ML20067B375
| ML20067B375 | |
| Person / Time | |
|---|---|
| Site: | Hope Creek  |
| Issue date: | 01/08/1991 |
| From: | Public Service Enterprise Group |
| To: | |
| Shared Package | |
| ML20067B373 | List: |
| References | |
| NUDOCS 9102080232 | |
| Download: ML20067B375 (4) | |
Text
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I HOPE CREEK GENERATING STATION--
EAILEY 862 SYSTEM LOGIC MODULE FAILURE DATA REPORT PERIOD:
FOURTH QUARTER 1990 l fT fgf.
PREPARED BY:
L SYSTEM ENCrINEER DATE APPROVED BY:
[)d4
/-7 9f TECHNICAL ENGINEER TATE i
1 PAGE 1 9102080232 910201 PDR ADOCK 05000354 R
PDR WLL '7(0/7 L
j 2
l BAILEY SSLM REPORT A.
SUMMARY
OF FAILURES BY MONTH DURING-REPORT PERIOD i
OCTOBER 1990 1) 10/02/90 1CC653 SLOTL8-6-15 0-2399-N-0600 INPUT BUFFER #8 FAILED.
CONFIRMED FAILURE-W.O.
901001308 PROBLEM: - 1C-P-209,.C RACS PUMP 1 TRIPPED ON LOWJFLOW.'
TOTAL MONTHLY FAILURES = 1 i
NOVEMBER 1990 1) 11/04/90 1AC652-SLOT 9-6 0-1241
-N-0617-i INPUT BUFFER #5 FAILED.
CONFIRMED FAILURE WO 901104088 PROBLEM:
NO OPEN INDICATION FOR 1BEHV-F005A-E21. CORE SPRAY LOOP A CONTAINMENT ISOLATION.'-
- j 2) 11/08/90 1CC653 SLOT 8-7-6 0-2403-
'N-1379.
INPUT BUFFER #1 FAILED CONFIRMED-FAILURE.
W.O.
901019077 PROBLEM:
DUAL INDICATION ON.-1CGHV-1962A, 2ND; STAGE AIR-
' EJECTOR A SUCTION.
3).
11/11/90-1CC653 SLOT'5-4-2 0-1558 N-1232 INPUT BUFFER #1 FAILED CONFIRMED. FAILURE-W.O.
901110095 PROBLEM:
1C-P-137', C SEC COND PUMP,; DUAL: START /STOPn INDICATION WITH PUMP OOS.
l 4)
-11/12/90 1BC653 SLOT 4-7-12 0-1088-
- N-1269 INPUT BUFFER #1 FAILED.
L CONFIRMED--- FAILURE-W.O.
901105143-PROBLEM:
1AFHV-1502B1, 6B'FW HTR STARTUP-VENT, DUAL.
l INDICATION.
l 5) 11/13/90:
1BC653-SLOT-12-5 aO-1694 N-0603i 1
OUTPUT BUFFERS #2,4,6 FAILED,
- CONFIRMED. FAILURE W.O.
900927151.
PROBLEM:
- 1F2V-212, DRYWELL-COOLER. FAN INDICATED-BOTH STOP AND START.HI WHEN FAN WAS RUNNING.
6) 11/21/90.
~1BC652 SLOT:8-9-5' O-0212'
- N-1362 INPUT BUFFER-#5' FAILED CONFIRMED FAILURE W.O.
900208293
. PROBLEM:
1BDHV-4405 WOULD NOT~SHOW OPEN. ACTUAL MODULE-FAILURE WOULD HAVE:AFFECTED 1FCHV-F060-E51,' RCIC' VACUUM ~
-PUMP DISCHARGE VALVE. THE LATTER-VALVE WOULD.HAVELALWAYSj
'HAD AN OPEN INDICATION.
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7) 11/27/90 1AC652 SLOT 8-9-7 O-2'410-N-1125 INPUT BUFFER #6 FAILED:
CONFIRMED FAILURE W.O.
901127093 PROBLEM:- 1FDHV-F001-E41, HPCI TURBINE STEAM SUPPLY VALVE, HAD FLASHING OVLD/PWR FAIL INDICATION WHICH WOULD NOT ACKNOWLEDGE.
TOTAL MONTHLY FAILURES = 7 DECEMBER 1990 1) 12/05/90
-1CC653 SLOT 8-6-8 O-1274
. N-0358 INPUT BUFFER #8 FAILED CONFIRMED FAILURE-W.O.
901119107 PROBLEM:
1C-S-100, C RFPT TURNING GEAR, WOULD NOT-START:
WHEN REQUESTED FROM THE CONTROL ROOM.
i TOTAL MONTHLY FAILURES = 1 TOTAL QUARTERLY FAILURES = 9 SSLM'8 B.
FAILURE RATE DATA 1)
-25 CONFIRMED FAILURES.FROM 01/01/90 THRU 12/31/90.
2) 2278 SSLM POPULATION 3)
ANNUAL FAILURS RATE PERCENTAGE:
a.
25 + 2278 = 0.01009 x 100 = 1.10 %
4)
MEAN TIME BETWEEN FAILURES' DETERMINATION:
MTBF FROM.01/01/90 THRU 12/31/90.-
a.
12 MONTH SERVICE HOURS-= 8760 HOURS b.
TOTAL MODULE SERVICE HOURS f8760 X 2278 = 19.95'x 106'
'19.95 x 106 +.25 FAILURES = 798,211 HOURS-t c.
25-+ 19.95 x 106 = 1.25 FAILURES PER MILLION LHOURS' FAILURE RATE.
C.
COMPARISON STANDARD, 1)
THE lEEE 50_Q-STANDARD-EXPECTED-FAILURE RATE OF SOLIDL STATE COMPUTATION DEVICES IS EQUAL TO_1.19 FAILURES R
EIE'MILLION HOURS FAILURE BATE 2 PAGE 3-I
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2)
THE'HCfd BAILEY 312. SSLM FAILURE RATE-FROM JAH 1990 THRU QEC 1990 IS-EQUAL TO-1.25 FAILURES EIB MILLION HOURS FAILURE RATE.
1 D.
-ANALYSIS 1)
HCGS BAILEY 862 SSLM FAILURE RATE APPEARS TO.HAVE i
STABILIZED'IAW-IEEE 500 STANDARD._
l 2)
NO CONFIRMED FAILURE RESULTED'IN INOPERABILITY OFe ANY SAFETY RELATED FUNCTION. ALL FAILURES RELATED TO SAFETY RELATED'FUNCTIONSLWERE-INDICATION PROBLEMS ONLY. THOSE VALVES AFFECTED-OPERATED'AS PER DESIGN.-
E.
RECOMMENDATIONS-1)
NONE J
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