ML20086G453
| ML20086G453 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 07/10/1975 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| AO-50-277-75-53, AO-50-278-75-40, NUDOCS 8401110466 | |
| Download: ML20086G453 (1) | |
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7 Pench 13ott on.1. tonic Power Station-
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O*Reilly J Direcicr La 1.bc.u CA ; J-c~~
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.Of'fi'ce.- of. Instpcetion and Enforceuentu Region 1 I
. United Strrten. Huelcar Regulatory. Conuinolon.
631 Pnrh Avenute,
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Y.ing.of Pruccin, Pennuylvania. 19h0G U u b.5 c et t.
Abnoren1 Occ u rren ce 2 h Hour Not i f'I e nt lon. _
Confirni ng, R.,
S Pleischunnn.'tr phont-convernation uith Mr. Vult D r. ' n r.e k Region 1,. United'Utnteu Luclear Regulatory Conrefacion.on July 9, 197.5.
R e f e ren.c es:.
1,5cenne Number DPR-kh and' DPR-56 Technical Upeci f f. cation. Referencet 3.11 A 1 kupor.t..N o. r 50-277-75-53 and: 50-2.70-75-40,
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Report Dator J u ly 9,, 1977 c
Oc curren ce.. Dat e s-July 9, 1975 Yncility:
Pench Botton Atonic Power Gtation H. D..
.I, Delta, Pen n sylva ni a:.
1731k
' I d entifi e nt i o rt. of OccurrencM Failure. af the
'H' Control Hoc = Energency Ventilation Fan.
Conditionc Prior to Occurrence ='
Both' Units 2 und 3 at approximately50% power, b
D e ts cri p t i on of Occurrence:
During r. periodic equipnent, check after solenoid valve unintenance, the indicating innps.for fun. running.atatus vere observed to be out.
Designation of Apparent Cause of Occurrence:
In.ventiention determined: thatt.the control power trancformer had. failed.
Beenuce. the 15 any fuse ist r: e r i e n with the trancforcer did.not blow, no c au s s-for this failure..uno identified..
Ant.lycir of.Occurrencet Garety ois;nificance of thio incident in ninienl.bceauce the
'A' fan.is opernble ntM both filter trains are ts v a il a ble..f o r service.
A back-draft dauper.in ench loop precludes recirculatioa in the fciled loop.
C'o r re c t i v r-A c t i orr:. -
480 - 120V' control circuit, transformer vill be. replaced. and
-The n o t. i n f t.c t ory f an operntriotr will be verified.
Failure Data:
None.
Very truly. you'rn,.,
MJ W.
T.
Ullrich, Superintendent-Peach Botton, Atonic: Power Station
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m 8401110466 750710 DR ADOCK 05000 oo. _
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