |
Text
e Pist1JaliiLPl!! A ELECTRIC 'CCHPANY E.caen Duttom Art.an c Poa-or. Station D elt.a. Pennsylvania 17314 June 22. 1979 Mr. Duyc e 14. Lcier Office of Inspection and Enforconscent t%cgion i United M ates Nuclear degulat sry.Constission n 31 t'aa L Aw criue ida g of Pru a t a, PA 19406 NJtuECT:,H1fytALTA'st.E (40)H RiddCE - PFL*.Pr MJrIFICATI(N Confirating av. T. U11 rich 's conversation with Mr. Creen: san, Region 1, UnAted St. tem iclea r.4cgu14 tory Cceamassion on 6/21/79.
h ference:
Occhet No. 50-275 Peae:1 150tt oct Unit 3 Ts eenn ical Spectiteation Refe rence:
- 6. 9. 2. a (.9)
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Repo rt 'en. 3-79-19/IP g % {r w
Occurrence Date:
Jiato 21, 1979 7y ident.ifAcat ton or. Occurrence:
As part o f t he seGmac.upport inspecti'on pcogram requ1Yed by IE Bul~1.:cin 79-02, mia anchor associated with the RCIC paping uds found to have two bo-its n.hich could not be pra.,ye rly t oragued.
An Engineering.atalys.ls
=45 performed and a detersanat sco ad41e th er, in the As found. condition, the 1 anchor would not t>c capable or =athatenling comban4 tion of operac2ng and seismie loads 6.ithout 4
o ve r sr t.c a m ing, the.uther anchor bolt.s.
1otlo ing the ident ificist ion of the two loos e conc ret e insens, Bechtel Cocporatii analyzed th23 s upport in order to deteninne tra load carrying cath bility.
This mswalysis cunc luded that. wi.ta all si A bolts in place, t wo bolts have a sa fet y Sctor of 1.5.nd two b.e l t > h w e a > a fet y t.ac t o r o f 5. ti, bas ed on m anuf,.ct u r et ' s pubi t s n ed
.ultaa r.e load. ;
A3, ipa rcht C use of -tk.:cua.r ence:..
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-l=prope r in s t al l at z un ur waL1 anchor tolt.s.
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,Aasm i p t s ut tR e u r s e ra c e ;
T., J.e r e, the.acliar pl te insp ction pr s es ha6 cump let ed.t ? an cho r pl.s t e r
lutettuns.
A ti t s i s t he un ty i d en t i f ie d.e nt.ho r s up p.s ai f.s i l ti re to des t e.
The co -s i n d e r e> f ( !i a* #CIC wall asichurs h.s v e teen. tound to be a c c ept a ble.
'i he as lu st.a l l es!.aic hu r pl a t e da m s h
.e sufttclent in..4 c*grying
, spa c it y with all ja g ss uc t'If 18131 a l icd T u t j t ha)(.ind T he olW! r It $ 1sg.19d,ie L 2s bt I t*
lo.A aI3 s' e mpe as t e f t
- s applied rec.use o r c h,-
lu= ps obabilit y o f
.s s ci-a u A c cw ent, this d e fc(.c h a.s sm ? n i aw 1 3.a!ct f 314, t:111 am o.
79071 90367 326 E
3-79-M /P
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G m cive Action:
The de fect i v e ~ wa l l. an cho rs h tve h++w mved an d v7.s c ed w i t 1
h new wchors.
This retums the support to its original capabiIity.
Whm the wall anchor miesign i s etmp i st ad hv **c h+ = t. W i fi r = r i en s will h-ande to increase the load carrying capability to provide the de.ign rmpi "
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bolt safety factor.
Previons F3iluras :
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