ML20058F244
| ML20058F244 | |
| Person / Time | |
|---|---|
| Site: | Hope Creek  |
| Issue date: | 10/01/1990 |
| From: | Public Service Enterprise Group |
| To: | |
| Shared Package | |
| ML20058F242 | List: |
| References | |
| NUDOCS 9011080170 | |
| Download: ML20058F244 (4) | |
Text
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HOPE. CREEK GENERATING STATION-BAILEY 862 SYSTEM LOGIC MODULE
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FAILURE DATA REPORT PERIOD:
THIRD QUARTER 1990 1
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PREPARED BY:
/0 O/ IO SYSTEM ENGINEER DATE 1
APPROVED BY:
/M M8
/0 ///80
-l TECHNICAL ENGINEER DATE j
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1 PAGE 1 9011080170 901026 PDR-ADOCK 050003S4 R
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BAILEY SSIM REPORT l
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SUMMARY
OF' FAILURES >BY MONTH DURING REPORT PERIOD l
I JULY 121Q
'.1) 07/02/90;
-1DC652 SLOT 5-4-12 0-1227 N-2595 I
. INPUT BUFFER.#2 FAILED.
CONFIRMED FAILURE j
s W.O.-900702079.
5 PROBLEM:
DUAL VALVE POSITION INDICATION AT MCR FOR-
-l 1EAHV-2197D, BACKWASH WTR FROM STRAINER DF509.
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07/10/90
'1CC652 SLOT 1-3-2 0-2202 N-0652 l
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INPUT / OUTPUT BUFFER-#7 FAILED.
CONFIRMED FAILURE PROBLEM::
CONTROL / DIESEL 1E SWGR BRER 10-A-403-01 DID l
lNOT REMAIN CLOSED UPON DEMAND FROM MCR.
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07/17/90-
- 1CC652 SLOT 4-10-10 0-0870 N-0556.
T/S-CARD REPLACEMENT ONLY.
NOT A FAILURE W.O.
900718144
' PROBLEM:
DUAL 1AP400 (HVAC) PUMP RUN' INDICATION, CARD REMOVED AND' TESTED ON SSLM TESTER.
NO PROBLEM FOUND ON LOGIC' MODULE.
DECISION MADE TO REPLACE CARD.
1 4) 07/30/90 1BC652 SLOT 8-9-5 0-1228 N-0110 OUTPUT BUFFER #3EINTERMITTENT CONFIRMED FAILURE C'
<W.O.
900730093 PROBLEM: 1.1FCHV-F059 -(RCIC STM EXH VLV) IDSS OF MCR POSITION INDICATION.
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TOTAL MONTRLY FAILURES a.3 88LM'8 j
l AUGUST'1990 l
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08/11/90 1DC653L SLOT =9-9-9
'O-1549
.N-2242 l
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INPUT / OUTPUT BUFFER'#1 FAILED.
. CONFIRMED FAILURE i
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- W.O.' 900811112 L
' PROBLEM:
1BBHV-F031B (RX RECIRC PMP "B" DISCH), IDSSi L
OF VALVE POSITION INDICATION.
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2) 08/14/90 1CC652 SLOT 5-10 0-0872 N-0183 T/S-CARD REPLACEMENT ONLY.
' CONFIRMED FAILURE W.O.
900813167
' PROBLEM::
1ABHV-3631B (CNTMNT ISOL VALVE OVRLD/PF' LOGIC)
CAUSING' ANN D1-B3-TO ALARM.
FOUND.FLPA CHIP LOOSE IN-i SOCKET.
SLIGHTEST ~ VIBRATION CAUSED INTERMITTENT 1
FAILURES. ' REWORKED FLPA AND CARD RETESTED SAT.
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3) 08/20/90 1BC653 SICT 8-3-8, 0-0241 N-0342 T/S-CARD REPLACEMENT ONLY.
NOT A FAILURE-W.O.
900820122
- PROBLEM:
1B-P-209 (RACS "B" PMP) WOULD NOT STOP FROM
.MCR.
T/S FOUND LOOSE CONNECTOR ON 7-1-3.
DURING T/S CAUSED LOGIC INPUT FAILURE ON LOGIC CARD.
REQUIRED REPLACEMENT,. T/S FAILURE AND'NOT A SERVICE FAILURE.
TOTAL MONTHLY FAILURES a 2 88LM SEPTEMBER 111Q TOTAL MONTHLY FAILURES z 0 88LM
-TOTAL QUARTERLY FAILURE 8~m 5 88LM88 B..
FAILURE'. RATE DATA 1) 24 :' CONFIRMED FAILURES FROM 10/01/89 THRU 09/30/90.
2) 2278 SSLM' POPULATION
=
'3), ANNUAL. FAILURE RATE PERCENTAGE:
a.
24 + 2278 ='O.01009 x 100 = 1.01 %
4)
MEAN TIME BETWEEN FAILURES DETERMINATION:
MTBF FROM 10/01/89 THRU 09/30/90.
a '.
12 MONTH SERVICE HOURS = 8760 HOURS j
b.
TOTAL MODULE SERVICE HOURS 8760 x 2278 = 19.95'x 106 19.95 x 106 + 24 FAILURES = 831,'250 HOURS.
c.-
24 + 19.95'x 106'= 1.20' FAILURES PER MILLION HOURS FAILURE RATE.
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COMPARISON STANDARD 1)
THE IEEE 101 STANDARD EXPECTED FAILURE RATE OF SOLID STATE COMPUTATION DEVICES'IS EQUAL TO 1.19 FAILURES 233 MILLION BOURS FAILURE RhTE.
- 2) _.THE HCGS BAILEY JL6.2 SELN FAILURE RATE FROM Q.GT 19.9.9.
THRU SEPT 1990 IS. EQUAL TO Ljl FAILURES PIB MILLION HOURS FAILURE RATE.
D.
-ANALYSIS.
1): HCGS: BAILEY 862 SSLM FAILURE RATE APPEARS TO HAVE STABILIZED'IAW IEEE 500-STANDARD.
2)
THE: CONFIRMED FAILURE DATED 07/10/90 DID AFFECT A
.. p SAFETY RELATED FUNCTION (LOSS OF "C" VITAL BUS).
~'
THE PROBLEMJWAS ENCOUNTERED DURING'A RELAY 1.
DEPARTMENT 31 DAY DEGRADED VOLTAGE' SURVEILLANCE TEST ON THE'10A403 BUS. THE SSLM FAILURE CAUSED THE IDSS OF POWER ON THE 10A403 BUS DURING A TRANSFER OF BREAKERS 52-40301 AND 52-40308.. VARIOUS FUNCTIONS-
.THEN.TOOK PLACE, CAUSING A POWER REDUCTION TO'95%'RX PWR.
UPON STABILIZATION, SYSTEMS WERE RESET AND PWR i
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, RESTORED TO 100%.
.-s ALL-OTHER FAILURES AFFECTED INDICATION ONLY.
E.
RECOMMENDATIONS 1)' ?NONE l
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