ML20084G107

Telecopy of Ao:On 730717,during Surveillance Test,Components of One Side of Bistable LC-427 A/C Failed to de-energize When Signal Equal to 5% of Pressurizer Level Inserted. Cause Not Stated

ML20084G107
Person / Time
Site:	Ginna
Issue date:	07/18/1973
From:	Lang L ROCHESTER GAS & ELECTRIC CORP.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20084G104	List: ML20084G102 ML20084G107
References
NUDOCS 8304210478
Download: ML20084G107 (3)

Text

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018 PD ROCHESTER NY 07-18 916A EDT .Wm .

PMS MR JAMES P 0'REILLY DIR REGION 1 DIRECTOR ATE OF RECULATROY OPER ATIONS ,[,hf. .

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U.S. ATOMIC ENERGY COMMISSION .

/*{f 970 BROAD ST NEWARK NJER 07102 h%f SUBJECT ABNORMAL OCCURRENCE .] I'.k.. s. A,[

R.E. G INNA NUCLEAR POWER PLANT UNIT NO 1 DOCKET NO 50-244 gfr ai -

14 DE AR MR O R EILLY ,u ON JULY 17, 1973 DURING THE MONTHLY SURVEILLANCE 0F THE REACTOR N.h;y PROTECTION SYSTEM (PERIODIC TEST PT-5) COMPONENTS ONE SIDE ) 4b.6 -. o 0F BISTABLE LC-427 A/C FAILED TO DE-ENERGIZE WHEN A SIGNAL .fc M-EQUAL TO 5 PERCENT OF PRESSURIZER LEVEL WAS INSERTED THIS

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CONPNENT IS ONE PART OF A LOGIC SYSTEM WHICH WOULD GIVE A S/a SAFETY INJECTION SIGNAL IF IT OPER ATED CORRECTLY AS IT WAS

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INOPER ABLE IT IS BEING REPORTED AS AN ABNORMAL OCCURRENCE AS yn r

.kg PER THE GINNA STATION TECHNICAL SPECIFICATIONS 1.9D .}.. g. c . f i D. F AILURE OF ONE OR MORE COMPONENTS OF AN ENGINEERED ) 3: 5C M*- f t [ * , g SAFETY FEATURES OR PL' ANT PROTECTION SYSTEM THAT C AUSES .jf OR THRE ATENS TO CAUSE THE FEATURE OR SYSTEM TO BE INCAPABLE OF PERFORMING ITS INTENDED FUNCTION

[k PERIODIC TEST #5 CALLS FOR DEFEATING ONE OF FOUR PROTECTION ,e , k"Sd seo CHANNELS WHICH PUTS THAT CHANNELS COMPONENTS IN THE TRIP pga '

MODE SIGNALS ARE THEN INSERTED INTO THE VARIOUS COMPONENTS OF @8

, Nn THE PROTECTION CHANNEL AND THE BISTABLE ALARMS ARE THEN m -

VERIFIED AS TO THEIR SET POINTS  %

M 00 V WHEN THE 5/ LOW PRESSURIZER LEVEL SIGNAL WAS SIMULATED INTO- ,

BISTABLE LC-427A/C LOW PRESSURIZER LEVEL THE BISTABLE FAILED Em

no i TO DE-ENERGIZE (TRIP ) THIS ISTABLE HAS A SINGLE INPUT mam ,

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(PRESSUR IZER LEVEL) AtJD A DUAL OUTPUT (LOW PRESSURIZER LEVEL AND HI PRESSURIZER LEVEL) Tile HI PRESSURIZER LEVEL COMPONENT .,

DID WORK CORREC': LY WilEN A TEST SIGNAL W AS INSERTED THE SAFETY INJECTION LOGIC SYSTEM CALLS FOR A COMBINATION OF ,

IDW LEVEL AND LOW PRESSURE IN ANY OF THREE SEPAR ATE CIRCUITS IN OTHER WORDS ANY TWO OUT TWO IN A 10F THREE LOGIC SYSTEM AS THE OTHER TWO CllANNELS C0!1TAINING Tite S AFETY INJECTION LOG IC OPERATED CORRECTLY SAFETY INJECTION WOULD HAVE OCCURRED IF NECESSARY ,

LEE S LA!'G ASST SUPT GINA STATION I

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Licensec: Rochest,n Gas & Electric Corp.

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, 4 *. D. Thornburr,, oair Docket No.:

Facili U 50-244 R. E. Ginna Nuclear Power Plant a e

Chief, FSt.En b Abnormal Occurrence: Telegramdated7/18f7 a

i; t o twin.. .ae ,a.o i=m a atuaans Uio number indiculed) i .

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DR Central Files (1) o it The attached report from the subject licensee is Regulatory Standards (3) d, Dir. of Licensing (13' l

foruarded in accordance uith no Manual Chanter 1066 l

pg".a. 8 ay .na. .t aus The action taken by the licensee is considered Central Mait 6 Files

, mt appropriate'. Followup will be performed during the next inspection a's annropriate. conins of 1

. s nou tw.m. .no i,a.is ettuanas t . -

the report have been forwarded to the PDR, Local

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R. T. Carlson, Chief PDR, NSIC, DTIE and State representatives. The

. Facility Operations Branch, RO:I licensee vill submit a 10 day written report to PHOhtpeG f

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