ML20084H034

AO 50-244/74-04:on 740406,during Periodic Test PT-2,1,safety Injection Pump 1C Failed to Start Manually on Bus 16.Caused by Failure of Capacitor in Control Circuit & Malfunction of Tripper Bar Switch.Switch Adjusted

ML20084H034
Person / Time
Site:	Ginna
Issue date:	04/08/1974
From:	ROCHESTER GAS & ELECTRIC CORP.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20084H033	List: ML20084H030 ML20084H034
References
AO-50-244-74-04, AO-50-244-74-4, NUDOCS 8304270431
Download: ML20084H034 (2)

Text

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Ginna StatfoW..k.: .: , .

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April 8(.1974 l<

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l., Mr. James P.-Q'ReillW Director .'.:- e l j. Directorste oERegulatopy Operations; e .'

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U. S. Atomic Energy /Conslission s.:

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'l , 631 Park Avenue ,tr;s-

,'. King of' Prussia,. Pennsylvania 19406 .

Subjectr. Abnormal O:currencas f 74-4 '." Failure .cf. the e,10c Safety Injectioa .

Pump to.: Start Nanuslly.fras Bus 16/2:.'. lz .

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Ginna Stationg .. Unit. #1 - d-1 Docket.tSO.-2447 ~

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Dear Mr. :

0' Ret 11ys : :ic ,

N This ia to confIrat:ay.. phone call-to:Mr. Walter.'Baunack. on Sundays. April 73

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... 1974 to " report Abnomal.0ccurrence :14-4 at Cinna Station.ci . .c ,

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) While conducting Periodic Teat -(PC-2.1)s.andifo11owing the aatisfactory tatt w-of the:1-A and .14-Safety..InjectionePtags,:the .1-2 Safety Injection.Pumir  : -

i f which can be operated froar either: Bus 44 or.Bua r.16s failed .to start maoually. .

{A on Bus .16..itw.of".the :four tinna it .was

• tried. -This is

• the second . time a fail "- J.:

R ute of., this nature has occurred.at:Ginaa. St6tionmThe other tr= was on Junar ... - -

ll and.Juna 11 1973 and ' reported :to .the:.AEC arr.Abnomal Occutrences .73-3.and..

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73-4. .

i The electricians were called io.and'.the viring circuitry. and.allrinterlock.s .2.. ~.>

were chacked.. The following,.two canaas: for the fallure, were : founds .

h (1) A 1 HFD capscitar in the conteni.ci cuit.was found to: fail inter : -

/, mittentlyv .This is.connectedt in series with a lohm resistor andw --

g they are zin. parallel:.with a .nortaally-open contact .for.;the. white  :-

breaker.: trip light and thec.74 BFD *16em relay. .This fattura . . . .

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caused a white light ani.alam< a -

(1) The tripper:bar.sawitch var sisotfound.to be. closing.toa.soon. .-

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[ allowing the :"X" . relay to operate; the. circuit breaker:ctoaing . ..

t the solenoid.before the : Lockout coil. .could . engage tha. mechanical r..

J.,' latch assemblye This caused a.. trip-free . operation and cbreaker - -

• closing. failure. This was .also an intemittent . failure.:. . . -

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Chief, Field Ceryleen un :

Enforcement brauch, II 4 AE ;0iitiAI., 000Ulliu':Cr.

Licencee-Loaket I;o. :

Alnorml Oaeurrence:

The attached report fro:a the cubject licencee is forw trded in accordance with 110 M uiuul Chapter 1000. Follow-up will be pe rfor: mi during the next incpect,lon, as appropriate. Copies of the report luve been forw:ir;i"d to the PDil, Local PDF, !; SIC, LTIE, onJ Stute r"p recent:itiv e c . h licencee will cut: sit . 10-day written report to Licencing.

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