ML20084S531

RO 50-265/75-47:on 751231,w/unit Operating at 805 Mwe, Reactor Core Isolation Cooling (RCIC) Trip Throttle Valve Could Not Be Reset Following Successful Monthly Surveillance Functional Testing.Hpci Tested & Found Operable

ML20084S531
Person / Time
Site:	Quad Cities
Issue date:	12/31/1975
From:	Kalivianakis N COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20084S523	List: ML20084S531
References
NUDOCS 8306170093
Download: ML20084S531 (1)

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Re gion III, Attention Mr. C. 1 'Aabund Decc=her 31, 1975 J. Keppler, Regional Directo r Office c .t Ins p e c t.io n and 3:a f o rc a n a n t Region III U.S. iluc' car Ecaulatory Connionion 799 aoosevalt Road I Glen Ellyn. IL 60137 l .

Hoference: - Q u a d- Ci tic a Uncicar Pouer Station. Unit 2 Docket So. 50-265 Drn-30 Appendiu A. Section 3.5.E.1, 6.6.n.1.c .

Dear Mr. Itcpple r:

I The p u rp or. e of thio letrer le to provide yoi trich no ti f.t ca t ion of a i Ro p e r t.a.b le Oc currrra ce on rnquired by Technical Spe cifica tice 6.6.B.A uithin 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of the o c c.ur ren ce .

On raconbar 31, 1975, uith Unit 2 operatinr, at SOS m E, the neactor Core Icolation Con 11an (RCIC) trip throttle velve could no t be renet foll.nting suc cons ful 3CIC nonthly curvo111saco f un c t$ or'nl tencing.

The High Presourc Coolant Injection (HPCI) Synton vac tenced in conpliance with Section 3.5.E.2 of the Te chnical Speci fic.a ciona nad van foun d operchie. An cporntor van dinpatched to invoutinate the cause of the nnifunction. IIo founr1 an in te rec ren ce in the trip and rucct linhage : echculan. A work requent van innued to correct the p robic ::.

By 12200 a.n. cn Dacenbor 31, 1975, the ECIC trip nechanian had been repaired and the RCI C cyn ton succcco fully tes te d.

This occurrence una discuened by telephone with Mr. Feierabend of your o.f fi ce on December 31, 1975. Further information vill be

• provided by Reportablo-Decurronce Report RO 50-265 / 75-47 which will be o ub e:l t te:d wi thin M dayn of the dato of this occurrenco. "

Vory truly youra, COMMO:!CF.ALTIP EDISCN 9,OMP/dlY, -QUI.D-CITIES HUCLF.AR POWER STATION  !

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