ML20086L508
| ML20086L508 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 03/21/1974 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20086L507 | List: |
| References | |
| AO-74-13, NUDOCS 8402080274 | |
| Download: ML20086L508 (1) | |
Text
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4i March 21, 1974
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Mr. Jr.cer P. O'Reilly, Director United Stites Atomic Entrgy Co miccion Directorate of Regulatory Oper6tions 631 b rk Avenue King of Pruccis, Pennsylvania 19L60 Sub.k e t :
Abnorr.sl Occurrence 24-Mour Notifiention Ccnfirring my con ercation with Mr. E. A. Teil, A.E.C. Region I Regulatcry Operatior/s Office on March 20. 1974 Rc rerer.c c : Licenre Nu.icer LPR 44. Amer.dment Number 1 Tcchnical 2pecificatier. Table 3 5.B.1 Report Uc.:
50-277-74-13 Ectort Dstc:
3/21/7h
, 00:urrence k ie: 3/19/7L Fr.r. lit y :
Fesch Ictton Atomic Power Station - Unit 2 R. D. 1. Delta, Per.nrylvania 17314 Identification of Occurrence:
Open circuit in the motor centrol wirir.g of IO-89A (rig heat exchanger iTW outlet valve).
Cenditient Prior t.: Occurrence:
Pinnt chutdown.
EHR in service in terur cooling node.
D65Criptict of COCRridr.CC:
W,-2-10-039A EP2i outlet valve from FJG heat exchanger closed '
cudde:.ly -hile in throttling cervice. The valve would not reopen When given an open sicr.nl from the control room manuni controller.
Ar. alterr.nte hest ex hanger was subsequently plseed in cervice.
Designation of Apparent Couee of Occurrence:
Prelicir.ary inventicrtion showed a broken wire in the opening circuit that rapplier power to the coil for oper.ing the valve. S e fai3ure in believed to hsve been causeri by poor craftc.anchip coupled with vibrati:n ef,the valve during operation.
Ar.slyric of Occurrer.ce:
Tnis :nilure esser.tisily inhibite the use of this heat exchanger for c:clir.g purpos:es.
It does not effect tne FE.'s nbility to deliver water tc the re.: tor versel. Only one of the four RIS hent exchangers is required tc ecol the pric.ary cycten under ar.y postulated accident ccr.di t i::nc No safety cignificance is associated with this problem, a
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o, Thr wire was broken at a point where it vac critped to a luc.
Pro}:er repairs w rade.
Incpections will be mn on other va'.ves ir, a siti service.
All improper connec
..s found vill te repaired.
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