ML20086L508

Telecopy AO 74-13:on 740319,open Circuit Found in Motor Control Wiring of RHR HX HPSW Outlet Valve MO-89A.Caused by Broken Wire.Wire Repaired

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: ML20086L497 ML20086L508
References
AO-74-13, NUDOCS 8402080274
Download: ML20086L508 (1)

Text

Delta, Penncylvanis ^)(; -

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.g o . 2n1' oMarch 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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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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