ML20086K935

Telecopy AO 74-6:on 740228,setpoint Shift Found on Switch LIS-2-2-3-101B.Caused by Inability of Switch to Hold Precise Setpoint.Calibr Checked,Setpoint Reset & Checked in Accordance W/Surveillance Test

ML20086K935
Person / Time
Site:	Peach Bottom
Issue date:	03/01/1974
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20086K932	List: ML20086K928 ML20086K935
References
AO-74-6, NUDOCS 8402070082
Download: ML20086K935 (2)

Text

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P.r. Jarec P. O'keil)y, D1roctor Pr.ited Stntes Atoric Iberry Oce.-iccion .. kh.;.4 Q:: 'l 4t' Directorate of Replutory Operatio:.s JC;D:. ,-

'631 Pr.rk Ave.ue h/T '.M ~.1 T.ing of Prut-od% Penncvirnnit. 19kD6  %$[kT.:

renor-d Occurrtnee 24-llour );otification Mf Sub$eet:

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Cor.firtir.r ry cor. verr.ntior, with Pr. R. A. pei), A.I:.C. I;rgien 3 Reguhtory [dt [.s..d; operatior;c Of fice or. P.ntch 1,1974 JTg.ht vg qg y 9,

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Fcport No.: F>-277-74 6 g.g.3%n3 7.eport Daie: 3/2/74 4 gt c .fi Decurrenee Datc: 2/28/74 Q,N. :p R.:

Icei3ityt Peach botton Ato:se Pover Station - Unit 2 py.T y 'f t.T" R. D. 3. Delta, Penncylvknit. 1731 . ' reg.;.;( 1 4.c .,: :fu. . ;g , :1 ,..,

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%entificatior. of Occurrencc:

Setpoir.t shift on LIS-2-2-3-1DE. t. itch #3 vhich providen a Renctor liich  %;g@. f'9V.N. '

seter level turbine trip input to the H.P.C.I. and the Reactor Peed Pep Turbinec. 3; . oh.3 '.";g

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Oonditio:.c Prior to Occurrer.ce:. .=IfCW c I?eactor r.t approxim-te3y ?M p:xer and etable. 3 kg{.e:}:

7;. y s,n.,z Dec:riptfor of 0;currer.cc: Q4W+1 Daring iretrutent curvei32er.ce testir.c, L3E-2-2-3-30)E. c. itch #3 trippe4 M-i.3 , '*

st approximtc;y 46.5" Reactor Vater Level instead of $ 45" Reactor d[$M,.; ft Vottr level sc crecified ir. the icehnical Specifientier.s. N.f.: ;.. : . 2

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htcignation of Apparent CEuce of Occurrer.ce: $ 5j 'fSh ; .

lubi)ity of Exitch to hoM prcedce retpoint. No specific probh hsc d[hKh.'

been identified. '9. H, , a; 6 .'.:de i

% ,4 Ana)ysis of Occurrer.cc: (

..ylYpqf . .. 3 Setpoint shif t of the cabject rneitchec vould not hsve defested the h gic _ fg6...

to picduce the reoudred netions. Operobie tuitcher vould have eaur.+d M.M -ag tript.r.t the' proper cetpointe. Ectpoint chift vac cinor ar.d har no kkE ?.J.

ccfety ir.plicatior.c. #5% ?.?S Corrective Action:

The eslibration van che0hed. ceippint recet nrd checked in raccordty.ee with the c:urvcilhnee tect.

8402070082 740308 PDR ADOCK 05000277 Tc51ure 19t8: S PDR Previour retpoir.t chifts ca these witchen htive been re rted.

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v. 7. muich smrir.maent P<nch Ibito.- Ato-ir Power Ststier.

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• s MEMO ROUTE SLIP I Sa m' abo t tu For coacu"*aca- For ="fon-t o'm AI C-9 4 ( Ro. %v 14,19 4') AllM 02 40 Note aad eetura f or sigastu e.

r V For Wormation.

TO (Name anJ west) IPsill ALS REMARKS R0 Chief FS6EB PHIIADELPllIA ELECTRIC CO.

RO:llQ (4)

RO:DL (4) DATE A0 50-277-74-6 RO Files t/

DR Central Files TO (Na re and wn.tk lMITIALS REM ARKS OGC The above A0 is forwarded for information.

DAre Distribution will be raade by this office to the PDR, Local PDR, NSIC, DTIE, and State TO (Name and un!!) INiilALS RE MARKS Representatives.

D'1 F ROM (Nerre and unit) REMARR$

E. J. Brunner Region I 6/ M W

P&O.E % DArg 8-337-1746 3/4/74 USE OTHER 54DE FOR ADDITIONAL REMARKS gpg , ,, , g , ,4,, 4 C ,

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