ML20086K471
| ML20086K471 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 07/03/1974 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20086K464 | List: |
| References | |
| AO-74-35, NUDOCS 8401270132 | |
| Download: ML20086K471 (2) | |
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A.E.C. P.cglon 1 Regulo.ory Operations Offico on uly -), 39,i.
peterence:
Licenco Hunber Er ' 4, t.-endment Un-M 1 Tcchnical specifr.
.1 n Table.?.1.1 Repcrt No.:
50-E77-7b-33 F et. ort Drit e :
July 3. 1974 O[currer.ccPa'e:
Jul; 2 l')74 Peach Latten Atcric Pever m,Latic,
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F.T. 1, Delto, Pennrylu n,.*
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v.*ent '" cstion of Oc currence :
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r.r e r lo s vr3 c uu r-ceran pret cu-e c,titch retraint f.rJnd to be leen cencervative than the linitint cafety cyctcn cettarr.
Conlitic:
prier to Occurrm
- rr_sc.or n c at 9 m, power.
Tnt a
cf Occurrrnce:
Dcr-[rhtif r'ng n outi:.'- in t ru..nt curvc ill.n c e tent of P.~-E-3 11A, r u.n conden er i
the tx.. act trip ir.put into the reactur proteciicn t77:tre,
% voeuub found to trip at 19.2 in. Hg.
Thic in 3 3 1% Eg la,a cor
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vitch sn thrin the Tccimical Specificaticn cetpaint of greater than or eqra to 6 La
+l Der-ignntion cf App,rr:nt Cause of Or.:rrence:
ht; int f ailure is attributed to instrument drif t.
Annivnic of Cccurrenc-:
Ph-2-5-ll A ia one el ar.nel in n one-out-of-two twice le-ic > arrt.nge-ent. The.
cetraint fsilure vauld not hs*.e p' nented the device fro :.nitinti*g n trip ci, nl.
ne prc'ection provido:1 by the other three channoin of condtnEcr P 3Lt L3fCt7*
1 racer, sculd have beer. Untiart.c;
- frc a ctudpoint of h erefore. thic occurrence hn-nininni cafety icplicationc.
Corrective Actic -
Tr.e t,ub
- e 't r, it ch un c i~~ edio t' rcc,11brated, chcched fcr cotFDin' repe:itibili +. ind ret err.03 ' c re:. ice, O u other three twitchen c nitoric?
condeneervi[cuumr.ndprovidingthe FWSinputewereit.gdiatelgtertcdnnd f0' LC
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Thic in 't$ie fo'artF cetroin*, f ailm of thin type of dcvice in thin cervice.
Other Eccyrrencco cre o C hllovc:
PE-2-5-11A on &drJ3ry S.197f P.%2-5-11D en Jar.usry 5, 1 9' PS-2-5-11A on 19118 IW4 After the t.a cetreint failures of TS11A, the device v,a repiceed in kir.d.
' This failure in the first cetpoint failure cf the replacem at d anc e.
m Very truly 70'.:c, s
'd, T. Ullrich, Superintend.cnt
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