ML20086G856
| ML20086G856 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 07/08/1975 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| AO-75-39, NUDOCS 8401120540 | |
| Download: ML20086G856 (1) | |
Text
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O O
- l Pelf DELPHIA ELECTRIC-COMPANY Peach -otton Atonic Power Station I) elta, Pennsylvania.
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37314 July k, 1975
- s.~ 7anc s /P. O'Reilly,' Director-
/
ffice of Inspection and Enforcement J'
- U OA* *#
g gh h 4 egion 1 aited States Jiuelear Reculatory Connission
- 31. J't.r.t-Avenue ing of Prussia. Pennsylvania. 19h06 1
'2h3 e ct :.
Abnornn1 Decurrence ?L-Rour Untiftention.
snfirming H.
S. Pleischmann's phone conversation with Mr. Walt Daunack, egion-1 Unit e d St atecMtuelen :--Hecul1rstory-Conni-eslott-on,Tuly 8, 1973_
trerence:
License Eueber DPR-56 ILW.t.a4."6E57w :s. FWSAT&;EriU'Oe uejrTETC%"MapRTJEg,- I eperb-No.:
IS-378=75-37
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'eport Date:
July 8, 1975 acurrence Date:
July 8. 1975 acility:
Peach Botton Atomic Power Station R.D.
1 Delta, Pennsylvania 1731h f entification of Occurrence :
HOIO pump suction frcn Condennate. Storage Tank Valve HO-3-13-18, inoperable electrienlly, onditiens Prior to Occurrence:
Unit 3 reactor at approximately 49.6%.
- cscription of occurrencet During the performance of Surveillance Test ST 6.11, the RCIC pump suction valve, MO-3-13-18, failed to operate electrically from the main control roon switch.
The valve was in the opened position.
tenignation of Apparent Cause of Occurrence:
Investigation deternined that the positive d.c.
lead to the control relays had pulled away frcu the terminal strip hold down screw.
.ualysis of Occurrence:
The RCIC systen is required to =ake up to the nuclear systen when the nain condenser in unavullabic er when the feedvater syste= in unavailable.
Although this RCIC synten vould not have auto =atically transferred its cuction from the condensate stornge tank to the torus on low condenante storage tank level, it would have supplied water from the condensate and is backed up by the HPCI nysten which was operable.
Safety significance of this occurrence is, therefore, minimal.
l
- orrective Action:
l Tne Icad to the control power relays was connected securely and the valve j
van stroked several timen satisfactorily.
Repairs were co=pleted within a few hours of the occurrence.
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8cilure Data:
1 None.
tery truly yours,
.CMdr 4.w
./ -
3 T.
Ullrich, Superintendent
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8401120540 750700 PDR ADOCK 05000278 s
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