ML20086B050

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AO 50-267/74-23:on 741211,engine a of Standby Diesel Generator 1-A Declutched & No Alarms Annunciated.Caused by Cylinder Air Pressure Decay Due to Dirt Under Solenoid Valve Seat.Change Notice 11 Re in-line Filters Approved
ML20086B050
Person / Time
Site: Fort Saint Vrain Xcel Energy icon.png
Issue date: 12/23/1974
From: Mathie F, Swart F
PUBLIC SERVICE CO. OF COLORADO
To: Howard E
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20086B055 List:
References
AO-50-267-74-23, NUDOCS 8311170021
Download: ML20086B050 (4)
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Text

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Dear Mr. Howard:

                                                        /                       k REF: Facility Operating License No. DPR-34 Docket No. 50-267 Enclosed please find a copy of Abnormal Occurrence Report No. 50-267/74/23, submitted per the requirements of the Technical Specifications.

Very truly yours, d' h O be/ Frederic E. Swart Superintendent Nuclear Production Fort St. Vrain Nuclear Generating Station FES:11 cc: Mr. Angelo Giambusso t N 8311170021 741223 PDR ADOCK 05000267 PDR 

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v REPO*;T DATE: Ike,d,cr 30, 197/i Alm 0R:IAL OCCU;tHL:!CE nCCUp*'.' :;CE DATE : Ik cr : .be r 11, 1974 l FORT ST VRAJ:: !'UCLi'AR GE:ER/. TING STATION ,, \M k ~ PUBLIC SERVICE UGPA'i'l 0F COLonADO , / < g\ ! P. O. 1:0X 361 PilsTTEVILLE, COLORADO C0651 ,,/ //j(,/fn%*

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J DE';TirI C A.TIO:1 0F 0 CCiG:.17:CF :. Enginc A of staidby dicac1 gcneratc,r 1-A declutched during a two hours curveillnnce run end no alarr's annunciated. CO:,'DITIO':S 'RIOR 70 OCCU:'im' <" : Stendy Strtc Power Routine Shutamm Hot Shutdom Routine Load Chang.e k* Cold Shut.dmm X X' Other (spccif y) Ecfueling Shutdcun P1r f out of r.rr. Ire to ch r. n 

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l 'ihe rr.jc,r p1rnt part.retcru at the tixc of the evcut were as follevs: i rover PTR, 0 IUch ELECT, 0_ INc j Secondary Coolant Pre: cure O poig i Tenp err. tu re_ O 'F ric-a _0 J/hr. Priucr, Cool r.n t Pressure M/A ysJ g Tc: .perature M/A 'F Core Inlet M/A 'F Core Outlet Flow 0 f/hr. ' 13109 i

O O Page 2 1 1 DESCRIPTION OF _OCCUI".3 AC E : During the tuo hour v:cckly surveillance rest at 1/2 Joad, cugine A of stcndby ncncrator 1-A declutched. To alarns annunciatcJ. On a second attenet the entine ctain declutched aa noon ac, the unit uns l started. /nain no alarns nnnunciated, i c APP /.RE?:T cal'SE OF OCGP_Ji_r:"'E: Design Unne. val Servi ce Con:'.. l including faviroa. l l Manufacture Component Tailurc l a . k Inntallation/Const. Other (specity) j i Operator See_bc3cv ~ i l i Precedure _ I i i i j Dirt under the seat of the colenoid valve to the clutch operating cyl.inder , I allowed the cylinder nir pressure to decay, and the unit to declutch. 4 4 1:o clarns ec:c en because the valve had not operated. I j l'tALYSIS C' c ~. . s . . .. . . . . \~ T m nir 'firr to 1.h u v . nc1J cua' r :s F:c.i f i ef. cit c. a)1 IGre i;;31 partici ' 3 l to cruse Ic :ee throu;.h t;'.e colm.o.~ e v.1ve chc . the r.e porticles Leewm j lodred unO the m.t. 1 1 00PiECTIVE l

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.l It hcc been recoco;ted for sove t Ec thet thi c cecurr er.:-c va9 a pont E!)ity. - f l / cerdin-Ty M: tt C:,r .' " a t .i c 'S. 11 vic .i--in - t c-d cm tinn n p m:' u n, l r.pprcred th53 1.. . : t b . ' in a c; .c qc w4 ie: p. o .cl.c in-32c.e fiJt.crt in ib - f ! cir liter. to the solenoid valves, to tetaave any f orei;;n interini Qirh mght ! interfere with colenoid valve operat: ion. . I I - TATLURE DATA /STllILAli KrPOT.TrD OCCUN":CT.f.: , l t l l'one , I l ! PR0";P.A'tfATTC 1MPACT-I . None , r l i i ' -. -- _ -_---- _-.--,,._ _ ,_.,_. _ .m- _, . _ _ __ __ _ _ , , , _ _ , , _

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