ML20086H933
| ML20086H933 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 04/28/1975 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20086H927 | List: |
| References | |
| AO-75-29, NUDOCS 8401200354 | |
| Download: ML20086H933 (1) | |
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PIIILAD}1rHI A TLECTRIC CO.TPA!.*/
Perch 2'ot ten Ato:nic Powr Station IMita, Pennnylvania 17314 April 28, 1975 Hr. J.ma P. O'Re!Ily,, Director 3ffico-oTJno;.s-et ioit -end h etw& u u
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United States liuclear Regulatory Cor:sistaion g f h C)/./?7tL C-631 Pt.tk Avenuo Etos of Pru:mia, Pennsylvenia 1940G
Subject:
A%orral Occurince_ 21-Hour Ibtification Contir:sinn W. T. U11 rich's phone convercation vith Mr. J. Partlow, Regioit States I?ucicar Retult. tory Cr:cienfon, on April 26, 1975.
1, Faited IMfercuco:
License Uttt.ber DTR-44 Technical Specification Referent.e:
4.7.L.1.b(2) and Table 3.7.1 Ecport no.:
50-277-75-29 Report Date:
1pril 20, 1975 Decurrence Date:
April 26, 1975 Faci.11ty:
Pecch Lotto:t Atenic Power Station 5
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E.D. 1 Dalta, Pennsylvania 17314 4
b, 3'e Identifiention of Occurrence:
Fast closuro of 1:31V GCD.
Conditions Prior to Occurrence Unit 2 operating at upprorhtely 75% of full pover.
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Decer/pcion of Occurrence:
Durint a rcutine r.u:veillance test the h onter ir.olctie i vrim en Unit 2 c.lrd:;J in 2.5 cceands.
Clocura tism an r.Mcified in the Technical Specificctions in tree tcr than 3 r er a-.da.
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.? r r t'.n 0 w: 2w.
Denignatiert of Apparent ('ause of Occurrence:
liinor oil ic4k in valve control hydraulic circuit.
Axualynia of occurrenca:
The curvc111 race tect perforr.-d on April 1"G,1975 indicated that all but one of the eight l*3IV's clor,ed within the allot.mbin tira. Fast closure of the CSD valve by 0.5 eetends vould not cinnific.-ntly chr r the cax.f tnra presrure reachi d in um reactor vnenet if.n icolation occurred.
safety cinnificance.
is occurrence, therefore, has ninire,r2 F
.h e-Corrective Action:
Adjustnants were rude to the hydraulic s tru h circuit to cet the valve closing tfr.a at 3.5 c.ecords.
railure Data:
A previcu2 occurrence of this typo was repertes as A.O. 50-277-74-7.
A Very truly yours,
/N?
U. T. Ullrich, Superintcadent Fcach 1.oteca Ato'alc Puer Station 8401200354 7505d6 1~
PDR ADOCK 05000277 S
PDR I
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