ML20086F849
| ML20086F849 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 12/01/1975 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20086F847 | List: |
| References | |
| AO-75-77, NUDOCS 8401090591 | |
| Download: ML20086F849 (1) | |
Text
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f PHILADELPHIA. ELECTRIC COMPANY a--
Peach. Botton Atomic Power Station
[.
Delta, Pen ylvania M 6(
hg
[ y' Mr. James P.
O'Reilly Director-Offi ce;;of. Inspe ctics and.. Enf orcement Re gio n. 1.
Ubi.ted'. Ct ates.Nucl. ear Regni.atory. Commiss-ion 631 Purk. Avenuc+
Ef:ng: of"FFuss a.a., riffrn7'by,ania - 19406.
Subiect :'
Abnornal Oectstrence 26-Hour E'tificction o
Conf.irming. R.
S.
Fleiactennn'a phone.conversationswith.Mr. Lier Norrhols, Region.1, United.StatesiNuclear Regulatory Commission. on 11/28/75 Reference License Hucher 3PR-44.
T~chnical specifi. cation References.
k.5.G e
Report No.:
50-277-75-77
. Report Date:
November 20. 1975 Occurrence: Dates. Novecher 2 6. 1 97.5
.Facilityr.
P'ench Bo'tt'Uh Atonic Power sStation '
t E.D.
I,. Delta Pe nnsylvania. 17314 i
i.
Identification.of Occurrencec-Failure of LS-4223 to operate SV-4223 (RHR. Head' Spray 'line high point.s['
i,
vent) on(low ? accumulator level.
i Conditions Prior to Oc curren ce.:
l Unit.2 shutdown..
l Description of Occurrence:
Upon receipt of the heci sprny accu =ulator lov level alarm, investigation "i
revealed that the vent solenoid valve. failed to'open to refill the head j. "E l spray high point ac cumulat or.
I DesiEnation of Apparent Cause of Occurrence:.
s*
The fuse in the. solenoid valve e-ircuit was.found blown.
R e pl a c e = e n t. o f f,--
I the fuce resulted la imme.diately-blouinc. 'the fuse two core ti=es.
An investigation,is underway to find an apparent. ground in the circuit.
6 l
Anal.ysim of o c c urren c e-:
l There are no sa'fety implications-because the level switch alarced properly and the operator was abic to manually perform the function of the vent,~
7 j, solenoid valve.
!I']
"C'o rre c t ive Action:
- s 1
The operator manually vented the accumulato.r to ensure that the headi,.
spray. line was caint ained filled.
The head spray accu =ulator lov level 41arn is operable, so if low level occurs in the mecurulaterfit vill-be 4
manually ven.ted to fill the-system This vill continue until the I
system is. returned ta service.
Failure-Data:
STmilar failures reported as.AO-50-277-75-4, 50-278-75-20, 50-27.7.-75-34, t -
So-2TT-75 hh..ana 50-27.8-75-62.-
3 Very truly yours
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WW i
W.
T. Ullrich. Superintendent I
Peach.Bottas Atonic Power Station
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sr r-8401090591 751205 r
PDR ADOCK 05000277 S
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