ML20084G107
| 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: |
| References | |
| NUDOCS 8304210478 | |
| Download: ML20084G107 (3) | |
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PMS MR JAMES P 0'REILLY DIR REGION 1 Q.
DIRECTOR ATE OF RECULATROY OPER ATIONS U.S. ATOMIC ENERGY COMMISSION
/*{f 970 BROAD ST NEWARK NJER 07102 h%f
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SUBJECT ABNORMAL OCCURRENCE s.
R.E. G INNA NUCLEAR POWER PLANT UNIT NO 1 DOCKET NO 50-244 gfr ai 14 DE AR MR O EILLY
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ON JULY 17, 1973 DURING THE MONTHLY SURVEILLANCE 0F THE REACTOR PROTECTION SYSTEM (PERIODIC TEST PT-5) COMPONENTS ONE SIDE 4b.6 o
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0F BISTABLE LC-427 A/C FAILED TO DE-ENERGIZE WHEN A SIGNAL
.fc M-N 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
>i SAFETY INJECTION SIGNAL IF IT OPER ATED CORRECTLY AS IT WAS
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PER THE GINNA STATION TECHNICAL SPECIFICATIONS 1.9D
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) 3: 5C D. F AILURE OF ONE OR MORE COMPONENTS OF AN ENGINEERED M*- f t [ *, g SAFETY FEATURES OR PL' ANT PROTECTION SYSTEM THAT C AUSES
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WHEN THE 5/ LOW PRESSURIZER LEVEL SIGNAL WAS SIMULATED INTO-BISTABLE LC-427A/C LOW PRESSURIZER LEVEL THE BISTABLE FAILED Em no TO DE-ENERGIZE (TRIP ) THIS ISTABLE HAS A SINGLE INPUT mam i
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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.
Facili U R.
E. Ginna Nuclear Power
'l lt, 4 *. D. Thornburr,,
oair Docket No.:
50-244 Plant a
e Chief, FSt.En Abnormal Occurrence: Telegramdated7/18f7 b
ai; t o twin...ae,a.o i=m a atuaans Uio number indiculed) i j
RO:llQ (5)
DR Central Files (1)
The attached report from the subject licensee is o it Regulatory Standards (3) d, Dir. of Licensing (13' foruarded in accordance uith no Manual Chanter 1066 l
pg".a. ay
.na.
.t aus l
8 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 the report have been forwarded to the PDR, Local t
/ '.,/ (,. b 6.', --
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 teAft )4 // f_
PHOhtpeG f
Licensing.
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