ML20067B375

Bailey 862 Sys Logic Module Failure Data Rept,Fourth Quarter 1990

ML20067B375
Person / Time
Site:	Hope Creek
Issue date:	01/08/1991
From:	Public Service Enterprise Group
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Shared Package
ML20067B373	List: ML20067B369 ML20067B375
References
NUDOCS 9102080232
Download: ML20067B375 (4)

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I HOPE CREEK GENERATING STATION--

EAILEY 862 SYSTEM LOGIC MODULE FAILURE DATA REPORT PERIOD: FOURTH QUARTER 1990 PREPARED BY: L l fT fgf .

SYSTEM ENCrINEER DATE APPROVED BY: [)d4 /-7 9f TECHNICAL ENGINEER TATE i

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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. ,

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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.

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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 '

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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._

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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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