ML20059H873

Forwards Info Re Flooding Analysis for Plant IPE

ML20059H873
Person / Time
Site:	Zion  File:ZionSolutions icon.png
Issue date:	10/21/1993
From:	Polanski X AFFILIATION NOT ASSIGNED
To:	Rodrick E NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES)
Shared Package
ML19303F780	List: ML20059H852 ML20059H873 ML20059H887 ML20059J113 ML20059K919
References
NUDOCS 9401310204
Download: ML20059H873 (67)

Text

1 October 21,1993 Ed Rodrick NRC Office of Research Mail Stop 324 5650 Nicholson Lane Rockville, MD 20852

Dear Ed:

Enclosed, in accordance with your request, is information concerning the flooding analysis for the Zion IPE.

$95N f =f A

Xavier Polanski

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94013102o4 931021 ADOCK 05000295 PDR PDR p

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Flooding Analysis Page 15 of the CECO Internal Flooding Evaluation Methodology Guideline, labeled as Attachment A, includes the statement, "If equipment is located either directly below or within a ten foot radius of one of these sources, then it will be analyzed with respect to failure modes as a result of spraying or splashing." This particular radius was established as a consensus engineering judgment by Westinghouse and Tenera personnel working on the flooding analysis, with CECO concurrence. In a spray or splash analysis, it is assumed that all equipment within a given radius, no matter what direction, is disabled if a leak occurs. This is very conservative, since it is extremely unlikely that the spray would occur in all directions at once. Use of a thirty foot, or so, spray radius, coupled with the assumption concerning spray in all directions, results in a very conservative consequence analysis, especially for lower-pressure water sources. It was judged, therefore, that a ten-foot radius would yield a more realistic estimate of spray / splash risk.

For the Zion IPE flooding analysis, no supporting calculations for adequacy of drainage were required. This is because, to be of interest, a flooding location had to have a source of water, cause a plant trip, and disable important equipment. Nerirly all such places of interest were areas in the general open areas of the building. In all of those cases, a stairway was nearby. Because of the large drainage area provided by the stairways, no detailed calculations were required. Once that water drained into the basement of the respective building, the consequences were assessed. In no case was critical equipment at serious risk. For flooding locations not in the general areas of the buildings, large gratings providing many square feet of drainage area were available, thus j

eleiminating the need for detailed drainage calculations.

The flooding analysis lists no water sources in the switchgear rooms. As you and I observed during the walkdown, there are heating system (HS) pipes in the ceiling of the switchgear rooms. The unit heaters in these rooms are fed by 1" lines, and the pressure in the pipes is only a few pounds. Furthermore the insulation on the pipes would prevent significant spray. Therefore, their contribution to flooding or to spray is considered to be negligible. In addition, flood or spray in a non-essential equipment room could cause a plant trip, but it would not degrade safe shutdown equipment. Loss of equipment in an essential switchgear room would not cause a plant trip.

The CECO methodology does take pipe breaks into account. However, the Zion screening analysis resulted in no locations in which a flooding frequency had to be determined. Attachment B shows Table 5 of the Zion IPE Flooding Analysis Notebook.

These are the flood areas not eliminated by coarse screening. Detailed examination of these areas showed that flooding was prevented by adequate drainage, and there were either no spray sources, or spray would not result in a reactor trip.

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15 area, then that area can be eliminated without performing additional time consuming calculations to account for the mitigative features. If the calculated Good height threatens the equipment within the area, then calculations must be performed to account for the mitigative features, such as the drains, sump pumps, and any other Dow paths out of the area.

In performing these more detailed calculations for areas, the maximum Dood rates and volumes are assumed for the flooding sources. For example, double. ended guillotine breaks are assumed for pipe ruptures and catastrophic tank, valve and pump ruptures are also assumed as the component failures which result in Gooding.

An example of the tank failure is described in Case 1 given below. A double-ended guillotine break may be found by assuming the maximum Dow rate from the pipe.

When the maximum expected flood height is calculated, it can be determined whether the equipment in the room can be submerged by taking into account the capacity of the drainage system and other protective features. Equations for calculating the maximum Good in these areas are given in the cases described below.

The analyst should also note maximum flow and drainage rates and the time associated with Rooding equipment in each particular area. It should alsote noted that equipment failures might result not only from submerging but could also be caused from getting wet, (e.g., waterJpraying, splashing or dripping from a pipe above).

After calculating the maximum Dood height in each area, the area is reviewed to determine if there is any equipment located above the maximum flood height that could fail as a result of water spraying or splashing onto it. For this analysis, it is conservatively assumed that if water comes in contact with any electrical equipment (cables, control circuitry), or pump or valve motors that are not covered and/or sealed to protect them from water intrusion, water spraying or splashing onto them will cause equipment failure. The source of the spraying or splashing and the relative position of equipment should be identified. If it is determined (either through the walkdown or be examining the plant general arrangement drawings) that it is feasible for water to splash or spray on equipment, then this must be analyzed in addition to equipment failures resulting from the flood in that area. In this analysis only pipe joints (flanges, valves) and tanks will be considered as sources of spraying or splashing. If equipment is located either directly below or within a ten foot radius ~

of one of these sources, then it will be analyzed with respect to failure rnodes as a result of spraying or splashing.

i The following equations can be used to calculate flood depths for various situations.

The equations are given for three cases; tank rupture, flooding inside a curbed area, and Good depth in a room with drainage under a door.

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-Table 5 Zion Internet f(ooding Analysie Results of Qualitative Analysis Rx Fld Spr-Screened from Flooding Screened from Spray Zone Description Elev Trp Src Src Drn Scr Comment Scr Coment 11.2-0 Aux suilding, sesement Level 560 Y Y Y Y Y Adequate Drainese Y No Reactor Trip 11.2F 1 Unit 1 Pipe Chase 560 Y Y Y Y Adequate Drainese Y No Reactor Trip 11.2F-2 unit 2 Pipe Chese 560 Y Y Y -

Y Ade wete Dralnese i No Reactor Trip 11.M -1 Unit 1 Pipe Chase 579 Y Y~

Y Y Y Adequate Dralnese Y No Reactor Trip 11.M -2 unit 2 Pipe Chase 579 Y Y Y Y Y Adewate Dralnese, Y No Reactor Trip 11.4C-1 Unit 1 Pipe Chase 592-Y Y

Y Y

Y Adequate Drainese Y No Reactor Trip 11.4C-2 Unit 2 Pipe Chase 592 Y Y Y Y Y Adewete Dralnese Y No Reactor Trip h

18.45-0 Inner trib House 594 Y Y Y Y Y Ade m ote Drainage Y No Reactor Trip M

18.5-1 Unit 1 Stema Pipe T m net 560 Y N N Y Y Adewate Drainage Y No spray sources y

18.5-2: Unit 2 steen Pipe Y m nel 560

-Y N N Y Y Adequate Drelnege Y No Spray Sources-N/A Turbine sullding All Y Y Y Y Y Adewate Drainage Y No Reactor. Trip r

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Xavier Polanau september 27,1993 l

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Imoortance Measures in the Zion IPE Importance Measures from the Westinghouse Code QT (Attachment 1)

The first page (Initiating Event Repon) shows core damage frequency associated with each initiator. The next two pages (Top Events Report) show the sum, for each PRT node, of the core damage frequency for every sequence in which that node has failed. (This is a Fussel-Vesely-type imponance.) The fourth and fifth pages (Damage States Report) are a similar listing for each core damage state. The final pages (Dominant Sequence Report) are a listing l

of the top 110 core damage sequences.

Importance Measures from the SAIC code RMQS

i To produce this model, the fault tree quantifications (cutsets) for each node in the top l

sequences (the top 110 sequences, plus others as useful to incorporate key equipment nodes) are combined with the PRT sequences. RMQS uses them to produce basic event imponance measures.

Basic Event Risk Reduction Wonh (Attachment 2)

This listing includes the basic event identifier and the text from each basic event in the fault trees. For basic event with the highest imponance, additional text (" Comments" and

" System") have been added for clarification. Fussel-Vesely imponance is also available, but RRW = 1 + (FV), so a similar ranking would result.

Basic Event Risk Achievement Worth (Attachment 3) i This listing includes the basic event identifier and the text from each basic event in the fault trees. For basic event with the highest imponance, additional text (" Comments" and

" System") have been added for clarification.

PRT Node Risk Reduction Wonh (Attachment 4)

This listing provides " nodal" importances for each different PRT nodal quantification. Since i

most operator actions are included as PRT nodes rather than as fault tree basic events, this list provides operator action importances and imponances for other PRT nodes, like RWST and safeguards actuation, that are not quantified directly with a fault tree. These importances can be compared to the component basic event imponances from Attachment 2. (Operator l

action nodes all start with "O.")

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$sptember 27,1993 -

PRT Node Risk Achievement Worth (Attachment 5)

This listing provides " nodal" importances for each diffemnt PRT nodal quantification. Since most operator actions am included as PRT nodes rather than as fault tree basic events, this list provides operator action imponances and imponances for other PRT nodes, like RWST and safeguards actuation, that are not quantified directly with a fault tree. These importances can be compared to the component basic event imponances from Attachment 3. (Operator action nodes all start with "O.")

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Mon Mcr.02 10:47:32 1992' lr ' -initiating Event Report.

Summary over all inttfating events on 03/02/92 10:47:27 NAME DESCRIPTION' FREQUENCY PERCENT LLOCA LARGE LOCA INITIATING EVENT-1.324E-006 33.09%

SGTR

. STEAM GENERATOR TUBE RUPTURE ]NITIATING EVENT' 1.152E-006 28.80%

"DLOOP DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT 9.000E-007 22.50%

MLOCA' MED]UM LOCA INITI ATING EVENT -

3.973E-007 9.93%

SLOCA -

SMALL LOCA INITIATING EVENT 1.540E 007 3.851 GTR GENI.RAL TRANS]ENT INITIATING EVENT-4.615E-008 1.15%

. LOOP LOSS OF OFFSITE POWER INITIATING EVENT 2.124E 008- -0.53%

ISLOCA INTERFACING iTSTEMS LOCA INITIATING EVENT 4.532E-009 0.11%

7.209E 010 0.02%

LDC LDSS OF 125V DC BUS 111 INITIATING EVENT 2.346E-010 0.01%

FBIN FEED BREAK ]NSIDE CONTAINMENT INITIATING EVENT SBIN STEAM BREAK INSIDE CONTAINMENT INITIATING EVENT 2.346E-010 0.01%

FBOUT FEED BREAK OUTSIDE CONTAINMENT INITIATING EVENT 2.345E 010 0.01%

e SBOUT.

STEAM BREAK OUTSIDE CONTAINMENT INITIATING EVENT 2.344E 010 0.01%

LSW.

LDSS OF SERVICE WATER INITIATING EVENT-5.126E-011 0.001 LCCW-LOSS OF COMPONENT COOLING WATER INITIATING EVENT 4.687E-013 0.00%

Tatet plant damese state frequency = 4.001E-006

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Filo: ACCSEQ. REP L3ngth: 80674 bytes Created: Mon. Mar 02 10:47:32 1992 Top Events Report uunnry over att initiating events on 03/02/92 10:47:27 FREQUENCY PERCENT NAME DESCRIPTION ORT OP ACT10N REFILL THE RWST 1.366E-006 34.15%

RTK EQUIPMENT TO REFILL RWST 1.337E-006 33.42%

BUS 4160V AC BUSES 147, 148, 149 9.128E-007 22.82%

ORC OP ACTION ESTABLISH ECC RECIRCULATION 8.144E 007 20.36%

LPI LOW PRESSURE INJECTION 7.430E-007 18.57%

CDS OP ACTION SG DEPRESS FOR PRIM COOLING 6.785E-007 16.96%

FC REACTOR CONTAINMENT FAN COOLERS 5.243E 007 13.11%

AFW aux!LIARY FEEDWATER SYSTEM 5.114E 007 12.78%

DJR OP ACTION

• REDUCE INJECTION 4.770E-007 11.92%

HPR HIGH PRESSURE RECIRCULATION 4.559E-007 11.40%

$80 TRANSFER TO STATION BLACKOUT PRT 4.433E 007 11.08%

LPR LOW PRESSURE RECIRCULATION 3.604E 007 9.01%

XCC CORE UNCOVERED PROBABILITY (SEALLOCA) 2.237E 007 5.59%

ORE OP ACTION - RESTORE EQUIP / SUPPORT SYSTEMS 1.699E 007 4.25 %

SWS SERVICE WATER SYSTEM 1.375E-007 3.44%

CSI CONTAINMENT SPRAY SYSTEM 1.329E-007 3.32%

SAC SAFEGUARDS ACTUATION 17, 18, 19 1.168E-007 2.92%

ESF ENGINEERED SAFETY FEATURES ACTUATICW 1.139E 007 2.85%

CCP CENTRIFUGAL CHARGING PUMPS 1.115E-007 2.79%

CI CONTAINMENT ISOLATION 1.062E 007 2.65%

NPI HIGH PRESSURE INJECTION 9.939E-008 2.48%

i DCB 125V DC BUSES 011-1, 111, 112 5.691E 008 1.42%

CCW CCMPONENT COOLING WATER SYSTEM 5.624E-008 1.41%

OSI OP ACTION - INITIATE SAFETY INJECTION 4.691E-008 1.17%

$1P SAFETY INJECTION PUMPS 3.345E-008 0.84%

CB CONDENSATE BOOSTER PUMPS 3.015E-008 0.75%

RMX RHR HEAT EXCHANGER COOLING 2.692E-008 0.67%

XHR POWER RECOVERY PROBABILITY 1.884E-008 0.47%

RKT REACTOR TRIP 1.404E 008 0.35%

OL PROBABILITY POWER LEVEL LESS THAN 60%

1.373E-008 0.34%

10 TRAkSFER'TO CONSEQUENTIAL SMALL LOCA PRT 1.183E-008 0.30%

• FT TURBINE-DRIVEN aux!LIARY FEEDWAER PUMP 1.042E-008 0.26%

MF FRAC OF TRAN MFW AVAIL UNT!L TT 6.377E-009 0.16%

AM ATWS MITIGATING SYSTEM ACTUATION CIRCUIT 6.377E 009 0.16%

ORS OP ACTION RAPID SG DEPRESS FOR CB INJ 5.478E-009 0.14%

O!B OP ACTION - ISOLATE RHR BREACH 4.532E-009 0.11%

ONC OP ACTION - ESTABLISH NORMAL CHARGING 4.083E-009 0.101 RE RESTORE EQUIPMENT & SUPPORT SYSTEMS 3.932E-009 0.10%

AFI CLOSE ALL FW/AFW VALVES TO RUPT SG 2.860E 009 0.07%

CTT OP ACTION - TURB1kE TRIP OR CLOSE MSIVS 2.474E 009 0.06%

ORF OP ACTION - RESTORE CB 1/OR MFW 1.916E-009 0.05%

OPR OP ACTION - DEPRESS PRIM WITH PRZR PORVS 1.469E 009 0.04%

OHX OP ACTION ESTABLISH CCW TO RHR MX 1.369E-009 0.03%

CAF OP ACTION - ISOLATE FEED TO RUPT SG 1.114E 009 0.03%

SEQ SAFE SHUTDOWN SEQUEkCERS 17, 18, 19 1.103E 009 0.03%

00F OP ACTION - OPEN AFW THROTTLE VALVES 7.853E 010 0.02%

PRV PRESSURIZER PORVS 5.109E-010 0.01%

05 SECONDARY PRESSURE RELIEF 3.843E 010 0.011 TT TURBINE TRIP 3.695E-010 0.01%

YHR POWER RECOVERY PROBABILITY AT 24 HR$

3.634E 010 0.01%

FPR PRIMARY PRESSURE RELIEF 1.993E-010 0.00%

TK REFUELING WATER STORAGE TANK 1.567E 010 0.00%

ALT ALTERNATE FEEDWATER 1.372E-010 0.00%

MSI MAIN STEAM ISOLATION 1.199E-010 0.00%

DP PRESSURIZER PORYS 7.382E-011 0.00%

CAI OP ACTION - ISOLATE STEAM FROM RUPT SG 6.782E 011 0.00%

OS'l OP ACTION RESTORE SW AND ALIGN CCW 4.939E-011 0.00%

ORI OP ACTION - MANUAL CONTROL RCX) INSERTION 1.731E-011 0.00%

TT2 TURBINE TRIP OR ALL MS!VS CLOSE 1.659E-011 0.00%

AC CHARGING PUMP FLOW ALIGNMENTS 1.626E-011 0.00%

CAC OP ACTION - AllGN CHARGING SUCTION 5.600E-012 0.00%

OFW OP ACTION - START AUX FEEDWATER 4.897E-012 0.001 NC NORMAL CHARGlhG 4.355E-012 0.00%

ACC ACCUMULATORS 4.345E-012 0.00%

C FIREWATER TO OPERAflWG CHARG!NG PUMP 4.099E-012 0.00%

JDP OP ACTION - DEPRESS PRIM WITH PRZR PORVs 3.027E-012 0.00%

CRC WOMAL RNR COOLING 2.437E-012 0.00%

DEC OP ACTION - FIREWATER TO CCP OIL COOLER 2.393E-012 0.00%

t'.FW MAIN FEEDWATER STSTEM 1.451E-012 0.00%

ONR OP ACTION ESTABLISH NORMAL RHR COOLING 1.198E 012 0.00%

SGI SEC BREAK INSIDE CTMT !$0 - MS!v + FWIV 1.183E-012 0.00%

CSC OP ACTION STOP CCW PUMPS 6.488E 013 0.00%

BL PRESSURIZER PORVS BLEEDING 4.930E-013 0.00%

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. 052

-OP ACTION - CONTROL RODS TO CORE BOTTON

. 3.229E 013. 0.001.

' CRI CONTROL ROD INSERTION 2.870E-013 ;0.001

NCP

.~PROSA81LITY OF 2/2 CCP AVAIL

2.681E 013 0.00%

asL --

OP ACT10N - DEPRESS PRIM WITH PRZR PORYS 1.482E-013.'O.00%

. OCC OP ACTION - RESTORE CCW 1.461E-013 0.00%

Fat FEEDWATER ISOLAfl0N (FOR BREAK OUTSIDE CONTAINMENT) 8.406E-014.0.00%

VLV

. CHARGING PUMP INJECTION VALVING' 3.560E 014 0.001.

OEB -

. 0P ACTION - EMERGENCY $0RAfl0N '

3.446E 014 0.00%

SW EQUIPMENT 70 RESTORE SW & ALIGN CCW 1.730E-014- 0.00%.

MSR OPEN BREACER OR TRIP MG SET OR INSERT 1.681E 014 0.00%

F52

' FEEDWATER ISOLATION (FOR BREAlt'INSIDE CONTAINMENT) 4.608E 015 0.00%

-i OXR

' OP ACTIDW ECC RECIRC AFTER CORE DAMAGE 3.368E 015' O.00%

ES EMERGENCY BORAT10N -

2.249E 016 0.00%

RCW-EQUIPMENT TO RESTORE CCW 2.620E-017 0.00%>

Tstal plant damage state frequercy = 4.001E 006 i

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l Filos ACCSEQ. REP Length: 80674' bytes Created: Mon Mar 02 10:47:32 1992 DameBe States Report unmary over all irittisting events on 03/02/92 10:47:27 NAME DESCRIPTION FREQUENCY PERCENT AE95 LARGE LOCA; CD 0-2 HR$; ECCS RECIRC FAILS 1.211E-006 30.26%

RL9T SGTR; CD 6 24 HR$; ECCS RECIRC FAILS 1.152E-006 23.79%

LI9S (D) LOOP; CD 2-6 HRS; ECCS RECIRC FAILS 4.209E 007 10.52%

CL95 MED LOCA; CD 6-24 HR$; ECCS RECIRC FAILS 3.761E-007 9.40%

B14$

$80; CD 2-6 HRS; HIGH PRES INJEC FA!LS, SPRAYS WORK 2.385E-007 5.961 BITK

$B0; CD 2-6 HR$; ALL ECCS INJEC FAILS, SPRAYS FAIL 1.799E 007 4.50%

SL95 SHALL LOCA; CD 6-24 HR$; ECCS RECIRC FAILS 1.260E-007 3.15%

AETS LARGE LOCA; CD 0-2 HR$; ALL ECCS INJEC FAILS, SPRAYS FAIL 5.796E-008 1.45%

AE9F LARCE LOCA; CD 0-2 HR$; ECCS RECIRC FAILS 4.953E 008 1.24%

TITA TRANSIENT; CD 2-6 HR$; ALL ECCS INJEC FAILS, SPRAYS FAIL 2.889E-008 0.72%

SE7K SMALL LOCA; CD 0 2 HR$; ALL ECCS INJEC FAILS, SPRAYS FAIL 2.140E-008 0.53%

L19F (D) LOOP; CD 2-6 HR$; ECCS RECIRC FAILS 1.749E 005 0.44%

LL95 (D) LOOP; CD 6-24 HR$; ECCS RECIRC FAILS 1.606E-008 0.40%

KL9F MED LOCA; CD 6-24 HR$; ECCS REClRC FAILS 1.540E-008 0.38%

TE15 ATVS; CD 0 2 HRS; REACTIVITY CNTL FAILS, SPRAYS WORK 1.089E 008 0.27%

SE65 SMALL LOCA; CD 0-2 HR$; ALL ECCS INJEC FAILS, SPRAYS WORK 9.968E-009 0.25%

BI4E

$80; CD 2-6 HR$; NIGN PRES INJEC FAILS, SPRAYS WORK 9.932E 009 0.251 BI7E S80; CD 2 6 HRS; ALL ECCS INJEC FAILS, SPRAYS FAIL 7.492E-009 0.19%

BL95 SED CD 6-24 HR$; ECCS RECIRC FAILS 6.989E-009 0.17%

L19K (D) LOOP; CD 2 6 HR$; ECCS RECIRC FAILS 6.581E-009 0.16%

SI95 SMALL LOCA; CD 2-6 HRS; ECCS REC!RC FAILS 5.240E-009 0.13%

VL90 ISLOCA; CD 6-24 HR$; ECCS RECIRC FAILS 4.531E-009 0.11%

LI45 '

(D) LOOP; CD 2-6 HRS: HIGH PRES INJEC FAILS, SPRAYS WORK 4.100E-009 0.10%

FI7A MED LOCA; CD 2 6 HR$; ALL ECCS INJEC FAILS, SPRAYS FAIL 3.305E-009 0.08%

TE45 ATWS; CD 0 2 HRS; HIGH PRES INJEC FAILS, SPRAYS WORK 2.582E 009 0.06%

AE7F LARGE LOCA; CD 0-2 HRS; ALL ECCS INJEC FAILS, SPRAYS Fall 2,506E-009 0.06%

AE7K LARGE LOCA; ci 0-2 HRS; ALL ECCS INJEC FAILS, SPRAYS FAIL 2.203E-009 0.06%

SL9K SMALL LOCA: CD 6-24 HRS; ECCS REC!RC FAILS 1.926E-009 0.05%

CI95 MED LOCA; CD 2-6 HRS; ECCS RECIRC FAILS 1.866E-009 0.05%

TITF TRANSIENT; CD 2-6 HR$; ALL ECCS INJEC FAILS, SPRAYS FAIL 1.204E 009 0.03%

'L95 SECONDARY BREAK 1.097E-009 0.03%

'.14S TRANSIENT; CD 2 6 HR$; HIGH PRES INJEC FAILS, SPRAYS WORK 1.081E-009 0.03%

A193 LARGE LOCA; CD 2 6 HR$; ECCS RECIRC FAILS 6.030E 010 0.02%

DL95 LOSS OF DC; CD 6-24 HRS; ECCS RECIRC FAILS 4.961E 010 0.01%

LL9F (D) LOOP; CD 6-24 HRS; ECCS RECIRC FAILS 4.481E-010 0.01%

TE1E ATWS; CD 0-2 HR$; REACTIVITY CNTL FAILS, SPRAYS WORK 4.451E-010 0.01%

TL9$

TRANSIENT; CD 6 24 HR$; ECCS RECIRC FAILS 4.240E-010 0.01%

SE6E SMALL LOCA; CD 0 2 HR$; ALL ECCS INJEC FAILS, SPRAYS WORK 4.067E-010 0.01%

SE75 SMALL LOCA; CD 0 2 HR$; ALL ECCS INJEC FAILS, SPRAYS L.L 3.852E 010 0.01%

ML9K MED LOCA; CD 6 24 HR$; ECCS RECIRC FAILS 3.021E-010 0.01%

BL9E

$80; CD 6-24 HRS; ECCS RECIRC FAILS 2.889E 010 0.011 RESIDUAL SUSATION OF ALL PATHS EELOW CUTOFF FREQUENCY 2.295E-010 0.01%

AE9C LARGE LOCA; CD 0 2 HRS; ECCS RECIRC FAILS 2.265E-010 0.01%

LL9E (D) LOOP: CD 6-24 NR$; ECCS REclRC FAILS 2.13SE-010 0.01%

RL7C SGTR; CD 6 24 HR$; ALL ECCS INJEC FAILS, SPRAYS FAIL 1.937E-010 0.00%

LL9C (D) LOOP; CD 6-24 HR$; ECCS RECIRC FAILS 1.684E-010 0.00%

LI4E (D) LOOP; CD 2-6 HRS; HIGH PRES INJEC FAILS, SPRAYS WORK 1.673E-010 0.00%

SE6C SMALL LOCA; CD 0-2 HRS; ALL ECCS INJEC FAILS, SPRAYS WORK 1.517E 010 0.00%

MITF HED LOCA; CD 2-6 HR$; ALL ECCS INJEC FAILS, SPRAYS Fall 1.377E 010 0.00%

ZL7A SECONDARY BREAK 1.317E-010 0.00%

TE4F ATWS; CD 0 2 HR$; HIGN PRES INJEC FAILS, SPRAYS WORK 1.056E-010 0.00%

SL9E SMALL LOCA; CD 6-24 HR; ECCS RECIRC FAILS 9.275E-011 0.00%

SI9K SMALL LOCA; CD 2-6 HRS; ECCS REClRC FAILS 9.197E-011 0.00%

RL6C SGTR; CD 6 24 HR$; ALL ECCS INJEC FAILS, SPRAYS WORK 9.187E 011 0.00%

AI9K LARGE LOCA; CD 2 6 HR$; ECCS RECIRC FAILS 8.781E 011 0.001 D195 LOSS OF DC; CD 2-6 HRS; ECCS RECIRC FAILS 7.912E-011 0.00%

HI9F MED LOCA; CD 2-6 HR$; ECCS RECIRC FAILS 7.660E-011 0.00%

BI7S SB0; CD 2-6 HRS; ALL ECCS INJEC FAILS, SPRAYS FAIL 6.988E-011 0.00%

RL95 SGTR; CD 6-24 HR$; ECCS RECIRC FAILS 4.850E-011 0.00%

2L9F SECONDARY BREAK 4.532E-011 0.00%

TI4E TRANSIENT; CD 2-6 HR$; HIGH PRES INJEC FAILS, SPRAYS WORK 4.373E-011 0.00%

DI7A LOSS OF DC; CD 2-6 HRS; ALL ECCS INJEC FAILS, SPRAYS Fall 4.304E-011 0.00%

014S LOSS OF DC; CD 2 6 HR$; HIGH PRES INJEC FAILS, SFRAYS WORK 3.534E 011 0.00%

E!9K MED LOCA: CD 2-6 HRS; ECCS RECIRC FA!LS 3.015E-011 0.00%

119F LARGE LOCA; CD 2 6 HR$; ECCS RECIRC FAILS 2.772E-011 0.00%

L6K LOSS OF SV; CD 6 24 HR$; ALL ECCS INJEC FAILS, SPRAYS WORK 2.534E 011 0.001 KL9K LOSS OF SW; CD 6-24 HRS; ECCS RECIRC FAILS 2.065E-011 0.00%

DL9E LOSS OF DC; CD 6-24 HR$; ECCS RECIRC FAILS 1.999E-011 0.00%

HI7S HED LOCA; CD 2 6 HR$; ALL ECCS INJEC FAILS, SPRAYS F AIL 1.995E-011 0.00%

L155 (D) LOOP; CD 2-6 HR$; HIGH PRES IHJEC FAILS, SPRAYS FAIL 1.989E-011 0.00%

Ll4K (D) LOOP; CD 2-6 HRS; HIGH PRES INJEC FAILS, SPRAYS WORK 1.72BE-011 0.00%

TL9E TRANSIENT; CD 6 24 HRS; ECCS RECIRC FAILS 1.651E-011 0.00%

SETF SMALL LotA; CD 0-2 HR$; ALL ECCS INJEC FAILS, SPRAYS FAIL 1.355E 011 0.00%

Film: ACCSEQ. REP Length:-80674 bytes Created: Mon Mar 02 10:47:32 1992 SE7E SMALL LOCA; (D 0-2 HRS; ALL ECCS INJEC FAILS, SPRAYS FAIL 1.021E-011 0.00%

SE6F SMALL LOCA; CD 0 2 HR$; ALL ECCS INJEC FAILS, SPRAYS WORK 6.033E-012 0.00%

2L77 SECONDARY BREAK 5.489E-012 0.00%

'E3A ATVS; CD 0 2 HR$; REAC CNTL FAILS, ALL INJEC & SPRAYS FAIL 4.736E 012 0.00%

AE65 LARGE LOCA; CD 0 2 HR$; ALL ECCS INJEC FAILS, SPRAYS WORK 4.624E-012 0.00%

SL9A SMALL LOCA; CD 6-24 HR; ECCS RECIRC FAILS 3.955E-012 0.00%

TL9K TRANSIENT; CD 6 24 HR$; ECCS RECIRC FAILS 3.382E-012 0.00%

TE2s ATWS; CD 0 2 HR$; REACTIVITY CNTL FAILS, SPRAYS FAIL 3.192E-012 0.00%

D19F LOSS OF DC; CD 2-6 HRS; ECCS RECIRC FAILS 2.989E-012 0.00%

LITS (D) LOOP; CD 2-6 HRS; ALL ECCS INJEC FAILS, SPRAYS FAtt 2.450E-012 0.00%

2L9A SECONDARY BREAK 2.301E 012 0.00%

$19E SMALL LOCA; CD 2 6 HRS; ECCS REclRC FAILS 2.182E-012 0.00%

DITE LOSS OF DC; CD 2 6 HRS; ALL ECCS INJEC FAILS, SPRAYS Fall 1.696E 012 0.00%

M16K MED LOCA; CD 2-6 HRS; ALL ECCS INJEC FAILS, SPRAYS WORK 1.340E-012 0.00%

2L65 SECONDARY BREAK 1.224E 012 0.00%

Dl4E LOSS OF DC; CD 2-6 HR$; HICH PRES INJEC FAILS, SPRAYS WORK 1.172E-012 0.00%

D19K Loss OF DC; CD 2-6 HR$; ECCS REclRC FAILS 1.135E-012 0.00%

B14K

$80; CD 2*6 HR$; HIGN PRES INJEC FAILS, SPRAYS WORK 1.075E 012 0,00%

XL6E LOSS OF SW; CD 6-24 HR$; ALL ECCS INJEC FAILS, SPRAYS WORK 9.424E-013 0.00%

XL9E LOS$ OF SW; CD 6 24 HR$; ECCS RECIRC FAILS 7.859E 013 0.00%

TE75 ATVS; CD 0-2 HR$; ALL ECCS INJEC FAILS, SPRAYS FAIL 7.129E 013 0.00%

MI65 MED LOCA; CD 2 6 HR$; ALL ECCS INJEC FAILS, SPRAYS WORK 6.735E-013 0.00%

LISE (D) LOOP; CD 2-6 HR$; HICH PRES INJEC FAILS, SPRAYS FAIL 5.760E-013 0.00%

RL9K SGTR; CD 6-24 HR$; ECCS RECIRC FAILS 5.286E-013 0.001 XL7K LOSS OF SW; CD 6-24 HR5; ALL ECCS INJEC FAILS, SPRAYS Fall 4.960E-013 0.00%

AE6C LARGE LOCA; CD 0-2 HRS; ALL ECCS INJEC FAILS, SPRAYS WORK 3.689E 013 0.00%

VE7D ISLOCA; CD 0 2 HR$; ALL ECCS INJEC FAILS, SPRAYS FAIL 2.815E-013 0.00%

XI4K LOSS OF SW; CD 2-6 HRS; HICH PRES INJEC FAILS, SPRAYS WORK 2.118E-013 0.00%

TI5S TRANSIENT; CD 2 6 HRS; HIGH PRES INJEC FAILS, SPRAYS FAIL 2.097E-013 0.001 TE7A ATWS; CD 0-2 HR$; ALL ECCS INJEC FAILS, SPRAYS FAIL 1.982E-013 0.00%

L15K (D) LOOP; CD 2 6 HR$; HIGH PRES INJEC FAILS, SPRAYS FAIL 1.58SE-013 0.00%

LITA (D) LOOP; CD 2-6 HRS; ALL ECCS INJEC FAILS, SPRAYS FAIL 1.586E-013 0.00%

Tl4K TRANS!ENT; CD 2-6 HRS; HICH PRES INJEC FAIL $, SPRAYS WORK 1.51DE-013 0.00%

AE6F LARCE LOCA; CD 0-2 HR5; ALL ECCS INJEC FAILS, SPRAYS WORK 1.082E-013 0.00%

TL9F TRANSIENT; CD 6 24 HR$; ECCS RECIRC FAILS 1.022E 013 0.00%

Total plant damage statt fregency 4.001E-006 1

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Pilo: ACCSEQ REP Length: 80674 bytes Cronted: Mon Mar 02 10:47:32 1992

+

Dominant Sequence Report luumery oser all initiating events on 03/02/92 10:47:27 Tetzt plant damage state frequency = 4.000641E-006 NUMBER FREQUENCT PERCENT SUPPORT ST DAMAGE ST EVENT VALUE DESCRIPTION 1.

6.087E-007 15.21% 1 AE95 LLOCA 3.000E-004 LARGE LOCA INITIATING EVENT ORC 2.160E-003 OP ACTION - ESTAB LOW PRESSURE ECC RECIRC (LLOCA W/ SPRAT) 2.

4.092E 007 10.23 % 1 AE95 LLOCA 3.000E-004 LARGE LOCA INITIATING EVENT LPI 1.450E-003 1/2 LOW PRESSURE INJ PMPS TO 2/3 C LEGS ALL POWER ORT 1.000E+000 RWST REFILL NOT POSSIBLE FOR LARGE LOCA WITH CURRENT E0Ps 3.

3.962E 007 9.90% 98 LI95 DLOOP 1.400E-002 DUAL UNIT LCSS OF OFFSITE POWER INITIATING EVENT SUS 2.230E-003 AC POWER WITH DLOSP 148,149 Fall AFW 1.450E 0G2 1/3 AUX FEED PMPS TO 4/4 SG WO POWER FC 9.847E 001 2/5 FAN COOLERS (1 FC15)

HPR 1.000E+000 1/4 HIGH PRESSURE RECIRC 70 2/4 C LEGS NO POWER RTK 1.000E+000 EQUIPMENT TO REFILL THE RWST (POWER UNAVAILABLE) 4.

3.891E-007 9.73 % 1 RL9T SGTR 9.020E-003 STEAM GENERATOR TUBE RUPTURE INITIATING EVENT CDS 1.150E-003 OP ACTION

• SG DEPRES FOR PRIM COOLING (0052)

ORT 3.800E-002 OP ACTIDW - REFILL THE RWST 5.

2.751E-007 6.88% 1 RL9T SGTR 9.020E-003 STEAM GENERATOR TUBE RUPTURE INITIATING EVENT CIR 8.140E-004 OP ACTION - MINIMIZE ECCS FLOW ORT 3.800E-002 OP ACTION - REFILL THE RWST 6.

2.472E-007 6.18% 1 RL97 SGTR 9.020E-003 STEAM GENERATOR TUBE RUPTURE INITIATING EVENT 005 1.150E-003 OP ACTION

• SG DEPRES FOR PRIM COOLING (0052)

RTK 2.510E-002 EQUIPMENT TO REFILL THE RWST (SGTR) 7.

1.748E-007 4.37% 1 RL9T SGTR 9.020E-003 STEAM GENERATOR TUBE RUPTURE INITIATING EVENT CIR 8.140E-004 OP ACTION - MINIMl2E ECCS FLOW RTK 2.510E-002 EQUIPMENT TO REFILL THE RWST (SGTR) 8.

1.526E-007 3.811 1 ML95 MLOCA 1.100E 003 MEDIUM LOCA INITIATING EVENT LPR 5.200E-004 1/2 LOW PRESSURE RECIRC 70 2/4 C LECS ALL POWER (COND)

RTK 2.910E-001 EQUIPMENT TO REFILL THE RWST FOR LOCAs (RTK,,ALL+0.25) 9.

1.44BE-007 3.62% 1 AE95 LLOCA 3.000E-004 LARGE LOCA INITIATING EVENT LPR 5.150E-004 1/2 LOW PRESSURE RECIRC TO 1/3 C LEGS ALL POWER (CONO)

ORT 1.000E+000 RWST REFILL NOT POSSIBLE FOR LARCE LOCA WITH CURRENT E0Ps

10. 1.254E-007 3.13% 1 ML9S MLOCA 1.100E 003 MEDIUM LOCA INITIATING EVENT ORC 4.270E 004 OP ACTION - ESTAB LOW PRESSURE ECC RECIRC RTK 2.910E-001 EQUIPMENT TO REFILL THE RWST FOR LOCAs (RTK_ALL+0.25)

11. 1.171E-007 2.93% 198 BI4s OLOOP 1.400E 002 OUAL UNIT LOSS OF 0FFSITE POWER INITIATING EVENT j

BUS 3.090E-004 AC POWER WITN OLOSP 147,148,149 Fall i

SB0 1.000E+000 LOSP,'AC UNAVAILABLE, TRANSFER 70 STATION BLACK 0UT

-J XCC 4.090E-002 CORE UNCOVERED PRIOR TO POWER RECOVERT AT 24 HRS (SEALLOCA

12. 8.786E 008 2.20% 198 BITK DLOOP 1.400E-002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT BUS 3.090E 004 AC POWER WITH DLDSP 147,148,149 FAIL i'

SB0 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT ORE 3.090E-002 OP ACTION - RESTORE EQUIPLSUPPORT SYSTEMS

13. 7.954E 008 1.99% 1 SL95 SLOCA 6.800E-003 SMALL LOCA INITIATING EVENT LPI 4.220E-005 1/2 RHR PUMPS ON MINIFLOW ALL POWER RTK 2.910E 001 EQUIPMENT TO REFILL THE RWST FOR LOCAs (RTK,ALL+0.25) 14 5.691E-008 1.421 63 AE75 LLOCA 3.000E-004 LARGE LOCA INITIATING EVENT ESF 2.040E-004 ESFAS NO OPER ACTION BOTH TRAINS FAIL SAC 1.000E+000 MANUAL ACTUATION OF EQUIPMENT NOT MCDELED FOR LARGE LOCA LPI 1.000E+000 1/2 LOW PRESSURE INJ PMPS 70 2/3 C LEGS NO POWER HPl 1.000E+000 1/4 HIGH PRESSURE INJ PMPS TO 2/3 C LEGS NO POWER CSI 1.000E+000 1/3 CONTAINMENT SPRAT PUMPS NO POWER AVAIL

15. 4.846E 008 1.211 1 ML9S MLOCA 1.100E-003 MEDIUM LOCA INITIATING EVENT LPI 1.650E-004 1/2 LOW PRESSURE INJ PMPS TO 2/4 C LEGS ALL POWER (COND)

RTK 2.910E-001 EQUIPMENT TO REFILL THE RWST FOR LOCAs (RTK,,ALL+0.25)

16. 2.856E-005 0.71% 104 TITA GTR 3.000E+000 GENERAL TRANSIENT INITIATING EVENT DCB 6.980E-007 DC POWER W/05 011-1,111,112 FAIL-ALL POWLR AFW 1.430E-002 1/3 AUX FEED PMPS TO 4/4 SG WO POWER CB 1.000E+000' 1/4 COND BOOSTER PMPS TO 1/4 SGS - LDSS OF 011 1 OR LOSP

Filo: ACCSEQ. REP Length:'80674 bytes Crcatcd:-Mon Mar 02 10:47:32 1992 051 1.000E+000 OP ACTION - INITIATE SAFETY INJECTION (ESFAS NOV FAILED) i HPl 1.000E+000 1/4 HIGH PRES $URE INJ PMPS TO 2/4 C LEGS NO POWER FC 1.000E+000 1/5 FAN COOLERS NO POWER CSI 1.000E+000 1/3 CONTAIMMENT SPRAY PUMPS NO POWER AVAIL LPI 1.000E+000 1/2 LOW PRESSURE INJ PMPS TO 2/4 C LEGS NO POWER

17. 2.738E 008 0.68% 1 RL9T SGTR 9.020E 003 STEAM GENERATOR TUBE RUPTURE INITIATING EVENT CCP 2.660E-003 1/2 CCPs INJECTING 70 2/4 C LEGS ALL POWER

/

CDS 1.150E 003 CP AC110N SG DEPRES FOR PRIM COOLING (00S2)

18. 2.490E 008 0.62% 1 AE9F LLOCA 3.000E-004 LARGE LOCA INITIATING EVENT ORC 2.160E 003 OP ACTION - ESTAB LOW PRESSURE ECC RECIRC (LLOCA W/ SPRAY)

C1 3.930E-002 CONTAlWMENT ISOLATION (ESFAS SUCCESS, SPRAT ACTUATED)

19. 2.293E-008 0.57% 198 Bl4S DLOOP 1.400E-002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT BUS 3.090E 004 AC POWER WITH DLOSP 147,148,149 Fall SWS 1.440E 001 SERVICE WATER W/DLCSP-NO POWER 580 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT XCC 4.090E 002 CORE UNCOVERED PRIOR TO POWER REC 0 VERT AT 24 NRS (SEALLOCA)

20. 2.072E 008 0.52% 1 ML95 MLOCA 1.100E 003 MEDIUM LOCA INITIATING EVENT LPR 5.200E 004 1/2 LOW PRESSURE RECIRC TO 2/4 C LEGS ALL POWER (COND)

ORT 3.800E 002 CP ACTION - REFILL THE RWST

21. 1.936E-008 0.48% 1 RL97 SGTR 9.020E-003 STEAM GENERATOR TUBE RUPTURE INITIATING EVENT CCP 2.660E-003 1/2 CCPs INJECTING TO 2/4 C LECS ALL POWER OIR 8.140E-004 OP ACTION - MINIMlZE ECCS FLOW

22. 1.922E-008 0.48% 198 B14E DLOOP 1.400E 002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT BUS 3.090E 004 AC POWER WITM OLOSP 147,148,149 Fall CCV 1.410E-001 COMPONENT COOLING WATER W/DLCSP Wo POWER

$80 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT XCC 4.090E-002 CORE UNCOVERED PRIOR TO POWER RECOVERT AT 24 NRS (SEALLOCA)

23. 1.721E 008 0.43% 198 B17K DLOOP 1.400E-002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT BUS 3.090E 004 AC POWER WITH DLOSP 147,148,149 Fall SVS 1.440E-001 SERVICE WATER W/DLOSP-WO POWER

$B0 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT ORE 3.090E-002 OP ACTION - RESTORE EQUIP & SUPPORT STSTEMS 24 1.702E 008 0.43% 1 ML95 MLOCA 1.100E-003 MEDIUM LOCA INITIAT!ba EVENT ORC 4.270E 004 OP ACTION - ESTAB LOW PRESSURE ECC RECIRC ORT 3.800E 002 CP ACTION - REFILL THE RWST

25. 1.674E-008 0.42% 1 AE9F LLOCA 3.000E-004 LARGE LOCA INITIATING EVENT LPI 1.450E 003 1/2 LOW PRESSURE INJ PMPS TO 2/3 C LEGS ALL POWER ORT 1.000E+000 RWST REFILL NOT POSSIBLE FOR LARGE LOCA WITH CURRENT E0Ps CI 3.930E-002 CONTAINMENT ISOLATION (ESTAS SUCCESS, SPRAY ACTUATED)

26. 1.621E-005 0.41% 98 L19F DLOOP 1.400E 002 DUAL UNIT Lost OF 0FFSITE POWER INITIATING EVENT BUS 2.230E-003 AC POWER WITH DLOSP 148,149 FAIL AFW 1.450E-002 1/3 AUX FEED PMPS TO 4/4 SG No POWER FC 9.847E-001 2/5 FAN COOLERS (1-FC15)

HPR 1.000E+000 1/4 HIGN PRESSURE RECIRC 70 2/4 C LEGS No POWER RTE 1.000E+000 EQUIPMENT TO REFILL THE RWST (POWER UNAVAILABLE)

Cl 3.930E-002 CONTAINMENT ISOLATION (ESFAS SUCCESS, SPRAY ACTUATED)

27. 1.565E-008 0.39% 98 L195 DLOOP 1.400E-002 DUAL UNIT Loss 0F OFFSITE POWER INI MATlWG EVENT BUS 2.230E 003 AC POWER WITH DLCSP 148,149 FAIL AFW 1.450E 002 1/3 AUX FEED PMPS TO 4/4 SG NO POWER FC 9.847E 001 2/5 FAN COOLERS (1 FC15)

HPR 1.000E+000 1/4 HIGH PRESSURE RECIRC TO 2/4 C LEGS NO POWER ORT 3.800E 002 OP ACTION - REFILL THE RWST

28. 1.442E-008 0.36% 198 BITK DLOOP 1.400E-002 DUAL UNIT LOSS OF 0FFSITE POWER INITIATING EVENT BUS 3.090E 004 AC POWER WITH DLOSP 147,148,149 FAIL CCW 1.410E 001 COMPONENT COOLING WATER W/DLOSP-WO POWER

$80 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT ORE 3.090E-002 OP ACTION - RESTORE EQUIP 1 SUPPORT STSTEMS

29. 1.411E-008 0.35% 63 SE7K SLOCA 6.800E-003 SMALL LOCA INITIAftWG EVENT ESF 6.670E-005 ESTAS W/0P ACTION-BOTH TRAINS FAIL SAC 3.160E 002 MANUAL ACTUATION OF SAFEGUARDS EQUIPMENT (RE,580+0RE_SBO)

CCP 1.000E+000 1/2 CCPs INJECTING TO 2/4 C LEGS NO POWER

$1P 1.000E+000 1/2 SAFETY INJECTION PMPS TO 2/4 C LEGS NO POWER LPI 1.000E+000 1/2 LOW PRESSURE INJ PMPS TO 2/4 C LEGS 147 AVAIL FC 1.000E+000 1/5 FAN COOLERS NO POWER CSI 1.000E+000 1/3 CONTAINMENT SPRAT PLMPS NO POWER AVAIL

30. 1.399E-008 0.35% 61 AE9S LLOCA 3.000E-004 LARGE LOCA ! NIT!ATING EVENT

i I

File:.ACCSEQ. REP Length: 80674

' bytes Cractsd: Mon-Mar 02 10:47:32 1992-SAC 5.150E-005 SAF ACT 18,19 FAIL ONE ESFAS AVAll LPI 1.000E+000 1/2 LOW PRESSURE INJ PMPS TO 2/3 C LEGS NO POWER ORT 1.000E+000 RWST REFILL NOT POSSIBLE FOR LARGE LOCA WITH CURRENT EDPs '

31. 1.349E 008 0.34% 198 BI45 DLOOP 1.400E-002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT SUS 2.200E 003 AC POWER WITH DLOSP 147,148 FAIL SWS 1.190E-002 SERVICE WATER W/DLOSP 1471148 FAIL.

$80 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT XCC 4.090E 002 CORE UNCOVERED PRIOR TO POWER RECOVERY AT 24 HR$ (SEALLoct

32. 1.080E-008 0.27% 1 SL95 SLOCA 6.800E 003 SMALL LOCA INITIATING EVENT LPI 4.220E-005 1/2 RHR PUMPS ON MIN! FLOW ALL POWER ORT 3.800E-002 OP ACTION - REFILL THE RWST

33. 1.016E-008 0.25% 98 LL95 DLOOP 1.400E-002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT BUS 2.230E-003 AC POWER WITH DLOSP 148,149 FAIL AFW 1.450E 002 1/3 AUX FEED PMPS TO 4/4 SG No POWER FC 9.847E 001 2/5 FAN COOLERS (1-FC15)

CSI 2.500E 002 1/3 CONTAINMENT SPRAY PUMPS 147 AVAIL RMX 1.000E+000 2/2 RNR HEAT EXCHANGERS 148 OR 149 FAILED RTK 1.000E+000 EQUIPMENT TO REFILL THE RWST (POWER UNAVAILABLE)

34. 1.012E-008 0.25% 198 BI7K DLOOP 1.400E-002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT BUS 2.200E-003 AC POWER WITH DLCSP 147,148 FAIL SWS 1.190E-002 SERVICE WATER W/DLOSP 1471148 FAIL

$80 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT ORE 3.090E 002 OP ACT!DN - RESTORE EQUIP & SUPPORT SYSTEMS

35. 9.492E 009 0.24% 196 SE65 DLOOP 1.400E 002 DUAL UNIT LOSS OF QFFSITE POWER INITIATING EVENT BUS 2.230E-003 AC POWER WITH DLOSP 148,149 FA!L CCW 5.440E-003 COMPOWENT COOLING WATER W/DLOSP-148&149 FAIL SLO 6.190E-002 CONSEQUENTIAL SMALL LOCA NO SW/CCW (EC_LSCX+0EC_LSC+5LO,2)

CCP 1.000E+000 1/2 CCPs INJECTING TO 2/4 C LECS NO POWER SIP 1.000E+000 1/2 SAFETY INJECTIDW PMPS TO 2/4 C LEGS NO POWER LPI

?.000E+000 1/2 LOW PRESSURE INJ PMPS 70 2/4 C LEGS NO POWER

36. 8.033E-009 0.20% 1 SL9$

SLOCA 6.800E 003 SMALL LOCA INITIATING EVENT-CCP 2.660E-003 1/2 CCPs INJECTING fo 2/4 C LEGS ALL POWER LPR 4.480E-004 1/2 LOW PRESSURE RECIRC TO 2/4 C LEGS ALL POWER (COND)

37. 7.659E-009 0.19% 1 SL95 SLOCA 6.800E-003 SMALL LOCA INITIATING EVENT CCP 2.660E 003 1/2 CCPs INJECTING TO 2/4 C LEGS ALL POWER ORC 4.270E-004 CP ACTION

• ESTAB LOW PRESSURE ECC RECIRC

38. 7.341E-009 0.18% 195 B17K DLOOP 1.400E-002 DUAL UNIT LOSS OF OFF5tTE POWER INITIATING EVENT BUS 3.090E 004 AC POWER WITH DLOSP 147,148,149 FAIL

$80 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT XHR 2.470E 003 POWER RECOV FAILURE PROB AT 24 HR$ (TD & DS)

39. 7.313E-009 0.18% 198 8145 DLOOP 1.400E 002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT BUS 3.090E 004 AC POWER WITH DLDSP 147,148,149 Fall 5B0 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER 70 STATION BLACKOUT CCP 2.660E 003 1/2 CCPs INJECTING TO 2/4 C LEGS ALL POWER

40. 6.721E-009 0.17% 198 814S DLOOP 1.400E-002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT Bus 2.230E-003 AC POWER WITH DLOSP 148,149 FAIL SWS 5.850E*003 SERVICE WATER W/DLOSP 1481149 FAIL

$80 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER 10 STATION BLACKOUT XCC 4.090E 002 CORE UNCOVERED PRIOR TO POWER RECOVERY AT 24 HRS (SEALLOCA

41. 6.577E-009 0.16% 1 ML95 MLOCA 1.100E 003 MEDIUM LOCA INITIATING EVENT LPI 1.650E 004 1/2 LOW PRESSURE INJ PMPS To 2/4 C LECS ALL POWER (CONO)

ORT 3.800E-002 OP ACTION REFILL THE RWST

42. 6.540E-009 0.16% 198 8145 DLOOP 1.400E-002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT BUS 2.170E-003 AC POWER WITH DLOSP 147,149 Fall SVS 5.850E-003 SERVICE WATER W/DLOSP 147&149 FAIL

$80 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATIDW BLACKOUT XCC 4.090E-002 CORE UNCOVERED PRIOR 70 POWER RECOVERY AT 24 HRS (SEALLOCA

43. 6.331E 009 0.16% 1 TEtt GTR 3.000E+000 GENERAL TRANSIENT INITIATING EVENT RXT 2.620E-006 FAILURE OF REACTOR TRIP PL 4.890E-001 POWER LEVEL LESS THAN 60 PERCENT AFW 2.640E-003 1/1 AUX FEED TDP OR 2/2 MDP TO 1/4 SGS (DPEN THRTL VALVES) 44 6.243E 009 0.16% 1 ML9F MLOCA 1.100E-003 MEDIUM LOCA INITIATING EVENT LPR 5.200E-004 1/2 LOW PRESSURE RECIRC TO 2/4 C LEGS ALL POWER (COWD)

RTK 2.910E 001 EQUIPMENT TO REFILL THE RWST FOR LOCAs (RTK_ALL+0.25)

CI 3.930E-002 CONTAINMENT ISOLATION (ESFAS SUCCESS, SPRAY ACTUATED)

,g s

Files ACCSEQ. REP ~

. Length: 80674.

bytes

CrGatsd ' Mon Mar 02.10 47 32 1992

45. 6.201E-009 0.151 98

.L195-LOOP 3.200E-002 LOSS OF OFFSITE POWER INITIATING EVENT BUS 1.510E 005 AC POWER WITH LOSP 148,149 FAIL AFW 1.450E 002 1/3 AUX FEED PMPS TO 4/4 SG No POWER FC 9.847E 001 2/5 FAN COOLERS (1 FC15)

HPR 1.000E+000 ' 1/4 HIGH PRESSURE RECIRC TO 2/4 C LEGS NO POWER RTK 1.000E+000 EQUIPMENT TO REFILL THE RWST (POWER UNAVAILABLE)

46. 6.193E 009 0.15% 198 B148 DLOOP 1.400E 002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT

' BUS 4.790E 002 AC POWER WITH DLOSP 148 FAILS SWS 2.510E-004 SERVICE WATER W/DLOSP 148 FAILED

- SB0 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACK 0UT XCC 4.090E 002 CORE UNCOVERED PRIOR TO POWER REC 0 VERT AT.24 HR$ (SEALLOCA

47. 6.152E-009 0.15% 98 L19K DLOOP 1.400E-002 DUAL UNIT Loss OF 0FFSITE POWER INITIATING EVENT BUS 2.230E-003 AC POWER WITH DLCSP 148,149 FAIL AFW 1.450E 002 1/3 AUX FEED PMPS TO 4/4 SG No POWER FC 1.530E-002 1/5 FAN COOLERS 147 AVAll RNX 1.000E+000 2/2 RHR HEAT EXCHANGERS 148 OR 149 FAILED

+

HPR 1.000E+000 1/4 HIGH PRESSURE RECIRC TO 2/4 C LEGS NO POWER RTK 1.000E+000 EQUIPMENT To REFILL THE RWST (POWER UNAVAILABLE)

)

48, 5.986E-009 0.15% 198 B145 DLOOP 1.400E-002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT BUS 4.630E 002 AC POWER WITH DLOSP 147 FAILS-SWS 2.510E 004 SERVICE WATER W/DLOSP 147 FAILED 580 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT XCC 4.090E 002 CORE UNCOVERED PRIOR TO POWER RECOVERY AT 24 HR$ (SEALLOCA-

49. 5.924E-009 0.15% 1 AE9F LLOCA 3.000E 004 LARGE LOCA INITIATING EVENT LPR 5.150E 004 1/2 LOW PRESSURE RECIRC TO 1/3 C LEGS ALL POWER (COND)

ORT 1.000E+000 RWST REFILL NOT POSSIBLE FOR LARGE LOCA WITH CURRENT EDPs-CI 3.930E 002 CONTAINMENT ISOLATION (ESFAS SUCCESS, SPRAT ACTUATED)

50. 5.334E-009 0.13% 1 AE9s LLOCA 3.000E-004 LARGE LOCA INITIATING EVENT ESF 8.610E-003 ESFAS NO OPER ACTION-ONE TRAIN FAILS ORC 2.160E-003 OP ACTION ESTAB LOW PRESSURE ECC RECIRC (LLOCA W/ SPRAY).

51. 5.334E 009 -0.13% 1 AE9s LLOCA 3.000E-004 LARGE LOCA INITIATING EVENT ESF 8.610E-003 ESFAS NO OPER ACTION ONE TRAIN FAILS ORC 2.160E 003 OP ACTION - ESTAB LOW PRESSURE ECC RECIRC (LLOCA W/ SPRAY)

52. 5.187E-009 0.13% 200 814S LOOP 3.200E-002 Lost 0F OFFSITE POWER INITIATING EVENT DCB 1.960E 007 DC POWER WITH LOSP 011 1,111,112 FAIL 580 1.000E+000 LDSP, AC UNAVAILABLE, TRANSFER TO STAT!DN BLACKOUT e

OSI 1.000E+000 OP ACTION - INITIATE SAFETY INJECTION (ESFAS HDW FA! LED) 53, 5.129E 009 0.13% 1 ML9F MLOCA 1.100E 003 MEDIUM LOCA !NITIATING EVENT ORC 4.270E 004 OP ACTION - ESTAB LOW PRESSURE ECC RECIRC RTK 2.910E 001 EQUIPMENT TO REFILL THE RWST FOR LOCAs (RTC ALL+0.25)

C1 3.930E 002 CONTAINMENT ISOLAT10N (ESFAS SUCCESS, SPRAY ACTUATED) l

~

54 5.044E 009 0.13% 198 B17K DLOOP 1.400E 002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT-BUS 2.230E-003 AC POWER WITH DLOSP 148,149 FAIL SWS 5.850E 003 SERVICE WATER W/DLOSP 148&149 FAIL

$80 1.000E+C00 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT ORE 3.090E 002 OP ACTION RESTORE EQUIP & SUPPORT SYSTEMS 55, 4.908E-009 0.121 198 Bl7K DLOOP 1.400E 002 DUAL UNIT LOSS OF 0FFSITE POWER INITIATlWG EVENT-BUS 2.170E 003 AC POWER WITH DLOSP 147,149 Fall SWS 5.850E 003 SERVICE WATER W/DLOSP 1478149 Fall

$80 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT ORE 3.090E 002 OP ACTION RESTORE EQUIP & SUPPORT SYSTEMS

56. 4.878E 009 0.12% 198 BI4E DLOOP 1.400E-002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT BUS 3.090E 004 AC POWER WITH DLDSP 147,148,149 FAIL

$80 1.000E+000 'LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT' XCC 4.090E-002 CORE UNCOVERED PRIOR TO POWER RECOVERY AT 24 HR$ (SEALLOCA C1 4.000E-002 CONTAINMENT !$0LAT!DN (ESFAS FAILED, $ PRAY ACTUATED)

57. 4.673E-009 0.12% 104 SE7K SLOCA 6.800E 003 SMALL LOCA INITIATING EVENT DCB 6.980E-007 DC POWER W/OS 011 1,111,112 FAIL-ALL POWER CCP 1.000E+000 1/2 CCPs !NJECTING TO 2/4 C LECS NO POWER

$1P 1.000E+000. 1/2 SAFETT INJECTION PMPS 70 2/4 C LEGS NO POWER-LPI 1.000E+000 1/2 LOW PRESSURE INJ PMPS 70 2/4 C LEGS 147 AVAIL FC 1.000E+000 1/5 FAN COOLERS No POWER CSI 1.000E+000 1/3 CONTAINMENT SPRAY PUMPS NO POWER AVAll

58. 4.648E 009 0.12% 198 817K DLOOP 1.400E 002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT

{

BUS 4.790E-002 AC POWER WITH DLCSP 148 FAILS SWS 2.510E-004 SERVICE WATER W/DLOSP 148 FA! LED SBD 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT I

~

Filos ACCSEQ. REP Length: 80674 bytes Cracteds Mon Mar.02 10:47:32-1992 ORE 3.090E 002 OP ACTION - RESTORE EQUIP & SUPPORT STSTEMS

$9. 4.493E-009 0.11% 198 B17K DLOOP 1.400E 002 DUAL UNIT LOSS OF 0FFSITE POWER INITIATING EVENT BUS 4.630E 002 AC POWER WITH OLOSP 147 FAILS SWS 2.510E 004 SERVICE WATER W/0LOSP-147 FAILED

$80 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT ORE 3.090E 002 OP ACTION - RESTORE EQUIP & SUPPORT STSTEMS

60. 3.747E-009 0.09% 198 BI7K DLOOP 1.400E 002 DUAL UNIT LOSS OF OFFSITE POWER !NITIATING EVENT SUS 3.090E-004 AC POWER WITH DLOSP 147,148,149 FAIL

$80 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT XCC 4.090E 002 CORE UNCOVERED PRIOR TO POWER RECOVERY AT 24 HRS (SEALLOCA ORE 3.090E 002 CP ACTION - RESTORE EQUIP & SUPPORT SYSTEMS

61. 3.697E-009 0.09% 21 AE9S LLOCA 3.000E-004 LARGE LOCA INITIATING EVENT SAC 8.830E 004 SAF ACT 18 FAILS-ONE ESFAS AVAIL LPR 1.490E 002 1/2 LOW PRESSURE RECIRC TO 1/3 C LEGS 149 AVAIL ORT 1.000E+000 kWST REFILL NOT POS$1BLE FOR LARGE LOCA WITH CURRENT E0Ps

62. 3.693E-009 0.09% 10 AE95 LLOCA 3.000E 004 LARGE LOCA INITIATING EVENT SAC 8.830E-004 SAF ACT 19 FAILS-CNE ESFAS AVAIL LPR 1.490E 002 1/2 LOW PRESSURE RECIRC TO 1/3 C LECS 148 AVAIL ORT 1.000E+000 RWST REFILL NOT POSSIBLE FOR LARGE LOCA WITH CURRENT E0Ps

63. 3.661E-009 0.09% 198 Bt7E DLOOP 1.400E 002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT' BUS 3.090E 004 AC POWER WITH DLOSP 147,148,149 FAIL

$80 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT ORE 3.090E 002 OP ACTION + RESTORE EQUIP 1 SUPPORT STSTEMS CI 4.000E 002 CONTAINMENT ISOLATION (ESFAS FAILED, SPRAY ACTUATED)

64. 3.586E-009 0.09% 1 AE95 LLOCA 3.000E-004 LARGE LOCA INITIATING EVENT ESF 8.610E 003 ESFAS No OPER ACTION-ONE TRAIN FAILS LPI 1.450E 003 1/2 LOW PRESSURE INJ PMPS 70 2/3 C LEGS ALL POWER ORT 1.000E+000 RWST REFILL NOT POS$1BLE FOR LARGE LOCA WITH CURRENT E0Ps

65. 3.586E 009 0.09% 1 AE95 LLOCA 3.000E 004 LARGE LOCA INITIATING EVENT ESF 8.610E 003 ESTAS NO OPER ACTION-ONE TRAIN FAILS LPI 1.450E-003 1/2 LOW PRESSURE INJ PHPS 70 2/3 C LEGS ALL POWER ORT 1.000E+000 kWST REFILL NOT POSSIBLE FOR LARGE LOCA WITH CURRENT E0Ps

66. 3.343E 009 0.08% 1 TE1s GTR 3.000E+000 GENERAL TRANSIENT INITIATING EVENT RXT 2.620E 006 FAILURE OF REACTOR TRIP PL 4.890E 001 POWER LEVEL LESS THAN 60 PERCENT MF 3.460E 001 FRACTION OF TRANSIENTS MAIN FEED AVAIL UNTIL TURBINE TRIP AM 1.000E+000 ATWS MITICATING STSTEM ACTUATION CIRCUIT AFW 2.640E-003 1/1 AUX FEED TDP OR 2/2 MOP To 1/4 SGS (OPEN THRTL VALVES)

67. 2.843E-009 0.07% 1 SL95 SLOCA 6.800E 003 SMALL LOCA INITIATING EVENT RMX 3.370E 003 2/2 RHR HEAT EXCHANGERS 148&149 AVAILABLE (COND)

LPR 4.480E 004 1/2 LOW PRESSURE RECIRC TO 2/4 C LECS ALL POWER (COND)

RTK 2.910E-001 EQUIPMENT TO REFILL THE RWST FOR LOCAs (RTK_ALL+0.25)

68. 2.788E-009 0.07% 27 RL9T SGTR 9.020E 003 STEAM GENERATOR TUBE RUPTURE INITIATING EVENT BUS 2.860E 004 AC PCNER WITH OFFSITE 147 FAILS ODS 1.150E 003 OP ACTION - SG DEPRES FOR PRIM COOLING (0052)

RTK 1.000E+000 EQUIPMENT TO REFILL THE RVST (POWER UNAVAILABLE)

69. 2.711E-009 0.07% 1 SL95 SLOCA 6.800E 003 SMALL LOCA INITIATING EVENT RMX 3.370E 003 2/2 RHR HEAT EXCHANGERS 148&149 AVAILABLE (COND)

ORC 4.270E 004 OP ACTION ESTAB LOW PRESSURE ECC RECIRC RTK 2.910E 001 EQUIPMENT TO REFILL THE RWST FOR LOCAs (RTK_ALL+0.25) 70, 2.680E-009 0.07% 198 B145 DLOOP 1.400E-002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT BUS 3.090E 004 AC POWER WITH DLOSP 147,148,149 FAIL

$80 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER To STATION BLACKOUT AFT 1.540E 002 1/1 AUX FEED TDP TO 4/4 SGS XHR 6.150E-002 POWER RECOV FAILURE PROS AT 2 HR$ (TD FAIL)

71. 2.651E 309 0.07% 198 BI4s DLOOP 1.400E-002 DUAL UNIT LOSS OF 0FFSITE POWER INITIATING EVENT BUS 3.090E 004 AC POWER WITH DLOSP 147,148,149 FAIL l

$80 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT OSI 9.660E-004 OP ACTION INITIATE SAFETT INJECTION

72. 2.371E-009 0.06% 63 AE7F LLOCA 3.000E-004 LARGE LOCA INITIATING EVENT ESF 2.040E-004 ESFAS NO OPER ACTION-BOTH TRAINS Fall SAC 1.000E+000 MANUAL ACTUATION OF EQUIPMENT NOT MODELED FOR LARGE LOC LPI 1.000E+000 1/2 LOW PRESSURE INJ PMPS TO 2/3 C LEGS NO POWER HPl 1.000E+000 1/4 HIGH PRESSURE INJ PMPS TO 2/3 C LECS NO POWER CSI 1.000E+000 1/3 CONTAINMENT SPRAY PUMPS NO POWER AVAIL Cl 4.000E 002 CONTAINMENT ISOLATION (ESFAS FAILED, SPRAT ACTUATED) l

Fils: ACCSEQ. REP Length f80674-bytes

.Crcatzd: Mon Mar 02 10:47:32'1992

73. 2.360E-009. 0.06% 1 TE4s GTR 3.000E+000- GENERAL TRANS!ENT IN!TIAT!NG EVENT RXT 2.620E 006 FAILURE OF REACTOR TRIP PL

_ 4.890E 001 POWER LEVEL LESS THAN 60 PERCENT MF 3.460E-001. FRACTION OF TRANSIENT 5 MAIN FEED AVAIL UNTIL TURBINE TRIP AM 1.000E+000 ATWS MITIGATING SYSTEM ACTUATION CIRCU!T r

OTT 1.860E-003 OP ACTION - TURB TRIP OR CLOSE MSIVS MPI.

1.000E+000 MIGN PRES $URE INJECTION ASSUMED TO Fall - ATWS 74 2.279E 009 0.06% 1 VL90 ISLOCA 5.830E 008 INTERFACING STSTEMS LOCA INITIA'ING EVENT 015-1.000E+000 OP ACTION

• ISOLATE trR BREACH RTK 4.090E 002 EQUIPMENT To REFILL THE RWST

75. 2.201E-009 0.06% 1 VL9D ISLOCA 5.830E-008 INTERFACING SYSTEMS LOCA INITIATING EVE'NT DIB 1.000E+000 OP ACTION - ISOLATE RHR BREACH ORT 3.800E 002 OP ACTION REFILL THE RWST

76. 2.191E 009 0.05% 63 MI7A MLOCA 1.100E 003 MEDIUM LOCA INITIATING EVENT i

ESF 6.670E 005 ESFAS W/0P ACTION BOTH TRAINS. FAIL SAC 3.160E 002 MANUAL ACTUATION OF SAFEGUARDS EQUIPMENT'(RE SB0+0RE_SBO).

HPI 1.000E+000 1/4 HIGH PRESSURE INJ PMPS TO 2/4 C LEGS NO POWER LPI 1.000E+000 1/2 LOW PRESSURE INJ PMPS 70 2/4 C LEGS 147 AVAIL FC 1.000E+000 1/5 FAN COOLERS NO POWER _

CSI 1.000E+000 1/3 CONTAINMENT SPRAT PUMPS NO POWER AVAIL

77. 2.190E-009 0.05% 198 B145 LOOP 3.200E 002 LOSS OF OFFSITE POWER INITIATING EVENT SUS 1.940E 006 AC POWER WITH LOSP 147,148,149 FAIL.

580 1.000E+000 LDSP, AC UNAVAILABLE, TRANSFER 70 STATION BLACKOUT XCC 4.090E 002 CORE UNCOVERED PRIOR TO POWER REC 0 VERT AT 24 HRS (SEALLOCA;

78. 2.146E-009 0.05% 61

$195 SLOCA 6.800E 003 SMALL LOCA INITIATING EVENT SAC 1.210E 006 SAF ACT 18,19 FAIL-BOTH ESFA$ AVAIL (W/ RESTORATION)

LPI 1.000E+000 1/2 RHR PUMPS ON MlWIFLOW NO POWER FC 9.847E-001 2/5 FAN COOLERS (1 FC15) i RTK 2.910E 001 EQUIPMENT To REFILL THE RWST FOR LOCAs (RTK,ALL+0.25)

79. 2.034E 009 0.05% 198 BI7K DLOOP 1.400E 002 00AL UNIT LOSS OF OFFSITE POWER INITIATING EVENT i

BUS 3.090E 004 AC POWER WITH OLOSP 147,148,149 FAIL

$80 1.000E+000_ LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT RE 7.380E-004 RESTORE EQUIP & SUPPORT SYSTEMS (28. SWITCHES +SW LSW)

80. 2.006E-009 0.05% 196 L19S OLOOP 1.400E-002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT BUS 2.230E 003 AC POWER WITH DLOSP 148,149 FAIL CCW 5.440E-003 COMPONENT COOLING WATER W/DLOSP-148&149 FAIL AFW 1.450E-002 1/3 AUX FEE 0 PMPS TO 4/4 SG NO POWER FC 9.847E-001 2/5 FAN COOLERS (1-FC15)

HPR 1.000E+000 1/4 HIGH PRESSURE REclRC 70 2/4 C LEGS NO POWER RTK 1.000E+000 EQUIPMENT TO REFILL THE RWST (POWER UNAVAILABLE)

81. 1.982E 009 0.05% 1 ML9F-MLOCA 1.100E-003 MEDIUM LOCA INITIATING EVENT LPI 1.650E-004.1/2 LOW PRESSURE INJ PMPS TO 2/4 C LEGS ALL POWER (COND)

RTK 2.910E 001 EQUIPMENT 70 REFILL THE RWST FOR LOCAs (RTK_ALL+0.25)

Cl 3.930E 002 - CGaTAINMENT ISOLATION (ESTAS SUCCESSi SPRAT ACTUATED)

82. 1.971E 009 0.05% 27 RL9T SGTR 9.020E 003 STEAM GENERATOR TUBE RUPTURE INITIATING EVENT Bus 2.860E 004 AC POWER WITN OFFSITE 147 FAILS O!R 8.140E 004 OP ACTION

• MINIMIZE ECCS FLOW l

RTK 1.000E+000 EQUIPMENT TO REFILL THE RWST (POWER UNAVAILABLE)

83. 1.898E-009 0.05% 198 BL9$

OLOOP 1.400E 002 OUAL UNIT LOSS OF 0FFSITE POWER INITIATING EVENT BUS 3.090E 004 AC POWER WITH DLOSP 147,148,149 FAIL SB0 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER 70 STATION BLACKOUT HPR 7.200E 004 1/2 CCPs RECIRC 70 2/4 C LEGS ALL POWER AVAILABLE (COND)

RTK 1.000E+000 EQUIPMENT TO REFILL THE RWST (POWER UNAVAILABLE) 84 1.889E 009 0.05% 198 BL95 DLOOP 1.400E-002 DUAL UNIT.LOS$ OF OFFSITE POWER INITIATlWG EVENT BUS 3.090E-004 AC POWER WITH DLOSP 147,148,149 FAIL i

SBD 1.000E+000 LOST, AC UNAVAILABLE, TRANSFER TO STAfl0N BLACKOUT ORC 7.160E 004 OP ACTION - ESTAB NIGH PRESSURE ECC REC 1RC RTK 1.000E+000 EQUIPMENT TO REFILL THE RWST (POWER UNAVAILABLE)'

85. 1.824E 009 0.05% 88 SL9K SLOCA 6.800E 003 SMALL LOCA INITIATING EVENT l'CB 2.870E 007 OC POWER W/0S 011 1,112 FAIL-147&149 AVAIL LPI 1.000E+000 1/2 RHR PUMPS ON MINIFLOW NO POWER FC 1.000E+000 1/5 FAN COOLERS NO POWER CSI 1.000E+000 1/3 CONTAINMENT SPRAT PtMPS WQ POWER AVAIL RTK 1.000E+000 EQUIPMENT TO REFILL THE RWST (POWER UNAVAILABLE)

86. 1.816E 009 0.05% 1 SL9S SLOCA 6.800E 003 SMALL LOCA INITIATING EVENT ONC 2.160E-003' OP ACTION - ESTAB NORMAL CHARGING (DNC2)

+

Filo: ACCSEQ. REP

' Length: 80674 bytes Created:. Mon Mar 02 10:47:32 1992 LPR 4.480E C% 1/2 LOW PRESSURE RECIRC 70 2/4 C LEGS ALL POWER (COND)

RTK 2.910E 001 EQUIPMENT 70 REFILL THE RVST FOR LOCAs (RTK_ALL+0.25)

87. 1.815E-009 0.03% 63 AE7K LLOCA 3.000E 004 LARGE LOCA INITIATING EVENT ESF 2.040E-004 ESFAS NO OPER ACTION-BOTH TRAINS FAIL SAC 1.000E+000 MANUAL ACTUATION OF EQUIPMENT NOT MODELED FOR LARGL.DCA (PI 1.000E+000 1/2 LOW PRESSURE INJ PMPS TO 2/3 C LEGS No PCWER NPI 1.000E+000 1/4 HIGH PRESSURE INJ PMPS TO 2/3 C LEGS M POWER FC 3.090E 002 1/5 FAN COOLERS ALL POWER WITH RESTORAT!G_.FC11+0RE_SBC)

CSI 1.000E+000 1/3 CONTAINMENT SPRAT PUMPS NO POWER AVAIL

88. 1.760E 009 0.04% 97

$195 SLOCA 6.800E 003 SMALL LOCA INITIATING EVENT DC8 2.870E-UOT DC POWER W/OS 111,112 FAIL 148&149 AVAIL LPI 1.000E+000 1/2 RHR PUMPS ON MlWIFLOW NO POWER FC 9.847E 001 2/5 FAN COOLERS (1 FC15)

RTK 1.000E+000 EQUIPMENT TO REFILL THE RWST (DOWER UNAVAILABLE) 41 9. 1.741E-009 0.04% 200 814$

DLOOP 1.400E-002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT DCB 1.960E-007 9C POWER WITH LOSP 011-1,111,112 FAIL

$80 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT OSI 1.000E+000 OP ACTION - INITIATE SAFETY INJECTION (ESFAS HOW FAILED)

90. 1.7312-009 0.04% 1 SL95 SLOCA 6.800E 003 SMALL LOCA INITIATING EVENT ONC 2.160E-003 OP ACTION - ESTAB NORMAL CHARGING (ONC2)

ORC 4.270E 004 OP ACTION - ESTAB LOW PRESSURE ECC RECIRC RTK 2.910E 001 EQUIPMENT To eEFILL THE RWST FOR LOCAs (RTK_ALL+0.25)

91. 1.643E-009 0.04% 198 BI7K LOOP 3.200E-002 LOSS OF OFFSITE POWER INITIATING EVENT BUS 1.940E-006 AC PCWER WITH LOSP 147,148,149 FAIL

$80 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT ORE 3.090E-002 OP ACTION - RESTORE EQUIP & SUPPORT STSTEMS

92. 1.578E 009 0.04% 1 SL95 SLOCA 6.800E 003 SMALL LOCA INITIATING EVENT CDS 1.320E 004 OP ACTION - SG DEPRES FOR PRIM C9OLING (0051a)

HPR 6.370E 003 1/2 SIPS RECIRC 70 2/4 C LEGS ALL POWER (COND)

RTK 2.910E-001 EQUIPMENT TO REFILL THE RWST FOR LOCAs (RTK_ALL+0.25)

93. 1.478E-009 0.04% 12 LL95 DLOOP 1.400E 002 DUAL UWlf LOSS OF 0FFSITE POWER INITIATING EVENT SUS 4.730E-002 AC POWER WITH DLOSP 149 FAILS AFW 1.320E-004 1/3 AUX FEED PMPS TO 4/4 SG OR 1/4 SG W/0A 148 AVAIL HPR 1.840E 002 1/4 HIGH PRESSURE RECIRC TO 2/4 C LEGS 147 & 148 AVAIL RTK 1.000E+000 EQUIPMENT TO REFILL THE RWST (POWER UNAVAILABLE)

94. 1.474E-009 0.04% 22 LL95 DLOOP 1.400E 002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT SUS 4.790E-002-AC POWER WITH DLOSP 148 FAILS AFW 1.300E 004 1/3 AUX FEED PMPS TO 4/4 SG OR 1/4 SG W/0A 149 AVAIL HPR 1.840E 002 1/4 HIGH PRESSURE RECIRC TO 2/4 C LEGS 147 & 149 AVAIL RTC 1.000E+000 EQUIPMENT TO REFILL THE RWST (POWER UNAVAILABLE)

95. 1.438E-009 0.04% 198 B17K DLOOP 1.400E 002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT BUS 3.090E 004 AC POWER WITH DLOSP 147,148,149 FAIL SWS 1.440E-001 SERVICE WATER W/DLCSP-WO POWER

$B0 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER 10 STATION BLACKOUT XFR 2.470E-003 POWER RECOV FAILURE PR08 AT 24 HR$ (TD & DS)

96. 1.432E-009 0.04% 198 9145 DLOOP 1.400E-002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT BUS 3.090E 004 AC POWER WITH DLOSP 147,148,149 Fall SVS 1.440E-001 SERVICE WATER W/DLOSP-NO POWER

$B0 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT CCP 2.660E 003 1/2 CCPs INJECTING TO 2/4 C LEGS ALL POWER

~ 97. 1.414E-009 0.04% 1 Ll4S LOOP 3.200E-002 LOSS OF OFFSITE POWER INITIATING EVENT AFW 4.770E-005 1/3 AUX FEED PMPS TO 4/4 SG OR 1/4 SG W/CA 148 & 149 AVAIL OSI 9.660E-004 OP ACTION INITIATE SAFETT INJECTION

98. 1.333E-009 0.03% 198 B14$

DLO3P 1.400E-002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT BUS 3.090E-004 AC POWER WITH DLOSP 147,148,149 FAIL

$80 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER 70 STAfl0N BLAC!0UT ORS 1.100E-002 OP ACTION - RAPID SG DEPRES FOR CB INJ (ORS 2)

XCC 4.200E 002 CORE UNCOVEPED PRIOR TO POWER RECOVERT AT 16 HR$ (SEALLO

99. 1.325E 009 0.03% 198 B17K DLOOP 1.400E-002 DUAL UNIT LOSS OF OFFSITE POWER INITIATING EVENT BUS 3.090E 004 AC POWER WITH DLOSP 147,148,149 FAIL 580 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT AFT 1.540E-002 1/1 AUX FEED TDP TO 4/4 SGS ORE 3.090E-002 OP ACTION

• RESTOR 2 EQUIP & SUPPORT STSTEMS 100. 1.269E 009 0.03% 1 AE9s LLOCA 3.000E-004 LARGE LOCA INIT!ATING EVENT i

ESF 8.610E-003 ESFAS NO OPER ACTION-ONE TRAIN FAILS LPR 5.150E-004 1/2 LOW PRESSURE RECIRC 701/3 C LEGS ALL POWER (COND)

Filo: ACCSEQ. REP

. Length: 80674' bytes Cranted: Mon Mar 02 10:47:32 1992 ORT 1.000E+000 RWST REFILL NOT POSSIBLE FOR LARGE LOCA WITH CURRENT EDPs l

101. 1.269E-009 0.03% 1 AE9s LLOCA 3.000E-004 LARGE LOCA INITIATING EVENT ESF 8.610E-003 ESFAS Wo OPER ACTION ONE TRAIN FAILS LPR 5.15DE 004 1/2 LOW PRESSURE RECIRC TO 1/3 C LECS ALL POWER (CONO) t ORT 1.000E+000 RWST REFILL NOT POSSIBLE FOR LARGE LOCA WITH CURRENT E0Ps 102. 1.206E-009 0.03% 198 B145 DLOOP 1.400E-002 DUAL UNIT Lost OF 0FFSITE POWER INITIATING EVENT BUS 3.090E 004 AC POWER WITH DLOSP 147,148,149 Fall

$50 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER 70 STATION BLACKOUT AFT 1.540E 002 1/1 AUX FEED TDP TO 4/4 SGS XCC 2.830E 002 CORE UNCOVERED PRIOR TO POWER RECOVERY AT 2 HRS (SEALLOCA; 103, 1.205E 009 0.03% 198 BITK DLOOP 1.400E 002 DUAL UNIT Loss CF OFFSITE POWER INITIATING EVENT SUS 3.090E-004 AC POWER WITH DLOSP 147,148,149 FAIL CCW 1.410E-001 COMPONENT COOLING WATER W/DLOSP NO POWER 580 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT l

XHR 2.470E 003 POWER RECOV FAILURE PROS AT 24 NAS (TD & DS).

i 104. 1.200E-009 0.03% 198 B145 DLOOP 1.400E-002 DUAL UNIT LDSS OF 0FFSITE POWER INITIATING EVENT CUS 3.090E-004 AC POWER WITH DLOSP 147,148,149 FAIL CCW 1.410E 001 CCMPONENT COOLING WATER W/DLOSP-No POWER -

550 1.000E+000 LOSP, AC UNAVAILABLE, TRANSFER TO STAT 10N BLACKOUT CCP 2.660E-003 1/2 CCPs INJECTING 70 2/4 C LEGS ALL POWER i

105. 1.199E 009 0.03% 1 RL9T SGTR 9.020E-003 STEAM GENERATOR TUBE RUPTURE INITIATING EVENT ESF 3.070E 003 ESFAS W/0P ACTION-ONE TRAIN FAILS 005 1.150E 003 OP ACTION - SG DEPRES FOR PRIM COOLING (CES2)-

ORT 3.800E-002 OP ACTION - REFILL THE RWST 106. 1.199E 009 0.0L% 1 RL9T SGTR 9.020E 003 STEAM GENERATOR TUBE kUPTURE INITIATING EVENT ESF 3.070E 003 ESFAS W/0P ACTION-ONE TRAIN FAILS 005 1.150E-003 OP ACTION - SG thEPRES FOR PRIM COOLING (0052)

ORT 3.800E-002 OP ACTION - REFILL THE RWST 107. 1.190E-009 0.03% 104 TITF GTF 3.000E*000 GENERAL TRANSIENT INITIATING EVENT DCd 6.980E-007 DC POWER W/OS 011-1,111,112 FAIL ALL POWER AFW 1.430E 002 1/3 AUX FEED PMPS TO 4/4 SG NO POWER CB 1.000E+000 1/4 COND BOOSTER PMPS TO 1/4 SGS - LOSS OF 011 1 OR LOSP OSI 1.000E+000 OP ACTION - INITIATE SAFETY INJECTION (ESFAS HOW FAILED)

MPI 1.000E+000 1/4 HIGN PRESSURE INJ PMPS To 2/4 C LEGS NO POWER FC 1.000E+000 1/5 FAN Co0LERS No POWER CSI 1.000E+000 1/3 CONTA!NMNT SPRAY PUMPS NO POWER AVAIL '

LPI 1.000E+000 1/2 LOW PRESSURE INJ PMPS TO 2/4 C LEGS NO POWER l

CI 4.000E 002 CONTAINMENT ISOLATION (ESFAS FAILED, SPRAY ACTUATED)

R I

108. 1.155E+009 0.03% 61 M19s MLOCA 1.100E 003 MEDIUM LOCA INITIATING EVENT SAC 1.210E 006 SAF ACT 18,19 FAIL BOTH ESFAS AVAIL (W/ RESTORATION)

LPI 1.000E+000 1/2 LCW PRESSURE INJ PMPS 70 2/4 C LEGS 147 AVAIL FC 9.847E-001 2/5 FAN COOLERS (1 FC15) i RTK 1.000E+000 EQUIPMENT To REFILL THE RWST (P9WER UNAVAILABLE) i 109. 1.084E 009 0.03% 21 AE95 LLOCA 3.000E 04 LARGE LOCA INITIATING EVENT SAC 8.830E 0% SAF ACT 18 FAILS-ONE ESFAS AVAIL LPI 4.340F " 1/2 LOW PRESSURE INJ PMPS TO 2/3 C LEGS 147 & 149 AVAIL:

Def 1.f*'

• WST REFILL NOT POSSIBLE FOR LARGE LOCA VITH CURRENT E0Ps 110. 1.083E-009 0.03% 10 AE95 (AA 3 ^ ?( ':Ct LARGE LOCA INITIATlWG EVENT j

m 8.

?W SAF ACT 19 FAILS DNE ESFAS AVAIL -

LP.

4..

's 1/2 LOW PRESSURE INJ PMPS TO 2/3 C LEGS 147 & 148 AVAIL ORT 1.0t. e000 RWST REFILL NOT POS$1BLE FOR LARGE LOCA WITH CURRENT E0Ps

.l s.................................................

WESTINGHOUSE CONFIGURATION CONTROL Westinghouse Proprietary Information Code: GT D05 T4' Verified: No Version: 1.00 J

Configuration: February 27, 1992 Execution: March 2, 1992 3 10:47:32.86 l 1

Control Nm ber: 5741995699163 i

A record of this configuration exists in the

.l i

Westinghouse Engineering Technology Configuration Control Department.

(C) Copyright 1991 1992 WESTINGHOUSE ELECTRIC CORP.

l

~

Unptblished work.

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e A rrAcHEvr 2

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Page 1 Septernber 10, 1993 ZION STATION Basic Event Risk Reduction Description eensnents System Worth ORT _ALL 1.23 OP ACTION - REFILL THE RWST N/A N/A ISICV8957A--DZZ 1.11 CHECK VALVE 1518957A RANDOMLY FAILS TO OPEN Cold leg injection chk. vtv.

RH RtKFACTOR 1.09 FACTOR USED IN RTK_ LOC HAND CALC N/A N/A 1AFPTFWOO4--ML4 1.09 TD PUMP 1FWOO4 UNAVAILABLE DUE TO MAINTENANCE Turbine-driven AFW AF 1DGDG1A------XG4 1.07 DIESEL GENERATOR 1A FAILS TO RUN DG 1DGDG18------XG2 1.07 DIESEL GENERATOR 18 FAILS TO RUN DG XCC,S24 1.06 CORE UNCOVERED PRIOR TO POWER RECOVERT AT 24 HRS (SEALLOCA)

N/A N/A CRE 580 1.04 OP ACTION - RESTORE EQUIP & SUPPORT SYSTEMS N/A N/A

-1DGDG1A--- --MG4 1.04 DIESEL GENERATOR 1A UNAVAILABLE DUE TO MAINTENANCE DG 1AFAVM50057--DL4 1.04 AIR-OP FLOW CNTRL 1FCV-MS57 FAILS TO OPEN DUE To LOCAL FLT Steam to TDAFW Pp.

AF 1D GDG18----MG2 1.04 DIESEL GENERATOR 1B UNAVAILABLE DUE TO MAINTENANCE DG 1DGDG1A - ---AG4 1.03 DG 1A FAILS TO START 04 DEMAND DG 1DGDG18- ---AG2 1.03 DG 1B FAILS TO START ON DEMAND DG 1ACC84718191-DCC 1.03 BREAKERS 1471, 1481,8 1491 Fall TO OPEN DUE TO COMMON CAUSE Feed from service bus AP1 1ACCB4738393 KCC 1.03 C8s 1473,1483, & 1493 FAIL TO CLOSE DUE TO COMMON CAUSE D/G output bkr.

AP1 1RHLS8700ASTMFZZ 1.02 STEM-MOUNTED LIMIT SWITCH ON 1RH8700A FAILS DURING OPERATION Interlock RM 1RHLS870095TMFZZ 1.02 STEM-MOUNTED LIMIT SWITCH ON 1 M87008 FAILS DURING OPERATION Interlock RH 1DGDGo-------XG6 1.02 DIESEL GENERATOR 0 FAILS TO RUN DG 1RHLS8700AB -FCC 1.02 STEM MOUNTED LIMIT SWITCHES ON 1RH8700A, 8 FAIL DUE TO CC Interlock RM 1CSPM001A----XJ5 1.01 CS PUMP CS001-1A FAILS TO RUN RANDOMLY Not related to core melt CS 1RMCV8958----DZZ 1.01 CHECK VALVE 1518958 RANDOMLY FAILS TO OPEN RHR suction from RWST RM 10 GC81483----KC7 1.01 DG CIRC. BREAKER 1483 FAILS TO CLOSE ON DEMAND D/G cutput thr.

AP1 1ACC81481---DCT 1.01 MAIN FD. BREAKER 1481 FAILS TO OPEN ON DEMAND Feed frcra service bus AP) 1DGCB1493---KC5 1.01 DG CIRC. BREAKER 1493 FAILS TO CLOSE ON DEMAND D/G output bkr.

AP1 1 ACC81491-- DC5 1.01 MAIN FD. BREAKER 1491 FAILS TO OPEN ON DEMAND Feed from service bus AP1 1SWPM003---~ MR1 1.01 SW PUMP 1C (1SWOO3) UNAVAILABLE DUE TO MAINTENANCE SW 15tMV8811A--DZZ 1.01 MOTOR OPERATED VALVE 1 SIB 811A FAILS TO OPEN Recirc. sus suction RN 1RNMV8700A --KZZ 1.01 MOTOR OPERATED VALVE 1RH8700A FAILS To CLOSE Suction from RWST, hot leg RM 1 AFPT FWOO4-- At4 1.01 TD PUMP 1FWOO4 MECHANICAL FAILURE TO START Turbine-driven AFW AF 1RHMV87008--KZZ 1.01 MOTOR OPERATED VALVE 1RH87008 FAILS TO CLOSE IN RHR SYS SEG Suction from RWST, hot leg RM 1SIMV8811B---DZZ 1.01 MOTOR OPERATED VALVE 18188118 RANDOMLY FAILS TO OPEN Recirc. su9 suction RH IYCCV9032----DZZ i.01 CHECK VALVE 1519032 RANDOMLY FAILS TO OPEN Chg. pp. cold leg injection

$1 TVCCV8546----DZZ 1.01 CHECK VALVE IVC 8546 RANDOtLY FAILS TO OPEN Chg. pp. suction f rom RWST '

SI 1RHMV610611--DCC 1.01 RHR MINIFLOW VALVES 1RHFCV610 & 1RMFCV611 FAIL DUE To CC RN 10GDGO------MG6 1.01

-DIESEL GENERATOR O UNAVAILABLE DUE TO MAINTENANCE DG 1DGDGO----- AG6 1.01 DG O FAILS TO START ON DEMAND DG 1AFPTFW004 -XL4 1.01 TD PUMP 1FWOO4 MECMANICAL FAILURE,0 RUN Turbine-driven AFW AF 25 WPM 003 ---MR1 1.01 SW PUMP 2C (2SWOO3) UNAVAILABLE DUE TO MAINTENANCE SW 1VCMVS18801A-KZZ.

1.01 MOTOR OPERATED VALVE ISI8803A FAILS TO CLOSE Chg. pp. co(d leg injection SI 1VCMVLCV1128-DZZ 1.01 MoiOR OPERATED VALVE VC LCV1128 FAILS TO OPEN RWST refitt VC 1YCMVVC8106--DZZ 1.01 MOTOR OPERATED VALVE VC8106 FAILS TO OPEN RWST refitt, normat charging-VC

.1VCMVLCV112C-DZZ 1.01 -

MOTOR OPERATED VALVE VC LCV112C FAILS TO OPEN RWST refill VC 1VCMVVC8105--DZZ 1.01-MOTOR OPERATED VALVE VC8105 FAILS TO OPEN RWST refill, normet charging VC

- ~

Page 2 Septenber 10,199!

1VCMVLCV112E-KZZ 1.01 MOV VC LCV112E RANDOMLY FAILS TO CLOSE RWST refitt, normat charging SI 1VCMVLCV112D KZZ 1.01 MOV VC LCV112D RANDOMLY FAILS TO CLOSE RWST refitt, normal charging SI 1VCMVS!8801B KZZ 1.01 MOTOR OPERATED VALVE 15188038 FAILS TO CLOSE RWST refitt, normat charging SI IVCCV8440---DZZ 1.01 VCT DUTLET CHECK VALVE FTO VC-8440 RWST refitt VC 1VCxv8428 ~ ~ DZZ 1.01 MANUAL VALVE FTO VC-8428 Bldr. to VCT outlet (mistake)

VC 1VCxV8416

--DZZ 1.01 MANUAL VALVE FTO VC-8416 VCT intet (mistake)

VC 1VCxv8432-- DZZ 1.01 MANUAL VALVE FTO VC-8432 RWST refill VC 1VCCV8443--- DZZ 1.01 CHECK VALVE FTO VC-8443 RWST refill VC 1VCxV8434----DZZ 1.01 MANUAL VALVE FTO VC-8434 RWST refitt VC 1VCxV8281 ~ ~ KZZ 1.01 MANUAL VALVE FTC VC-8281 RWST refill VC IVCCV8433 ~ -DZZ 1.01 CHECK VALVE FTO VC-8433 RWST refitt VC 1RHmv8700AB -KCC 1.01 MOTOR OPERATED VALVE 1RH8700A & B FAIL TO CLOSE, C CAUSE Suction from RWST, hot leg RH 1S1MV8811AB -DCC 1.01 MOTOR OPERATED VALVE 1s!8811A & B FAIL TO OPEN COMMON CAUSE Recirc. strnp suction RH 10GDG01A1B"-FCC 1.01 DGs 0, 1A, & 18 FAIL TO RUN DUE TO COMMON CAUSE DG 1ESRE18R219R2FCC 1.01 DIV 18 RELAY R2 Aho DIV 19 RELAT R2 Fall DUE TO COMMON CAUSE ESFAS actuation of RHR pps.

RH 2DGDG2A~ --~ XG5 1.01 DIESEL GENERATOR 2A FAILS TO RUN DG 1VCAVFCV0110ADZZ 1.00 AIR OPERATED VALVE FTO VC-FCV-0110A RWST refitt VC 1RHPM001-~ - AHS 1.00 RHR PUMP 1A RANDOMLY FAILS TO START RM 1VCPM006---~AK4 1.00 CHARGING PUMP 1A FAILS TO START VC 1RMPM002----AH7 1.00 RHR PUMP 18 RANDOMLY FAILS TO START RH 1DGDG1A18--~ FCC 1.00 DGs 14 AND 18 Fall TO RUN DUE TO COMMON CAUSE DG 2DGDG2B" " ~ XG3 1.00 DIESEL GENERATOR 2B FAILS TO RUN DG 1RHMVFCV610-DZZ 1.00 RHR MINIFLOW VALVE 1RHFCV610 FAILS TO OPEN RH 1RHMVFCV611*-DZZ 1.00 RHR MINIFLOW VALVE 1RHFCV611 FAILS TO OPEN RH 1ACCN148---~NC7 1.00 DG AUTO START SIGNAL (BUS UV) NOT AVAILABLE AP1 1ACCN1483-- ~ NC7 1.00 AUTO CLOSE SIG-u TO BREAKER 1483 CLOSE CIR-CUlf IS UNAVA AP1 2DGDG2A ~ ~ +-MG5 1.00 DIESEL GENERATOR 2A UNAVAILABLE DUE TO MAINTENANCE DG IVCFLO21-- --PZZ 1.00 FILTER FAILS TO PASS COOLANT IN EMGY BORATION SYS SEGMENT L Boric acid filter VC 1ACCN149~---NC5 1.00 DG AUTO START SIGNAL (BUS UV) NOT AVAILABLE AP1 1ACCN1493---NCS 1.00 AUTO CLOSE SIG-NAL TO BREAKER 1493 CLOSE CIR-CUIT IS UNAVA AP1 1DCCSA2182282UCC 1.00 CB 011A2, 111B2 AND 11282 TRANS-FER OPEN DUE TO A COMMON CA Battery feed to DC bus DC2 1DGDG01A1B" ACC 1.00 DGs 0,1A, & 18 Fall TO START DUE TO COMMON CAUSE DG 1ACCB483493-KCC 1.00 CIRC. BR. 1483 AND 1493 Fall TO CLOSE DUE TO COMMON CAUSE D/G output bkr.

API 1ACCB481491-DCC 1.00 FD. BREAKER 1481 AND 1491 FAIL TO OPEN DUE TO COMMON CAUSE Feed from service bus AP1 1RHPM002-~ --MH5 1.00 RHR PUMP 18 UNAVAILABLE DUE TO MAINTENANCE RN 1RHPM001---~MH5 1.00 RHR PUMP 1A UNAVAILABLE DUE TO MAINTENANCE RH 1DGCB1473--*-KD1 1.00 DG CIRC. BREAKER 1473 FAILS TO CLOSE ON DEMAND D/G output bkr.

AP1 1ACCB1471 ~--001 1.00 MAIN FD. BREAKER 1471 FAILS TO OPEN ON DEMAND Feed from service bus AP1 1SWMV00160017GH3 1.00 DG HEAT EXCHAN-GER ISOL. VALVES NOT RESTORED AF1ER TEST /MAI 2DGDG2A ~----AG5 1.00 DG 2A FAILS TO START ON DEMAND 2DGDG28 -----MG3 1.00 DIESEL GENERATOR 28 UNAVAILABLE DUE TO MAINTENANCE DESSQSSDSEQ28FC6 1.00 SAFE SHUTDOWN SEQUENCER 28 FAILS 1ESSILOLO5GLVFC5 1.00 FAILURE OF ACTUATION SIGNAL LO-LO SG LEVEL 1DGDG1A18-~-ACC 1.UO DGs 1A AND 18 FAIL TO START DUE TO COMMON CAUSE 2DGDG28-----AG3 1.00 DG 28 FAILS TO START ON DEMAND 1ESRE19R2----FC5 1.00 Div 19 RELAY R2 FAILS DURING OPERA 1104 1ESRE18R2----FC7 1.00 DIV 18 RELAY R2 FAILS DURING OPERATION DESSQSSDSEQ29FC6 1.00 SAFE SHUTDOWN SEQUENCER 29 FAILS

Page 3 September 10, 1993 PL ATW 1.00 POWER LEVEL GREATER THAN 60 PERCENT BACTRSAT242--HZZ 1.00 OPERATOR FAILS TO RESTORE DEAD ESF BUS VI A THE SAT 242 TIE 1FPPD0007----AZZ 1.00 DIESCL DRIVEN PUMP FP0007 FAILS TO STAT

• 1$FPM003----*AZZ 1.00 SPENT FUEL PIT PUMP RANDOM FTS 1SF-003 2ACCB2412----KD4 1.00 FD. BRKR. 2412 FROM BUS 241 FAILS TO CLUSE 1SICV8957B---DZZ 1.00 CHECK VALVE 15189578 RANDOMLY FAILS T0 (FEN 1RHPM001002--ACC 1.00 RHR PUMPS 1A & 18 Fall TO START DUE TO COMMON CAUSE 1VCAVFCV0111BDZZ 1.00 MAKE-UP ISOL. VALVE TO VCT FTO (F.C.) FCV-VC-01118 1VCAvFCV0111ADZZ 1.00 AIR OPERATED VALVE FTO VC-FCV-0111A IVCAvFCV0110BDZZ 1.00 MAKE-UP ISOL. VALVE TO VCT FTO (F.C.) FCV-VC-0110B BCCPM004-----MK1 1.00 PUMP OB UNAVAILABLE DUE TO MAINTENANCE 1RHPM001-----MH5 1.00 RHR PUMP 1A FAILS TO RUN 1RHPM002---- xH7 1.00 RNR PUMP 18 FAILS TO RUN IVCPM006*----xK4 1.00 CHARGING PUMP 1A FAILS TO RUN 18 HRS 1DGDG01A-----FCC 1.00 DGs O AND 1A Fall TO RUN DUE TO COMMON CAUSE 1DCBT01111112FCC 1.00 BATTERY 011.111, AND 112 FAtt DUE TO A COMMON CAUSE 1FPPD0007- --xZZ 1.00 DIESEL DRIVEN PUMP FP0007 FAILS To RUM 2ACCB2481----DC8 1.00 MAIN FD. BREAKER 2481 FAILS TO OPEN ON DEMAND 2DGCB2483----KC8 1.00 -

DG CIRC. BREAKER 2483 FAILS TO CLOSE ON DEMAND 1DGDG018-----FCC 1.00 DGS 0 AND 18 FAIL TO RUN DUE TO COMMON CAUSE 1SICV90023---DZZ 1.00 CHECK VALVC 15190028 RANDOMLY FAILS TO OPEN 1SICV90018---DZZ 1.00 CHECK VALVE 15190018 RANDOMLY FAILS TO OPEN ISICV9002A---DZZ 1.00 CHECK VALVE 1519002A RANDOMLY FAILS TO OPEN 1SICV9001A---DZZ 1.00 CHECK VALVE ISI9001A RANDOMLY FAILS TO OPEN 1CCMV94128---DZZ 1.00 CCW VALVE 1CC9412B TO RHR HX 1B FAILS TO OPEN 1CCMV9412A---DZZ 1.00 CCW VALVE 1CC9412A TO RHR HX 1A FAILS TO OPEN 1AFCvFWOO68 -DAS 1.00 FAULT IN SEG. B CHECK VALVE 1FWOO68 FAILS TO OPEN 1AFCVFWOO66 -DAS 1.00 FAULT IN SEG. D CHECK VALVE 1FWOO66 FAILS TO OPEN 1AFCVFWOO67--DA5 1.00 FAULT IN SEG. C CHECK VALVE 1FWOO67 FAILS TO OPEN 1AFCvFWOO69--DAS 1.00 FAULT IN SEG. A CHECK VALVE 1FWOO69 FAILS TO OPEN 1AFCVFWOO31--DL4 1.00 CHECK VALVE 1FWOO31 FAILS TO OPEN 15!CV9002ABC-DCC 1.00 CHECK VALVES 1SI9002A, B, C Fall TO OPEN DUE TO COMMON CAUSE 1ACCN1473----ND1 1.00 AUTO CLOSE SIG-NAL 70 BREAKER 1473 CLOSE CIR-Culi IS UNAVA 1ACCN147-----ND1 1.00 DG AUTO START SIGNAL (BUS UV) NOT AVAILABLE 1SICV9001C---DZZ 1.00 CHECK VALVE 1S!9001C RANDOMLY FAILS TO OPEN ISICv8957AB--DCC 1.00 CHECK VALVES 1SI8957A, 8 Fall TO OPEN DUE TO COMMON CAUSE 1SWPM001-----AR1.

1.00 SW PUMP 1A RANDOMLY FAILS TO START 2ACCB2491----DC6 1.00 MAIN FD. BREAKER 2491 FAILS TO OPEN ON DEMAND 2DGCB2493----KC6 1.00 DG CIRC. BREAKER 2493 FAILS TO CLOSE ON DEMAND 1AFAMSG10----DCC 1.00 SG 1D SAFETY VALVES (5) FAIL TO OPEN DUE TO COMMON CAUSE 1AFAMSG18----DCC 1.00 SG 18 SAFETY VALVES (5) FAIL TO OPEN DUE TO COMMON CAUSE 1AFAMSG1C--- DCC 1.00 SG 1C SAFETY VALVES (5) FAIL TO OPEN DUE To COMMON CAUSE 1AFAMSG1A----DCC 1.00 SG 1A SAFETY VALVES (5) FAIL TO OPEN DUE TO COMMON CAUSE 1ACCB473483--KCC 1.00 CIRC. BR. 1473 AND 1483 Fall TO CLOSE DUE TO COMMON CAUSE 1ACCE471481-DCC 1.00 FD. BREAKER 1671 AND 1481 FAIL TO OPEN DUE TO COMMON CAUSE 1ACCB1421----DD3 1.00 CIRCUti BREAKER 1421 FAILS TO DPEN AUTOMAT-ICALLY 1 ACCB1422- --KD3 1.00 CIRCuti BREAKER 1422 FAILS TO CLOSE Auf 0 MAT-ICALLY 1RMCV9002C---DZZ 1.00 CHECK VALVE 1519002C RANDOMLY FA!LS TO OPEN

.~.

Page 4 Septeser 10, 1993 1 ACC8473493--KCC 1.00 CIRC. BR. 1473 AND 1493 Fall TO CLOSE DUE TO COMMON CAUSE 1ACCB471491--DCC 1.00 FD. BREAKER 1471 AND 1491 Fall TO OPEN DUE TO COMMON CAUSE ISWPM002--+--AR1 1.00' SW PUMP 18 RANDOMLY FAILS TO START 2SIxv8927 --DZZ 1.00 RWST-U2 BLOCK VALVE (N.C.) FTO 251-8927 iSFCV8766---DZZ 1.00 SPENT FUEL PIT FLOW TO RWST CHK VLV FTO SF-8766 ISFXV8774----DZZ -

1.00 SPENT FUEL FLTR BLOCK VLV FTO SF-8774 1SIXV8927---DZZ 1.00 RWST-U1 BLOCK VALVE (N.C.) FTO 151-8927 2SFXV8758---DZZ 1.00 RWST-U2 REFU. WTR PUR. PUMP BLOCK VLV (N.C.) FTo 2SF-87 1SFxv8788----DZZ 1.00 MANUAL ISOLATION VALVE SPENT FUEL PIT FLOW TO RVST FTO SF-87 1SFxv8758---DZZ 1.00 RWST-U1 REFU. WTR PUR. PUMP ELOCK VALVE N.C. FTO 1SF-87 1SFKV8765---KZS 1.00 SPENT FUEL PUMP PIT RETURN BLOCK VALVE FTC 1SF8765 1SIXV8931- --DZZ 1.00 MANUAL BLOCK VLV To RWST FTO SI-8931 25 WPM 002- ---AR1 1.00 SW PUMP 28 RANDOMLY FAILS TO START 1FPP00007---MZZ 1.00 DIESEL DRIVEN PUMP FP0007 MAINTENANCE UNAVAILABILITY 1SICV9002ABCDDCC 1.00 CHECK VALVES 1SI9002A,8,C,0 Fall TO OPEN DUE TO COMMON CAUSE 1SICV9001AstDDCC 1.00 CHECK VALVES iS19001A,8,C,0 Fall TO OPEN DUE TO COMMON CAUSE 1SWPN003-----AR1 1.00-SW PUMP 1C RANDOMLY FAILS TO START 1DGDG01M*- ACC 1.00 DGs O AND 1A Fall To START DUE TO COMMON CAUSE 1CSMV0002---DJS.

1.00 1MarbCS0002 FAILS TO OPEN RANDOMLY 2ACCB481491--DCC 1.00 FD. BREAKER 2481 AND 2491 FAIL TO OPEN DUE TO COMMON CAUSE 151PM004- ---X17-1.00

$1 PUMP 18 FAILS TO RUN 1DGDG018---- ACC 1.00 DGs O AND 18 Fall TO START DUE TO COMMON CAUSE 1AFDPACTION-HZZ 1.00 OPERATOR FAILS TO OPEN AFW THROTTLE VALVES 1ESCN19TR15&60C5 1.00 TEST RELAY TR1/19 CONTACTS 586 SPURIOUSLY OPEN 1ESCN18TR15&60C7 1.00 TEST RELAY TR1/18 CONTACTS S&6 SPURIOUSLY OPEN 1ESCN16A5&B5-0C5 1.00 TEST SWITCH #16 N-T CONTACTS A5&B5 SPURIOUSLY OPEN 1ESCN15A5&B5-0C7 1.00 -

TEST SWITCH #15 N-T CONTACTS A5&B5 SPURIOUSLY OPEN 25 WPM 003----ARI.

1.00

. SW PUMP 2C RANDOMLY FAILS TO START 1SIPM003---- X15 1.00'

<St PUMP 1A FAILS TO RUN-1ESTI17TSI---FD1 1.00 Div 17 MECMANICAL CAM TIMER TSI FAILS DURING OPERATION 1AFPMFWOO6---AL4 1.00 MOTOR-DRIVEN PUMP 1FWOO6 RANDOM FAILURE TO START 1RHCV8730A-DZZ :

1.00 CHECK. VALVE 1RM8730A RANDOMLY FAILS TO OPEN

' 1RNCV87308--DZZ 1.00 CHECK VALVE 1RN87308 RANDOMLY FAILS TO OPEN 1AFPMFWOOS---AL4 1.00 MOTOR-DRIVEN PUMP 1FWOO5 RANDOM FAILURE TO START ISICV9001A8C-DCC 1.00

-CHECK VALVES 1519001A, 8, C FAIL TO OPEN DUE TO COMMON CAUSE BESRE171819-FCC 1.00 DIVS 17, 18 & 19 RELAYS FAIL DUE TO CC -

1ACC814841494UCC 1.00 CB 1484 AND 1494 TRANSFERS OPEN DUE TO A COMMON CAUSE

~

1ACC8383039580CC 1.00

'CS 1383D AND 13958 TRANSFER OPEN DUE TO A COMMON CAUSE 1ATPMFWOO6---ML4-1.00 MDP.1FWOO6 UNAVAILABLE DUE TO MAINTENANCE i

1AFPMFW005 --ML4 1.00 JMDP 1FW005 UNAVAILAstE DUE TO MAINTENANCE-1ACCB1494----UC5 1.00-CIRCUti BREAKER 1494 FROM 4160V ESF SUS 149 TRANSFERS OPEN

.1SICV9001D---DZZ-

.1.00 CHECK VALVE' 1519001D RANDOMLY FAILS TO OPEN ISICV9002C---DZZ, 1.00 CHECK VALVE 1519002C RANDOMLY FAILS TO OPEN 1SICV9002D---DZZ:

1.00.

CHECK VALVE 1519002D RANDCMLY FAILS TO CPEN 1RMCv8730A8--DCC,

_1.00 CHECK VALVES 1RM8730A, 8 Fall DUE TO CopeION CAUSE.

1RMPM001002--XCC 1.00

. RHR PUMPS 1A & 18 Fall TO RUN DUE-TO COMMON CAUSE 1ACC813958 --UC5 1.00 CIRCUIT BREAKER 13958 FROM 480V ESF SUS 139 TRANSFERS OPEN' 1ESRE17R6- -FD1 1.00 DIV 17 RELAY R6 RANDOMLY FAILS DURlWG OPERATION.

Page 5 Septecber 10, 1993 1SFPM003----XZZ 1.00 SPENT FUEL Plf PUMP RANDOM FTR 1SF-0003 2DGDG2A28----XCC 1.00 DGs 2A AND 28 FAIL TO RUN DUE TO COMMON CAUSE 1ESRE1BR6- - -FD1

- 1.00 DIV 18 RELAY R6 RANDUMLY FAILS DURING OPERATION ISIPM003004--XCC 1.00 SI-PUMPS 1A AND 18 FAIL TO RUM DUE TO COMMON CAUSE 1SICV9001AC--DCC 1.00 CHECK VALVES 1S!9001A, C Fall TO OPEN DUE TO COMMON CAUSE 1SICV9002AS--DCC 1.00 CHECK VALVES 1519002A, 8 FAIL TO OPEN DUE TO COMMON CAUSE 151CV9001A8--DCC - 1.00' CHECK VALVES 1SI9001A, 8 FAIL TO OPEN DUE TO COMMON CAUSE 2ESRE28R6--- FD1' 1.00 DIV 28 RELAY R6 RANDOMLY FAILS DURING OPERATION 2ACCB483493--KCC-1.00 CIRC. 8R.' 2483 AND 2A93 FAIL TO CLOSE DUE TO COMMON CAUSE

- 1CSMv0003---T2Z 1.00 COMP. FAULT IN SEGMENT D: 1MOV-CS0003 & TRAIN A TEST UNAVAI 1 ACCB1373A--UD1 1.00 CIRCUlf BREAKER 1373A FROM 480V ESF BUS 137 TRANSFERS OPEN 1ACCS1474 ~~UD1 1.00 CIRCUIT BREAKER 1474 FROM 4160V ESF BUS 147 TRANSFERS OPEN ISICV9002ACD-DCC 1.00-CHECK VALVES 1SI9002A, C, D. FAIL TO OPEN DUE TO COMMON CAUSE 1SICV90028CD-DCC 1.00 CHECK VALVES 15I90028/ C, D FAIL TO OPEN DUE TO COMMON CAUSE 1SICV9002ABD-DCC 1.00 CHECK VALVES.1SI9002A, 8, D Fall TO OPEN DUE TO COMMON CAUSE ISICV9001A80-DCC

. 1.00 CHECK VALVES 1519001A, 8, D FAIL TO OPEN DUE TO COMMON CAUSE iSICV90018CD DCC ~

1.00 CHECK VALVES 15190018, C, n FAIL TO OPEN DUE TO CODMON CAUSE 1SICV9001ACD-DCC 1.00 CHECK VALVES 1S19001A, C, D Fall TO OPEN DUE TO COMMON CAUSE 1DCCB1A211182UCC 1.00 -

CB 011A2 AND 11182 TRANSFER OPEN DUE TO A COMMON CAUSE 1ACC813748---UD1 1.00 CIRCulf BREAKER 13748 FROM 480V ESF BUS '37 TRANSFERS OPEN 1CSPM001A---AJS -

1.00-CS PUMP C5001-1A FAILS TO START RANDOMLY q.W 1DCCB18211282UCC 1.00.

CB 11182 AND 11282 TRANSFER OPEN DUE TO A COMMON CAUSE MF ATW 1.00 FRACTION OF TRANSIENTS MAIN FEED UNAVAIL UNTIL TURBINE TRIP 2DGDG2A28---ACC

- 1.00 DGs 2A AND 28 FAIL TO START DUE TO COMMON CAUSE 1CSPM001A----MJ5 1.00' SEGMENT B (TRAIN A) UNAVAILA8LE DUE TO MAINTENANCE 1SIMv88048 --DZZ 1.00 MOTOR OPERATED VALVE 15188048 RANDOMLY FAILS TO OPEN IS!Mv8804A---DZZ-1.00 MOTOR OPERATED VALVE 1518804A FAILS To OPEN IN SEGMENT NR OPWPM002----XZZ 1.00.

PRIMARY WATER MAKE-UP PUMP 08 RANDOM FTR OPWOO2 1VCMV6801A8--DCC 1.00 MOTOR OPERATED VALVE iSI8801A & 8 FAIL TO OPEN COMMON CAUSE 1VCMvLCV112DEDCC 1.00 MOV VC LCV112D & E FAIL TO OPEN DUE TO COMMON CAUSE.

OPWPM002----MZZ 1.00 PRIMARY WATER PUMP 08 UNAVAILABLE DUE TO MAINTENANCE 1ACTR139-- -+0c5

1. 00.-

'4160-480V TRANS= FORMER 139 FAILS'-

1SICV90028C--DCC 1.00 CHECK VALVES 15190028, C FAIL 'TO OPEN DLE TO Comm0N CAUSE 1SICV9002AC-DCC' 1.00 CHECK VALVES _1SI9002A, C FAIL TO OPEN DUE TO COMMON CAUSE 1SICV90018C--DCC 1.00 CHECK VALVES 1$190018, C Fall TO OPEN DUE TO COMMON CAUSE 1ESRE19R6---FD1 1.00 DIV 19 RELAY R6 RANDOMLY FAILS DURING OPERATION 1 ACTR137---0D1

' 1.00 4160-480V TRANS-FORMER 137 FAILS OEC,LSC-1.00 OP ACTION - FIREWATER TO CCP OIL COOLER 1VCPM023----XZ7 1.00 8 A TRANSFER PUMP 1A RANDOMLY FAILS TO RUN 2ESRE29R6---FD1; 1.00 DIV 29 RELAY R6' RANDOMLY FAILS DURING OPERATION 1ESRE17R3---FD1 -

1.00 JIV 17 RELAY R3 FAILS DURING OPERATION 2ACC82421----DD4 1.00-

' CIRCUIT BREAKER 2421 FAILS TO 0*EN AUTOMAT-ICALLY 2ACCB2422----KD4 1.00 circuli BREAKER 2422 FAILS TO CLOSE AUTOMAT-ICALLY BCCPM007---- AK1 1.00 PUMP OE RANDOMLY FAILS TO START 1FPXVH24-----DZZ 1.00

--RANDOM FAILURE OF FIRE PLUG VALVE AT COLUMN H-24 TO OPEN.

1DCFU20 AMP-- 8E3 1.00' 20 AMP FUSE FROM DC DISTRIBUTION PANEL 1C837 FAILS 1DCFU1CB3720ABE3 1.00-20A FUSE FROM DC DISTRIB. PANEL 1C837 FAILS OPEN 1DCFU1CB3820ABD7

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Page 6 September 10, 1993 CPWPM001 ----xZZ 1.00 PRIMARY WATER MAKE-UP PUMP OA RANDOM F1R OPW-001 1CSxV0037----GJ5 1.00 COMPONENT FAULT IN SEGMENT C: VALVE 1CS0037 LEFT OPEN ISWPM002----'XR1 1.00 SW PUMP 18 RANDOMLY FAILS TO CONTINUE TO RUN ISFFLSTRAINERPZZ 1.00 SPENT FUEL PIT FilMP SUCTION PIPING STRAINER (AT TANK) PLUGS 1SFFLOO6 - --PZZ 1.00 SPENT FUEL PIT FILTER PLUGS SF-006 OESR E 17R T--" FD1 1.00 DIV 17 RELAY R7 RANDOMLY FAILS DURING OPERATION 1ACCB1484----UC7 1.00 CIRCUIT BREAKER 1&84 FROM 4160V ESF BUS 148 TRANSFERS OPEN 2CCPM003-----AK1 1.00 PUMP OA RANDOMLY FAILS TO START 2DGDG2A28---xCC 1.00 DGs 2A AND 28 FAIL TO RUN DUE TO COMMON CAUSE 1SWPM001 - --XR1 1.00 SW PUMP 1A RAMDOMLY FAILS TO CONTINUE TO RUN 1FPxVH24 - -MZZ 1.00 MAINTENANCE UNAVAILABILITY OF FIRE PLUG VALVE H-24 1ESRE18A7-- FC7 1.00 DIV 18 RELAY R7 FAILS DURING OPERATION 1ESRE19R T--FC5 1.00 DIV 19 RELAY R7 FAILS DURING OPERATION 1SICV8900ABCDDCC 1.00 CHECK VALVES IS!8900A,B,C,D FAIL TO OPEN DUE TO COMMON CAUSE 1ACCB13830- -UC7 1.00 CIRCUIT BREAKER 1383D FROM 480V ESF BUS 138 TRANSFERS OPEN 25 WPM 002-----xR1 1.00 SW PUMP 28 RANDOMLY FAILS TO CONTINUE TO RUN 1VCPM024-- - XZZ 1.00 B A TRANSFER PUMP 18 RANDOMLY FAILS TO RUN 1SFCv8793- - DZZ 1.00 SPENT FUEL PIT PUMP DISCHARGE CHECK VALVE FTO SF-8793 OESRE29RS - -FC6 1.00 Div 29 RELAY R8 RANDOMLY FAILS DURING OPERATION 1AFPMFWOO6---xt4 1.00 MOTOR-DRIVEN P'JMP 1FWOO6 RANDOM FAILURE TO RUN 1ESCN1851x3&4KC7 1.00 DIV 18 RELAY S!x CONTACTS 3&& Fall TO CLOSE ON DEMAND 1ESCN1951x3&4KC5 1.00 DIV 19 RELAY Six CONTACTS 3&4 FAIL TO CLOSE ON DEMAND 1ESCN19R2182-KC5 1.00 DIV 19 RELAY R2 CONTACTS 182 FAIL TO CLOSE ON DEMAND 1AFPMFWOOS---xL4 1.00 MOTOR-DRIVEN PUMP 1FWOO5 RANDOM FA! LURE TO RUN 1ESCN18R2112-KC7 1.00 DIV 18 RELAY R2 CONTACTS 112 FAIL TO CLOSE ON DEMAND AFWFACTOR 1.00 AFW 13 HOUR RUN FACTOR 1YCPM024-----MZZ 1.00 B A TRANSFER PUMP 18 UNAVAIL-ABLE DUE TO MAINTENANCE TVCCV8429--"DZZ 1.00 CHECK VALVE FTO VC-8429 2CC.H004-----AK1 1.00 PUMP 08 RANDOMLY FAILS TO START 1VCPM024-----AZZ 1.00 B A TRANSFER PUMP FAILS TO START (HIGN SPEED) 1ACCBUATSAT--ND3 1.00 AUTO BUS TRANSFER SIGNAL 15 UNAVAILABLE BUS OSP 1 1.00 AC POWER WITH OFFSITE 147,148,149 FAIL iSWILOOS - --PRI 1.00 SW STRAINER 18 RANDOMLY FAILS (PLUGS)

ISWFLOO4-----PRI 1.00 SW STRAINER 1A RANDOMLY FAILS (PLUGS) 1RCAVPCV455C DCC 1.00 COMMON CAUSE FAILURE OF PORVS PCV-455C AND PCV-456 1SWPM003 - - xR1 1.00 SW PUMP 1C RANDCMLY FAILS To RUN 1MSAVMS21K"-DZZ 1.00 SD VALVE 1PCV-MS21K RANDOM FAILURE TO OPEN DESRE28R8----FC8 1.00 DIV 23 RELAY RS RANDOMLY FAILS DURING CPERATION 1NSAVMS21F---DZZ 1.00 50 VALVE 1PCV-MS21F RANDOM FAILURE TO OPEN 1MSAVMS21B---DZZ 1.00 SD VALVE 1PCV-MS218 RANDOM FAILURE TO OPEN 2CCPM003-----XK1 1.00 PUMP OA RANDOMLY FAILS TO CONTINUE TO RUN BSWPM1A1828 -ACC.

1.00 PUMPS 1A, 1B & 28 FAIL TO START DUE TO CC 1VCMV88018 - DZZ 1.00 MOTOR OPERATED VALVE 1$188018 FAILS TO OPEN 1YCMVLCV112E-DZZ 1.00 MOV VC LCV112E RANDOMLY FAILS TO OPEN IVCMV8801A---DZZ 1.00 MOTOR OPERATED VALVE 1518801A FAILS TO OPEN IVCMVLCV112D-DZZ 1.00 MOV-VC-112D RANDOMLY FAILS TO OPEN 2SWPM003-- ~ xR1 1.00 SW PUMP 2C RANDOMLY FAILS TO RUN 1AFMVFWOO56--DZZ 1.00 MOTOR OPERATED VALVE FW0056 RANDOMLY FAILS TO OPEN

Page 7 Sept ewber 10, 1993 1AFMVFWOO54--DZZ 1.00 MOTOR OPERATED VALVE FW0054 RANDOMLY FAILS TO OPEN 1AFMvFW0052--DZZ 1.00 MOTOR OPERATED VALVE FWOOS2 RANDOMLY FAILS TO OPEN 1AFMVFWOO50-DZZ 1.00 MOTOR OPERATED VALVE FWOO50 RANDOMLY FAILS TO OPEN 1MSGV0003---KZZ 1.00 RANDOM FAILURE To CLOSE GOV. VALVE 3 2ESRE2829R6-FCC 1.00 DIV 28 & 29 RELAYS FAIL DURING OPERATION DUE TO CC 1MSSV0002---KZZ 1.00 RANDOM FAILURE TO CLOSE STOP VALVE 2 1MSSv0001- --KZZ 1.00 RANDOM FAILURE TO CLOSE STOP VALVE 1 1MSSV0004-*-KZZ 1.00 RANDOM FAILURE TO CLOSE STOP VALVE 4 1AFCV69686766DCC 1.00 COMMON CAUSE FAILURE OF CV 1FWOO69 AND 0068 AND 067 AND 066 1MS$v0003----KZZ 1.00 RANDOM FAILURE TO CLOSE STOP VALVE 3 1MSGV0004-- -KZZ 1.00 RANDOM FAILURE TO CLOSE GOV. VALVE 4 1MSGV0002"-*KZZ 1.00 RANDOM FAILURE TO CLOSE GOV. VALVE 2 1MSGV0001----KZZ 1.00 RANDOM FAILURE TO CLOSE GOV. VALVE 1 1ACTR139-----MC5 1.00 4160-480V TRANS-FORMER 139 15 UNAVAILABLE DUE TO MAINTENANC 1CSCV009----KZZ 1.00 RANDOM FAILURE OF CHECK VALVE CS009 To CLOSE 1CSCV005-- --KZZ 1.00 RANDOM FAILURE OF CHECK VALVE CS005 TO CLOSE 1CSCV0013---KZZ 1.00 RAN00M FAILURE OF CHECK VALVE CS0013 TO CLOSE 1AFPM005006--ACC 1.00 COMMON CAUSE FAILURE To START MDPS 1FWOO5 AND 1FWOO6 1ACCB1393A--UC5 1.00 CIRCUIT BREAKER 1393A FROM 480V ESF BUS 139 TRANSFERS OPEN 1ACCB13834---UC7 1.00 CIRCUlf BREAKER 1383A FROM 480V ESF BUS 138 TRANSFERS OPEN IVCAVFCV121--VZZ 1.00 CHARGING PUMP FCV RANDOM FAIL. TO REMAIN OPEN FCV-VC 121 BCCPM007-* --XK1 1.00 PUMP OE RANDOMLY FAILS TO RUN 1ESCNTRIBS3&4001 1.00 TEST RELAY TRIBS/TR1 CONTACTS 3&4 $PUR!auSLY OPEN 1ESCN17TR17&8001 1.00 TEST RELAT TR1/17 CONTACTS 718 SPURIOUSLY OPEN 1ESCN14C4&D4-001 1.00 TEST SWITCH #14 N-T CONTACTS C4&D4 SPURIOUSLY OPEN 1ATMYFWOO57--DZZ 1.00 MOTOR OPERATED VALVE FWOO57 RANDOMLY FAILS TO OPEN 1AFMVFWOO55--DZZ 1.00 MOTOR OPERATED VALVE FWOO55 RANDOMLY FAILS TO OPEN 1AFMVFWOO53--DZZ 1.00 MOTOR OPERATED VALVE FWOO53 RANDOMLY FAILS TO OPEN 1AFMVFWOO51-DZZ 1.00 MOTOR OPERATED VALVE FWOO51 RANDOMLY FAILS TO OPEN 1ACCB14728292KCC 1.00 FD. BRER. 1472 & 1482 & 1492 Fall TO CLOSE DUE TO COMMON CAU 1AFAMSG1D305-DCC 1.00 SG 1D SAFETY VALVES (3/5) FTO DUE TO C.C.

(10 PAIRS) 1AFAMSG1C305-DCC 1.00 SG 1C SAFETY VALVES (3/5) FTO DUE TO C.C.

(10 PAIRS) 1AFAMSG18305-DCC 1.00 SG 1B SAFETY VALVES (3/5) FTO DUE TO C.C.

(10 PAIRS) 1AFAMSG1A305-DCC 1.00 SG 1A SAFETY VALVES (3/5) FTO DUE TO C.C.

(10 PAIRS) 1AFMYTHROTLCCDCC 1.00 AFW THROTTLE VALVES (8) Fall DUE TO COMMON CAUSE ISICV8900ABD-DCC 1.00 CHECK VALVES 1518900A, B, D FAIL TO OPEN DUE TO COMMON CAUSE ISICV8900BCD-DCC 1.00 CHECK VALVES 15189008, C, D FAIL TO OPEN DUE TO COMMON CAUSE 1SICV8900ACD-DCC 1.00 CHECK VALVES 1S18900A, C, D FAIL TO OPEN DUE TO COMMON CAUSE 1SICV8900ABC-DCC 1.00 CHECK VALVES 1518900A, B, C FAIL TO OPEN DUE TO COMMON CAUSE 1SIMV8804AB-DCC 1.00 MOTOR OPERATED VALVE 1S!8804A & B FAIL TO OPEN DUE TO C. CAU 1ACCB1341- --UO3 1.00 FD. BREAKER 1341 TO BUS 134 TRANSFERS OPEN 1CSCV0005---DJ5 1.00 CHECK VALVE 1CS0005 FAILS TO OPEN RANDOMLY 1CSCV000F ---DJ5 1.00 CHECK VALVE 1CS0003 FAILS TO OPEN RANDOMLY 1ACCB1443---UO3 1.00 CIRCUIT BREAKER 1443 FROM 480V BUS 144 TRANSFERS OPEN 1VCxV8434 " --KZZ 1.00 BLOCK VALVE BLENDER TO RWST FTC VC-8434 IVCXV8432---KZZ 1.00 ISOLATION VALVE BLENDER TO RWST FTC VC-8432 1ACTR137----MD1 1.00 4160-480V TRANS-FORMER 13715 UNAVAILABi.E DUE TO MAINTENANC 1ACCB14821492KCC 1.00 FD. BRKR. 1482 & 1492 FAIL TO CLOSE DUE TO COMMON CAUSE

,c ab Page 8 Septeeer 10, 1993 1ACCB1442--~UD3 1.00 FD. BREAKER 1442 TO BUS 144 TRANSFERS OPEN TCCMV9412AB -DCC 1.00 -

MOVS 1CC9412A.B FAIL TO OPEN DUE TO COMMON CAUSE a

2CCPM004-----XK1 1.00 PUMP 08 RANDOMLY FAILS TO RUN 1DCCB011C12--UE1 1.00 FD BR. C1-2 FROM DC BUS 011-1 TO PANEL 1CB37 TRANSFERS OPEN 1DCCBRE17-+--UE1 1.00 FD BREAKER E1*7 FROM DC BUS 111 TO 1CB38 TRANS-FERS OPEN 1DCCBC12----UE3 1.00 FD BREAKER C12 FROM DC BUS 011-1 TRANSFERS OPEN 1AFAMSG1D505-DCC 1.00 SG 10 SAFETY VALVES (5/5) FTO DUE TO C.C 1AFAMSG1D405-DCC 1.00 SG 10 SAFETY VALVES (4/5) FTO DUE TO C.C.

-(5 PAIRS) 1AFAMSG1C505-DCC -

1.00' SG 1C SAFETY VALVES (5/5) FTO DUE TO C.C 1AFAMSG1C405-DCC 1.00 SG 1C SAFETY VALVES (4/5) FTO DUE TO C.C.

(5 PAIRS) 1AFAMSG18505-DCC 1.00 SG 18 SAFETY VALVES (5/5) FTO DUE TO C.C 1AFAMSG18405-DCC 1.00.

SG 18 SAFETY VALVES (4/5) FTO DUE TO C.C.

($ PAIRS) 1AFAMSG1A505-DCC..

1.00 SG 1A SAFETY VALVES (5/5) FTO DUE TO C.C 1AFAMSG1A405-DCC 1.00 SG 1A SAFETY VALVES (4/5) FTO DUE TO C.C.

(5 PAIRS) 1ACTR138 ----QC7' 1.00 4160-480V TRANS-FORMER 138 FAILS 1SIMV8811AB-DCC 1.00 MOTOR OPERATED VALVE 1518811A & B FAIL TO OPEN COMMON CAUSE 1SFXV8762A/B-KCC 1.00 COMMON CAUSE FAILURE OF SF-8762B AND SFB762A-1AFAMSG1D205-DCC

'1.00 SG 1D SAFETY VALVES (2/5) FTO DUE TO C.C.

(10 PAIRS) 1AFAMSG1C205-DCC 1.00 SG 1C SAFETY YALVES (2/5) FTO DUE TO C.C.

(10 PAIRS) 1AFAMSG18205-DCC 1.00 SG 1B SAFETY VALVES (2/5) FTO DUE TO C.C.

(10 PAIRS) 1AFAMSG1A205-DCC

.1.00 SG 1A SAFETY VALVES (2/5) FTO DUE TO C.C.

(10 PAIRS) 1AFCVFWOO33-DL4 1.00 CHECK VALVE 1FWOO33 FAILS TO OPEN

~1DCBT011111--FCC 1.00 BATTERY 011 AND 111 FAIL DUE TO A COMMON CAUSE 1ACTR134- -- 003 1.00 4160-480V TRANS-FORMER 134 FAILS 1AFCVFWOO32--DL4 1.00 CHECK VALVE 1FWOO32 FAILS TO OPEN 1MSXXMS218FK-DCC 1.00 COMMON CAUSE FAILURE OF SDV 1PCV-MS218,MS21F MS21K 1SWCV11------DR1 1.00 -

CHECK VALVE ISW0001 RANDOMLY FAILS TO OPEN 1RCAVPCV455C-DZZ 1.00 RANDOM FAILURE OF PORY PCV-455C TO OPEN 1RCAVPCV456--D2Z 1.00 RANDOM FAILURE OF PORY PCV-456 TO OPEN 1ACCB4B73A958UCC 1.00-CB 13748, 1373A AND 13958 TRANS-FER OPEN DUE TO A COMMON CA 1ACCB1422-~ -UD3 1.00 FD. BREAKER 1422 to BUS 142 TRANSFERS OPEN (GIVEN CLOSED) 1VCPM0006--- XK2 1.00 FAILURE OF CNARGING PUMP 1A TO CONTINUE RUNNING 1ACCB1424----UD3 1.00 FD. BREAKER 1424 To BUS 147 TRANSFERS OPEN 1ACTR138- ---MC7 1.00 4160-480V TRANS-FORMER 138 IS UNAVAILABLE DUE TO MAINTENANC 1MSAV0019AM -DZZ 1.00 ARY MOV-MS0019 VALVE STICKS OR FAILS TO OPEN (FAULT. IN VALVE' 1MSAV0017AM -DZZ 1.00 ARV MOV-MS0017 VALVE STICKS OR FAILS TO OPEN (FAULT IN VALVE BESRE1819---FCC.-

1.00 TVS 18 & 19 RELAYS FAIL DURING OPERATION DUE TO CC 1MSAV0018AM ~DZZ 1.00 V MOV-MS0018 VALVE STICKS OR FAILS TO OPEN (FAULT IN VALVE 1ACCB1471----UC5 1.00 vu. BREAKER 1471 TO BUS 147 TRANSFERS OPEN

-BESRE1718a--FCC 1.00 DIVS 17 & 18 RELATS Fall DUE TO CC 25WCY21-*---DR1 1.00 CHECK VALVE 25W0001 RANDOMLY FAILS TO OPEN 2ACTR242~---oxX 1.00 OUTPUT FROM SYSTEM AUXILIARY TRANSFORMER 242 FAILS 1DCCBF113- -UE1'

't.00 FD BREAKER F1-13 FROM DC BUS 112 TRANSFERS OPEN 1DCCBE113 - -UE1 1.00 FD BREAKER E1 13 FROM DC BUS 111 TRANSFERS OPEN' 1FPCVFP0002-DZZ 1.00 RANDOM FAILURE OF CHECK VALVE FP0002.TO OPEN -

1DCCBRE!34---UE1 1.00 FD. BRKR. REl-34 FROM DC BUS 111 TRANSFERS OPEN-1DCCBRFI32"-UE1 1.00 FD. BRKR. RFI 32 FROM DC BUS 112 TRANSFERS OPEN BSW.m01020102XCC

,1.00 PUMPS 1A, 18, 2A & 28 FAIL TO RUN DUE TO CC~

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Page 9 September to, 1993 1ESRED19D18R7XCC 1.00 RELAY RT DIV 19 & DIV 18 FAILS DURING OPER. DUE To COMMON CA 1ESRE19171718FCC-1.00 ~

~ DIV 19 RELAY R1, DIY 17 RELAY R1 & R2 & DIV 18 RELAY R1 FAIL 1AFRVMS0029--DZZ-1.00 SG 1B SAFETY VALVE 1MS0029 RANDOMLY FAILS TO OPEN 1AFRVMS0019--DZZ 1.00 SG IC SAFETY VALVE 1MS0019 RANDOMLY FAILS TO OPEN 1 AFRWS0030- DZZ 1.00 SG 1B SAFETY VALVE 1MS0030 RANDOMLY FAILS TO OPEN 1AFRVM50032--DZZ 1.00 SG 1B SAFETY VALVE 1MS0032 RANDOMLY FAILS TO OPEN 1AFRVMS0026--DZZ 1.00 SG 10 SAFETY VALVE 1M50026 RANDOMLY FAILS TO OPEN -

1 AFRWS0024--DZZ 1.00 SG 1D SAFETY VALVE 1MS0024 RANDOMLY FAILS TO OPEN 1AFRVMS0021*-DZZ 1.00 SG 1C SAFETY VALVE 1MS0021 RANDOMLY FAILS TO OPEN 1AFRVMS0020--DZZ-1.00 SG 1C SAFETY VALVE 1MS0020 RANDOMLY FAILS TO OPEN 1AFRvMS0027--DZZ 1.00 SG 10 SAFETY YALVE 1MS0027 RANDOMLY FAILS TO OPEN 1 AF RVMS0031--DZZ 1.00 SG 1B SAFETY VALVE 1M50031 RANDOMLY FAILS TO OPEN 1ATRvMS0025--DZZ

1.00 SG 1D SAFETY VALVE 1MS0025 RANDOMLY FAILS TO OPEN 1AFRvMS0028--DZZ 1.00 SG 10 SAFETY VALVE 1MS0028 RANDOMLY FAILS To OPEN 1AFCV00070006DL2-1.00-COMMON CAUSE FAILURE TO OPEN CV 1MS0007 AND CV 1MS0006 1AFRVMS0023--DZZ 1.00 SG 1C SAFETY VALVE 1MS0023 RANDOMLY FAILS TO OPEN 1AFRVMS0022-DZZ 1.00 SG 1C SAFETY VALVE 1MSD022 RANDOMLY FAILS TO OPEN 1AFRVMSOP14--DZZ 1.00 SG 1A SAFETY VALVE 1MS0014 RANDOMLY FAILS TO OPEN r

1AFRVMS0033*-DZZ 1.00 SG 18 SAFETY VALVE 1M50033 RANDOMLY FAILS TO OPEN 1AFRVM50017-DZZ 1.00 SG 1A SAFETY VALVE 1MS0017 RANDOMLY FAILS TO OPEN 1AFRvMS0015-DZZ 1.00 SG 1A SAFETY VALVE 1M50015 RANDCMLY FAILS TO OPEN 1 AF;WMS0016--DZZ 1.00 SG 1A SAFETY VALVE 1MS0016 RANDOMLY FAILS TO OPEN 1AFRVMS0018--DZZ 1.00 SG 1A SAFETY VALVE 1MS0018 RANDOMLY FAILS TO OPEN 1RCMVRC80008-CZZ 1.00 PORY FLOW PATM INOPERABLE DUE TO BLOCK VALVE RC80008 CLOSURE 1RCMVRC8000A-CZZ 1.00 PORY FLOW PATM IN0PERA9tE DUE TO BLOCK VALVE RC8000A CLOSURE 1ACC8374B3955UCC 1.00 CB 13748 AND 13958 TRANSFER OPEN DUE TO A COMMON CAUSE 1ACC8373A3958UCC 1.00 CB 1373A AND 13958 TRANSFER OPEN DUE TO A COMMON CAUSE 1MSCCMS215---FZZ 1.00 CONTROL CIROJti FAILURE FOR STEAM DUMP VALVES IVCPM007-- --AK4 1.00 CMARGING PUMP 15 FAILS TO START BSWPM1C2C----ACC

.1.00 PUMPS 1C & 2C FAIL TO START DUE TO CC 1VCPM007---~ MK4 1.00 CHARGING PUMP 15 UNAVAILABLE DUE TO MAINTENANCE 1MSxxMS21F21KDZZ 1.00 COMMON CAUSE FAILURE OF SOY 1PCV-MS21F AND 1PCV-MS21K 1MSXxMS21821KDCC 1.00 Co**quN CAUSE FAILURE OF SDV 1PCV-MS21B AND 1PCV-MS21K 1MSXxMS21821FDCC 1.00 COMMON CAUSE FAILURE OF SDV 1PCV-MS21B AND 1PCV-MS21F 1MSPMMS218~-FZZ' 1.00.

CIRCULATING WATER Pt.MP FAILURE 1ACC8434444-UCC 1.00 FD. BREAKER 1434 AND 1444 TRANS-FER OPEN DUE TO COMMON C'US 1ACBS139 --~ MC5 1.00 480V ESF BUS 139 IS UNAVAILABLE DUE TO MAINTENANCE:

1ACC8481491-UCC 1.00

-FD. BREAKER 1481 AND 1491 TRANS-FER OPEN DUE TO COMMON CAUS 1AFPM005006--XCC-1.00 COMMON CAUSE FAILURE TO RUN POPS 1FWOO5 AND 1FWO06 1ACC81492----KC5 1.00 FD. BRKR. 1492 To ESF BUS 149 FAILS TO CLOSE -

1ACBS138-- --MC7 1.00' 480V ESF BUS 138 IS UNAVAILABLE DUE'TO MAINTENANCE 1ACCB1482 - ~ KC7 1.00 FD. BRKR. 1482 TO ESF BUS 148 FAILS TO CLOSE 1DCCBE113F1130CC 1.00 C8 E1 13 AND F1-13 TRANSFER OPEN DUE TO COMMON CAUSE 2CCCV94638*- DK1 1.00-

-CHECK VALVE 2CC94638 RANDOMLY FAILS TO OPEN

'1AFMVFWOO51 KA2 1.00 FAILURE OF AFW MOV FWOO51 TO CLOSE DUE TO HARDWARE

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FAILURE OF AFW MOV FWOO50 TO CLOSE DUE TO HARDWARE 1ESRE17R1 ---F01 1.00-Div 17 RELAY R1 FAILS DURING OPERATION -

1ESCM18TSD2ABKCT 1.00 OlY 18 TIMER TSD CONTACTS 2A&29 FAIL TO CLOSE,04 DEMAND

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Page to Septenber 10, 1993 1ESCN17R3182-KD1 1.00 DIV 17 RELAY R3 CONTACTS 1&2 FAIL TO CLOSE ON DEMAND ISICV89228---DZZ 1.00 CHECK VALVE 1S189228 RANDOMLY FAILS TO OPEN 1ESCN1TR3354-KD1 1.00 DIV 17 RELAY R3 CONTACTS 3&4 FAIL TO CLOSE ON DEMAND DESRE29R828R8FCC 1.00 DIVS 29 & 28 RELAYS FAIL DURING OPERATION DUE TO CC

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1ESCN18R6112 KC7 1.00 DIV 18 RELAY R6 CONTACTS 1&2 FAIL TO CLOSE ON DEMAND 1ESRE171819R5FCC 1.00 DIV 17,18 & 19 RELAY R5 FA!LS DURING OPERATION DUE TO CC 1CCXV9485AB--FCC 1.00 COMMON CAUSE FAILURE OF ISOL. VALVES FOR CCW TO CHG. PUMPS 1CCXV358367--DCC 1.00 CCF OF VALVES 0358, 0367 TO OPEN 1CCxv358362*-DCC 1.00 CCF OF VALVES 0358, 0362 TO OPEN 1CCxv355367--DCC 1.00.

CCF OF VALVES 0355, 0367 TO OPEN 1CCxV355362--DCC 1.00 CCF OF VALVES 0355, 0362 TO OPEN 1ACDPMcC1383BMK1 1.00 MCC 13838 IS UNAVAILABLE DUE TO MAINTENANCE 1ACDPMcC1393CMK1 1.00 MCC 1393C IS UNAVAILABLE DUE TO MAINTENANCE 1$1PM004-----A17 1.00 SI PUMP 1B RANDOMLY FAILS TO START 7

1SICV900280--DCC 1.00 CHECK VALVES 1519002B, D Fall TO OPEN DUE TO Cape 904 CAUSE 1SICV9002AD -DCC 1.00 CHECK VALVES 1SI9002A, D FAIL TO OPEN DUE TO COMMON CAUSE 1AFCV00696867DCC 1.00 COMMON CAUSE FAILURE OF CV 1FWOO69 AND 0068 AND 0067 TSICV9001BD-*DCC 1.00 CHECK VALVES 1SI90018, D FAIL TO OPEN DUE TO COMMON CAUSE 1AFCv006968660CC 1.00 CDPHON CAUSE FAILURE OF CV 1FWOO69 AND 0068 AND 0066 ISICV9001AD -DCC 1.00 CHECK VALVES 1SI9001A, D FAIL TO OPEN DUE TO COMMON CAUSE 1AFCV00696766DCC 1.00 COMMON CAUSE FAILURE OF CV 1FWOO69 AND 0067 AND 0066 1AFCV00686766DCC 1.00 COMMON CAUSE FAILURE OF CV 1FWOO68 AND 0067 AND 0066 BCCPM005-----MK1 1.00' PUMP 00 UNAVAILABLE DUE TO MAINTENANCE 1ACTR134-----M03 1.00 4160-480V TRANS-FORMER 134 IS UNAVAILABLE DUE TO MAINTENANC BCCPM006-----MK1 1.00 PUMP OD UNAVAILABLE DUE TO MAINTENANCE 1DCCBRFI23---UE1 1.00 FD BREAKER RFI-23 FROM DC BUS 112 TRANSFERS OPEN -

1SICV9002CD--DCC-1.00 CHECK VALVES 1SI9002C, O FAIL TO OPEN DUE TO COMMON CAUSE 1DCCSC16-----UE3 1.00 FD BREAKER C16 FROM DC BUS 011-1 TRANSFERS OPEN 1SICV9001CD--DCC 1.00.

CHECK VALVES 1S19001C, D Fall TO OPEN DUE TO COMMON CAUSE 1SFxV87628---KZZ 1.00 SPENT FUEL PIT HEAT EXCHANGER OUTLET BLOCK VLV FTC SF-87628 ISFxV8762A---KZZ 1.00 SPENT FUEL Pli HEAT EXCHANGER' INLET BLOCK VLV FTC SF-8762A 2DCBY211- ---FE2 1.00 BATTERY 211 FAILS 1ACTR137139--QCC 1.00 4160-480V TRANS-FORMER 139 AND 137 FAIL DUE TO COMMON CAUSE 1LOLOSGLV&OPACTN 1.00 FAILURE OF LO-LO SG LEVEL S!CNAL & OP. ACTION TO START PUMPS 1ACBS139----FC5 1.00 480V ESF BUS 139 FAILS 1ESCN19fS03ABKC5 1.00 DlV.19 TIMER TSD CONTACTS 3A&3B FAIL TO CLOSE ON DEMAND 1ESCN18TSD3ABKC7-1.00 DIV 18 TIMER TSO CONTACTS 3A&38 FAIL TO CLOSE 04 DEMAND 1DCCBF117----UE1

'1.00 FD. BRKR. F1-17 FROM DC BUS 112 TRANSFERS OPEN 1AFCV006900680CC 1.00 COMMON CAUSE FAILURE OF CV 1 FWD 069 AND 1FWOO68 1AFCV00690067DCC 1.00 COMMON CAUSE FAILURE OF CV 1FWOO69 AND-1FWOO67 1AFCV00690066DCC 1.00 COMMON CAUSE FAILURE OF CV.1FWOO69 AND 1FWOO66

'1AFCv00680067DCC 1.00 COMMON CAUSE FAILURE OF CV 1FWOO68 AND 1FWOO67 1AFCV006800660CC 1.00 COMMON CAUSE FAILURE Of CV 1FWOO68 AND 1FWOO66.

1AFCV006700660CC 1.00 COMMON CAUSE FAILURE OF CV 1FWOO67 AND 0066 -

1ESCN19R71112KC5-1.00 DIV 19 RELAY R7 CONTACTS 11412 Fall TO CLOSE ON DEMAND BSWPM1A1928--xCC 1.00' PUMPS 1A, 1B & 28 FAIL TO RUN DUE TO CC 1ESCN18R71&2-KCT 1.00.

DIV 18 RELAY R7 CONTACTS 1&2 FAIL TO CLOSE ON DEMAND 1CCxv94858---KZZ ',1.00 RANDOM FAILURE TO CLOSE VALVE CC-94858-

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6 Page 11 September 10, 1993 1CCKV9485A---KZZ 1.00-RANDOM FAILURE OF VALVE CC-9485A, FAILS TO CLOSE 1CCxv0367----0ZZ 1.00 RANDOM FAILURE TO OPEN DRAIN ISOL, VALVE CC0367 1CCxv0362----DZZ 1.00 RANDOM FAILURE TO OPEN DRAIN ISOL. VALVE CC0362 1CCxv0358----DZZ 1.00 RANDOM FAILURE TO OPEN DRAIN ISOL. VALVE CC0358 1CCxv0355----DZZ 1.00 RANDOM F AILURE TO OPEN DRAIN ISOL. VALVE CC0355 1ESRE18R1----FC7 1.00 Div 18 RELAY R1 FAILS DURING OPERATION 1 ACDPMCC1391-MC5 1.00 MCC 1391 IS UNAVAILASLE DUE TO MAINTENANCE 1 ACDPMCC1391-FC5 1.00 MCC 1391 FAILS 1ESCN19TEDZABKC5 1.00 2ESCN28R61&2*KC8 1.00 1ESCN19Rii'2-KC5 1.00 1ACSS138-----FC7 1.00 480V ESF BUS 138 FAILS 25WFLOO4-----PR1 1.00 SW STRAINER 2A RANDOMLY FAILS (PLUGS)

TVCPM007--- -xK4 1.00 CHARGING PUMP 18 FAILS TO RUN 1YCPM006-----XZZ 1.00 CHARGING PUMP 1A RANDOMLY FAILS TO RUN 1ESHEPHASE-A-HB1 1.00 OPERATOR FAILS TO MANUALLY INITI ATE PHASE A ISOLATION 1DCFU14--- --BE1 1.00 15 AMP FUSE 14 FROM DISTR. CAB. BUS 114 FAILS 10CC8C116----UE3 1.00 FD. BRKR. C1-16 FROM DC BUS 011-1 TRANSFERS OPEN BSWPM1B28----ACC 1.00 PUMPS 1B & 28 FAIL TO START DUE TO CC 2ESCN28TSD2ABKC8 1.00 1ACDPMCC1381BMC7 1.00 MCC 13818 IS UNAVAILABLE DUE TO MAINTENANCE 1MSSV01020304KCC 1.00 CCF OF STOP VALVES SV0001, SV0002,SV0003 & SV0004 TO CLOSE 1MSGY01020304KCC 1.00 CCF OF GOV. VALVES GV0001, GV0002,GV0003, GV0004 TO CLOSE 1ACDPMCC1381BFC7 1.00 MCC 1381B FAILS 25WFLOO5-----PR1 1.00 SW STRAINER 2B FAILS RANDOMLY (PLUGS) 1MSAV018019--DCC 1.00 CCF TO OPEN OF ARY MS0018 AND MS0019 1MSAV017019--DCC 1.00 CCF TO OPEN OF ARY MS0017 AND MS0019 1MSAV017018--DCC 1.00 CCF TO OPEN OF ARY MS0017 AND MS0018 1AFTKSC001---R01 1.00 FAULT PRIOR TO INPUT OF SEG. V CST ISC001 FAILS OR LARGE LEA 2ESCN29fSD2ABKC6 1.00 2ESCN29R6182-KC6 1.00 1ACBS147-----MC5 1.00 BUS 147 UNAVAILABLE DUE 10 MAINTENANCE 1SIMVB8078---DZZ 1.00 MOTOR OPERATED YALVE 1 SIB 807B FAILS TO OPEN 1ACBS147-----FC5 1.00 BUS 147 FAILS 2DCBY212-----FE2 1.00 BATTERY 212 FAILS 1ESCNSix482L6KE1 1.00 NO SIGNAL TO 1LCV-VC112E, Six4-8 CTS 256 FTC ON OEMAND 1CCXV94858---MZZ~

1.00 MAINTENANCE UNAVAILABILTY OF VALVE CC-94858 1ESCN18TR13&40C7 1.00 TEST RELAY TR1/18 CONTACTS 344 SPURIOUSLY OPEN 1ACDPMCC1393 CMC 5 1.00 MCC 1393C IS UNAVAILABLE DUE TO MAIPTENANCE BSWMTSTBYMANLHB1 1.00 FAILURE TO PLACE UNAFFECTED UNIT IN HOT SMTDN PER AOP 4.2 1Ctxv0367----MZZ 1.00 MAINTENANCE UNAVAILABILITY OF VALVE CC0367 1ACDPMcC1393CFC5 1.00 MCC 1393C FAILS 1CCxv0362----MZZ 1.00 MAINTENANCE UNAVAILABILITY OF VALVE CC0362 1CCxv0358-*--MZZ 1.00 MAINTENANCE UNAVAILABILITY OF VALVE CCO358 1CCxv0355--- MZZ 1.00 MAINTENANCE UNAVAILABILITY OF VALVE CC0355 1CCPM007-----xK1-1.00 PUMP OE RANDOMLY FAILS TO CONTINUE TO RUN 1ACDPMCC1393AMD1 1.00 MCC 1393A IS UNAVAILABLE DUE TO MAINTENANCE 1CCPM006-----AK1 1.00 PUMP OD RANDOMLY FAILS TO START

Page 12 Septenber 10, 1993 1CCPM005-----AK1 1.00 PUMP OC RANDOMLY FAILS TO START 1ACDPMCC1393AFD1 1.00 MCC 13934 FAILS BSWPM1828----xCC 1.00 PUMPS 1B & 28 Fall TO RUN DUE TO CC BSWCv1121----DCC 1.00 1ESCNSIX48182KE1 1.00 NO SIGNAL TO 1MOV-SI88018, Six4-8 CTS 18&22 FTC ON DEMAND 1EschslX4A2&6KE1 1.00 NO SIGNAL TO 1LCV-VC1120, Six4-A CTS 2&6 FTC ON DEMAND 1ESCNSIx4A182KE1 1.00 NO SIGNAL TO 1MOV-stb 801A, Six4-A CTS 18&22 FTC ON DEMAND 20CCBRE134---UE7 1.00 FD. BRKR. REl-34 FROM DC BUS 211 TRANSFERS OPEN 2DCCB21182---UE2 1.00 CIRCUIT BREAKER 211B2 FRCN BATT-ERY 211 TRANSFERS OPEN 20CBT212 ----FE5 1.00 BATTERY 212 RANDOMLY FAILS 1 ACDPMcC1372-MD1 1.00 MCC 1372 IS UNAVAILABLE DUE TO MAINTENANCE 1ESCN17TR13&4001 1.00 TEST RELAY TR1/17 CONTACTS 3&4 SPURIOUSLY OPEN 2ACCB434444--UCC 1.00 FD. BREAKER 2434 AND 2444 TRANS-FER OPEN DUE TO COMMON CAUS 1WDAV178-----KZZ 1.00 FAILURE OF VALVE FCV-WD17B TO CLOSE ON DEMAND 1WDAV17A17B--KCC 1.00 CCF OF FCV-WD17A AND FCV-WD17B TO CLOSE 1WDAV17A- ---KZZ 1.00 FAILURE OF VALVE FCV-WD17A TO CLOSE ON DEMAND 1ESCN15A118110C7 1.00 TEST SWITCH #15 N-T CONTACTS A11&B11 SPURIOUSLY OPEN 1ESCN14A11811001 1.00 TEST SWITCH #14 N-T CONTACTS A11&B11 SPURIOUSLY OPEN 1VCCV8481A--*DZZ 1.00 CHECK VALVE 1VC8481A RANDOMLY FAILS TO OPEN 1ACBS137 ----MD1 1.00 480V ESF BUS 137 15 UNAVAILABLE DUE TO MAINTENANCE 1ACCB4748494 UCC 1.00 CB 1474, 1484 AND 1494 TRANS-FERS OPEN DUE TO A COMMON CAUS 10CCB16E13F13UCC 1.00 CB Cl-6, E1-13, AND F1-13 TRANS-FER OPEN DUE TO COMMON CAUS 15tCV89000---0ZZ 1.00 CHECK VALVE 15189000 RANDOMLY FAILS TO OPEN 1SICv8900C---DZZ 1.00 CHECK VALVE 1 SIB 900C RANDOMLY FAILS TO OPEN ISICv89008---DZ2 1.00 CHECK VALVE 15189008 RANDOMLY FAILS TO OPEN 1ACCB471491-UCC 1.00 FD. BREAKER 1471 AND 1491 TRANS-FER OPEN DUE TO COMMON CAUS 1SICV8900A---DZZ 1.00 CHECK VALVE IS!8900A RANDOMLY FAILS TO OPEN 1AFCY00320033DCC 1.00 COMMON CAUSE FAILURE CV 1FWOO32 AND 1FWOO33 1ACCB424444--UCC 1.00 FD. BREAKER 1624 AND 1444 TRANS-FER OPEN DUE TO COMMON CAUS 1ACCB383A393AUCC 1.00 CB 13834 AND 1393A TRANSFER OPEN DUE TO A COMMON CAUSE 1MSSYO20304 -KCC 1.00 CCF OF STOP VALVES SV0002, Sv0003,SV0004.TO CLOSE 1MS$V0104----KCC 1.00 CCF OF STOP VALVES SV0001, SV0004 To CLOSE 1MSSV010304--KCC 1.00 CCF OF STOP VALVES SV0001, SY0003,SV0004 TO CLOSE 1MSSv010204--KCC 1.00 CCF OF STOP VALVES SV0001,SV0002 SV0004 To CLOSE 1MSSV010203--KCC 1.00 CCF OF STOP VALVES SV0001, SV002 SV0003 TO CLOSE 2

20CCB18221281UCC 1.00 1MSGV010304--KCC 1.00 CCF OF GOV. VALVES GV0001,. GV0003,Gv0004 1MSGV010204--KCC 1.00 CCF OF GOV. VALVES GV0001, Gv0002,GV0004 TO CLOSE 1ACBS142-----F03 1.00 BUS 142 FAILS IMSGV010203--KCC 1.00 CCF OF GOV. VALVES Gv0001,GV0002 Gv0003 To CLOSE 2DCCBE114- --UE2 1.00 FD BREAKER El-16 FROM DC BUS 211 TRANSFERS OPEN 1ACTR138139--oCC 1.00 4160-480V TRANS-FORMERS 138, 139 Fall DUE TO Carmoel CAUSE BCCPM003007--XCC 1.00 PUMPS DA & OE FAIL TO CONTINUE TO RUN DUE TO CC 1MSAV171819-DCC 1.00 CCF TO OPEN OF ARV MS0017, MS0018 AND MS0019 2ACCB481491--UCC-1.00 FD. BREAKER 2481 AND 2491 TRANS-FER OPEN DUE TO COMMON CAUS 1ACCB13820---UC7 1.00 circuli BREAKER 1382D FROM 480V ESF BUS 138 TRANSFERS OPEN 1CSCV0301109-DCC 1.00 CHECK VALVES 3.11,9 FAIL TO OPEN DUE TO CC 1CSCV0090013 KCC 1.00 CCF OF CHECK VALVES CS005, CS009 AND CS0013 TO CLOSE

Page 13 Septeciber 10, 1993 iCSCV005009--KCC 1.00 CCF OF CHECK VALVES CS005 AND CS009 TO CLOSE 1CSCV0050013-KCC 1.00 CCF OF CHECK VALVES CS005 AND CS0013 TO CLOSE 1ACTR13713839QCC 1.00 TRANSFORMER 137, 138 AND 139 Fall DUE TO A COMMON CAUSE 1CSCV0013009-KCC 1.00 CCF OF CHECK VALVES CS0013 AND CS009 TO CLOSE 1ESSW290-----FBI 1.00 MANUAL PHASE A ISOLATION SWITCH #290 FAILS 1ESSW131290--FCC 1.00 MANUAL PHASE A ISOLATION SWITCH 131 AND 290 FAIL COMMON CAUS 1ESSW131- ---FBI 1.00 MANUAL PHASE A ISOLATION SWITCH #131 FAILS 1ESRETR1TR2--FCC 1.00 RELAY COILS CIAX2/TR2 AND CIAX1/TR1 FAIL COMMON CAUSE 1ESRERS48 "--F01 1.00 RELAY RS4B/17-2 COIL FAILS DURING OPERAfl0N 1ESRERS172181FCC 1.00 RELAY ColLS RS9/17-2 AND RS9/18-1 FAIL COMMON CAUSE 1ESRERB172181FCC 1.00 RELAY COILS RS48/17-2 AND RS4B/18-1 Fall COMMON CAUSE 1ESRECV!1CVl2FCC 1.00 RELAY COILS CVI1/TR1 AND CV12/TR2 FAIL COMMON CAUSE 1ESRECIAX2---FE1 1.00 RELAY CIAX2/TR2 Coll FAILS DURING OPERA 110N 1ESRECIA2----FE1 1.00 RELAY CIA 2/TR2 COIL FAILS DURING OPERATION 1ESRECIA1 CIA 2FCC 1.00 RELAY ColLS CIA 2/TR2 AND CIA 1/TR1 FAIL COMMON CAUSE 1ESRECIA1----FE1 1.00 RELAY CIAX1/TR1 C0!L FAILS DURING OPERATION 1ESRE8RS48---FC7 1.00 RELAY RS4B/18-1 COIL FAILS DURING OPERAfl0N 1ACDPMcC1393BMK1 1.00 MCC 1393B IS UNAVAILABLE DUE TO MAINTENANCE 1ESRE19R6----FC5 1.00 DIV 19 RELAY R6 RANDOMLY FAILS DURING OPERATION 1ESRE19R5----FC5 1.00 DIV 19 RELAY R5 FAILS DURING OPERATION 1ACDPMCC1393BFK1 1.00 MCC 13938 FAILS 1ACCB1374A---UD1 1.00 CIRCUIT BREAKER 1374A FROM 480V ESF BUS 137 TRANSFERS OPEN 1ESRE19R11717FCC 1.00 DIV 19 RELAY R1, DIV 17 RELAY R1 & DIV 17 RELAY R2 FAIL CC 1ESRE1917R5--FCC 1.00 Div 19 AND 17 RELAY R5 FAILS DURING OPERATION DUE TO CC 1ESRE1917R218FCC 1.00 DIV 19 RELAY R1, DIV 17 RELAY R2 & DIV 18 RELAY R1 FAIL CC 1ESRE191718R1FCC 1.00 DIV 19 RELAY R1, DIV 17 RELAY R1 & DIV 18 RELAY R1 FAIL CC 1ACDPMCC1393AMK1 1.00 MCC 1393A is UNAVAILABLE DUE TO MAINTENANCE 1ESRE18R6----FC7 1.00 DIV 18 RELAY R6 RANDOMLY FAILS DURING OPERATION iCCPM006-----XK1 1.00 PUMP 00 RANDCMLY FAILS TO RUN 1ESRE18RS----FC7 1.00 DIV 18 RELAY R5 FAILS DURING OPERATION 1CCPM005--+--XK1 1.00 PUMP DC RANDOMLY FAILS TO RUN 1ACDPMcC1393AMC5 1.00 MCC 1393A IS UNAVAILABLE DUE TO MAINTENANCE 1ESRE1819R5--FCC 1.00 DIY 18 AND 19 RELAY R5 FAILS DURING OPERATION DUE TO CC 1ESRE1817R5--FCC 1.00 DIV 18 AND 17 RELAY R5 FAILS DURING OPERAfl0N DUE TO CC 1ACDPMCC1393AFK1 1.00 MCC 1393A FAILS YHR SB2 1.00 POWER RECOV FAILURE PROB AT 24 HRS /NO RECOVERY AT 2 NRS 1ESIEE17R117R2FCC 1.00 DIV 17 RELAY R1 AND DIV 17 RELAY R2 Fall DUE TO COMMON CAUSE 1CCCV9464----DK1 1.00 CHECK VALVE OCC9464 RANDOMLY FAILS TO OPEN DS LOC 1.00 1/4 ARV OR 1/3 STM DMP - LOCAS

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1ACDPMCC1393AFC5 1.00 MCC 1393A FAILS 1ESRE171718R1FCC 1.00 DIV 17 RELAY R1 AND RELAY R2 AND DIY 18 RELAY R1 FAIL DUE TO 1ESRE171182--FCC 1.00 RELAY Call RCV/17-1 AND RCV/18-2 Fall COPMON CAUSE 1CCCV94638---DK1 1.00 CHECK VALVE 1CC9463B RANDOMLY FAILS TO OPEN-BSWPM1A29----XCC 1.00 PUMPS 1A & 28 FAIL TO RUN DUE TO CC BSWPM1A1B ---XCC 1.00 BSWPM010202--XCC 1.00 PUMPS 14,1B & 28 FAIL 10 RUN DUE TO CC BSWPM010201--xCC 1.00' PUMPS 1A, 1B & 2A FAIL TO RUN DUE TO CC 1ESCNTRIAS5&6UD1 1.00 TEST RELAY TRIAS/TR2 CONTACTS S&6 SPURIOUS'.Y CPEN A

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Page 14 September 10, 1993 1ESCNTRIASS&6UC7 1.00 TEST RELAY TRIAS1/TR1 CONTACTS 5&6 SPURIOUSLY OPEN 1ESCNTRIA25&6UE1 1.00 TEST RELAY TRIAM/TR2 CONTACTS 5&6 SPURIOUSLY OPEN 1ESCNTRIA23&4UE1 1.00 RELAY TRIAM/TR2 CONTACTS 3&4 SPURIOUSLY OPEN BESCN191817--FCC 1.00 DIVS 19,18 & 17 RELATS FAIL DURING OPERATION DUE TO CC 1ESCNTRIA15&6UE1 1.00 TEST RELAY TRIAM/TR1 CONTACTS S&6 SPUR!OUSLY OPEN BSWPM010102--XCC 1.00 PUMPS 1A, 2A & 28 Fall TO RUN DUE To CC 1ESCNTRIA13&4UE1 1.00 RELAY TRIAM/TR1 CONTACTS 3&4 SPUR 100 SLY OPEN BCCPS004-----FK1 1.00 FAllORE OF LOW DISCHARGE PRESSURE START SIGNAL BCCPMG40506--XCC 1.00 PUMPS 08, OC & 00 Fall TO RUN DUE TO CC BCCPM040506--ACC 1.00 PUMPS 08, OC & 00 FAIL TO START DUE TO CC BCCCV63B6463BDCC 1.00 CHECK VALVES 2CC94638,0CC9464 & 1CC94638 FAIL TO OPEN DUE CC 1ESCN501&2 --UC7 1.00 TEST SWITCH #50 CONTACTS 182 SPURIOUSLY DPEN 1ESCN453&4---UD1 1.00 TEST SWITCH #45 CONTACTS 3&4 SPURIOUSLY OPEN 25WPS003---- FR1 1.00 FAILURE OF LOW DISCHARGE PRESSURE START SIGNAL 1ESCN219E&F--UE1 1.00 RESET SWITCH #219 CONTACTS E&F SPURIOUSLY OPEN 1ACDPMCC1383AMK1 1.00 MCC 1383A IS UNAVAILABLE DUE TO MAINTENANCE 1ACCB14742474UCC 1.00 FD BREAKER 1474 AND 2474 TRANS-FER OPEN DUE TO COMMON CAUSE 2SWPM001-----xR1 1.00 SW PUMP 2A RANDOMLY FAILS TO CONTINUE TO RUN 1ESCN19TR17&80C5 1.00 TEST RELAY TR1/19 CONTACTS 7&8 SPURIOUSLY OPEN 1ACDPMcC1383AMC7' 1.00 P'* 1383A IS UNAVAILABLE DUE To MAINTENANCE 1ACCB14741494UCC 1.00 1474 AND 1494 TRANSFERS OPEN DUE TO A COMMON CAUSE 25WCV0001----DR1 1.00 cWEct VALVE 25W0001 RANDOMLY FAILS TO OPEN 1ESCN19SIXS&6KC5 1.00 DIV 9 RELAY SIX CONTACTS S&6 FAIL TO CLOSE ON DEMAND 1ACDPMCC1383AFK1 1.00 MCC 1383A FAILS 1ACBS149-----MC5 1.00 BUS 149 UNAVAILABLE DUE To MAINTENANCE 1ACDPMCC1383AFC7 1.00 MCC 1383A FAILS 1ESCN18TR1A560C7 1.00 TEST RELAY TR1A/18 CONTACTS 5&6 SPUR 100 SLY OPEN 2DGBS2LP0-9--FG5 1.00 LOCAL DC BUS IN DG 2A PANEL 2LP09 FAILS 2DCCBRF132 --UES 1.00 1ESCN18SIXS&6KC7 1.00 DIV 18 RELAY SlX CONTACTS 5&6 FAIL TO CLOSE ON DEMAND 1ACCB14741484UCC 1.00 CB 1474 AND 1484 TRANSFERS OPEN DUE TO A COMMON CAUSE 20CCBE114F112UCC 1.00 C8 El-14 AND F1-12 TRANSFER OPEN DUE TO COMMON CAUSE 2DCCB212C1---UE2 1.00 CIRCUlf BREAKER 212C1 FROM DC BUS 212 TRANSFERS OPEN 1ESCN1851X1&2KC7 1.00 DIV 18 RELAY SIX CONTACTS 1&2 FAIL TO CLOSE ON DEMAND 2DCCB212B1---UE2 1.00 CIRCUIT BREAKER 21281 FROM BATT 212 TRANSFERS OPEN 2DCCB211C2-*-UE2 1.00 CIRCUIT BREAKER 211C2 FROM DC BUS 211 TRANSFERS OPEN 2DCCB211C1---tE2 1.00 CIRCUIT BREAKER 211C1 FROM DC BUS 211 TRANSFERS OPEN 2DCCB011A1---UE3 1.00 CIRCUIT BREAKER 011A1 FROM BATT CHARGER 011 TRANSFERS OPEN 1ESCN18411&2-KC7 1.00 DIV 18 RELAY R1 CONTACTS 1&2 FAIL TO CLOSE ON DEMAND 2DCBY211212 -FCC 1.00 BATTERY 211 AND 212 FAIL DUE TO COMMON CAUSE 2DCBS248-----FCB 1.00 LOCAL DC BUS IN BtJS 248 FAILS 1ACBS149---- FCS 1.00 BUS 149 FAILS 2DCBC011 ----FE3 1.00 BATTERY CHARGER Oil FAILS 1ESCN17TR15&6001 1.00 TEST RELAY TR1/17 CONTACTS 5&6 SPURIOUSLY OPEN 1ESCN1751X3&4KD1 1.00 DIV 17 RELAY SIX CONTACTS 3&4 FAIL TO CLOSE ON DEMAND 1 ACDPMCCl372-FD1 1.00 MCC 1372 FAILS BSVPM020102--XCC 1.00 PUMPS 1B, 2A & 28 FAIL TO RUN DUE TO CC 1ESCN17SIX182KD1 1.00 Div 17 RELAY SIX CONTACTS 112 Fall TO CLOSE ON DEMAND

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Page 15 Septewber 10, 1993 4

2ACCB4718191-UCC 1.00 BREAKERS 2471, 2481, & 2491 TRANSF. OPEN DUE TO COMMON CAUSE 1ACDPMCC1371*MD1 1.00 MCC 1371 IS UNAVAILABLE DUE TO MAINTENANCE 2ACCB4243444-UCC 1.00 BREAKERS 2424, 2434, & 2444 TRANSF. OPEN DUE TO COMMON CAUSE FD. BREAKER 2491 To BUS 249 TRANSFERS OPEN 2ACCB2491-"-UC6

.1.00 BESRE1719 ~ ~ FCC 1.00 DIVS 17 & 19 RELAYS' FAIL DURING OPERATION DUE To CC 1ESCN17R2182-KD1 1.00 DIV 17 RELAY R2 CONTACTS 182 Fall TO CLOSE ON DEMAND 2ACCB2442-~-UD4 1.00' FD. BREAKER 2442 To BUS 244 TRANSFERS OPEN.

1ESCN17R11&2-KD1

.1.00 DIV 17 RELAY R1 CONTACTS 112 Fall TO CLOSE ON DEMAND 2ACCB2434 ~ ~ UD4 1.00

'FD. BREAKER 2434 TO BUS 248 TRANSFERS OPEN 2ACCB2432--~UD4 1.00 FD. BREAKER 2432 70 BUS 243 TRANSFERS OPEN y

1ESCN16C5&DS-0C5 1.00 TEST SWITCH #16 N T CONTACTS C5&D5 SPURIOUSLY OPEN 1ACDPMCC1371-FD1 1.0G MCC 1371 FAILS 1AC85148-----MC7 1.00 BUS 148 UNAVAILABLE DUE TO MAINTENAN 5 2ACBS248-~--QD4 1.00 2ACBS248-~--MD4 1.00 1ESCN15E11F110C7-1.00 TEST SWITCH #15 N-T CDNTACTS E11&F11 SPURIOUSLY OPEN 1ESCN14A5&B5 001 1.00 TEST SWITCH #14 N-T CONTACTS A5&B5 SPURIOUSLY OPEN

' 1VCPM007--"-XZZ-

".00 CHARGING PUMP 1B RANDOMLY FAILS TO RUN

' 1ESCN139E&F*-UE1 1.00' RESET SWITCH #139 CONTACTS EEF SPURIOUSLY OPEN 1VCPM006007-xcc 1.00 CHARGING PUMPS 1A AND 1B FAIL TO RUN DUE TO COMMON CAUSE 1ACBS148-~ --FC7 - 1.00 BUS 148 FAILS 1SWP5003 "---FR1 1.00

' FAILURE OF LCW DISCHARGE PRESSURE START SIGNAL 1SWPM001002-ACC.

1.00 PUMPS 1A & 18 Fall 10 biruii put 10 Lt.

t 1DGBS1LP07---FG6 1.00 LOCAL DC BUS IN DG 0 PANEL ILP07 FAILS 1DGBS1LP07-~ FG6 1.00

' LOCAL DC BUS IN DG 0 PANEL ILP07 FAILS 1DGBS1LP0-9--FD3 1.00 LOCAL DC BUS IN DG 1A PANEL 1LP09 FAILS 1DGBS18 - ~ ~FG2 1.00 LOCAL DC BUS IN DG 1B CONTROL PANEL FAILS 1AFMVFWOO5051*CC 1.00 FAILURE OF AFW MOV FWOO50 & 51 TO CLOSE DUE TO COMMON CAUSE 10CFU600AFUSEBE1 1.00 600 AMP FUSE IN TIE LINE FAILS 1SIPM004---~M15 1.00

$1 PUMP 1B UNAVAILABLE DUE TO MAINTENANCE

- 1ACC84A202C--UCC 1.00 CB 1374A,'1382D AND 1392C TRANS.FER OPEN DUE TO A COMMON CA 1ACBS147- ---MD1 1.00-BUS 147 UNAVAILABLE DUE TO MAINTENANCE BCCPS006----FK1 1.00.

FAILURE OF LOW DISCHARGE PRESSURE START SIGNAL' 1DCFU25-a-- BD5.

1.00 20 AMD FUSE 25 FROM DIST. CABINET BUS 113 FAILS 1ACCB484494--UCC 1.00 CB 1484 AND 1494 TRANSFER OPEN DUE TO A Com0N CAUSE 1SIPM003*---M15 1.00 51 PUMP 1A UNAVAILABLE DUE TO MAINTENANCE 1AFCVMS0007-DL2 1.00 CHECK VALVE 1MS0007 RANDOM FAILURE TO OPEN 1AFCVMS0006 -DL2 1.00 CHECK VALVE INS 0006 RANDOM FAILURE TO OPEN ISICV9012DCB-DCC 1.00 CHECK VALVES 1519012D, C, B Fall TO OPEN DUE TO COMMON CAUSE

' 1SWCV0001 ~~-DR1 1.00 CHECK VALVE 1SW0001 RANDOMLY FAILS TO OPEN

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1SICV9012DC-DCC 1.00

- CHECK VALVES 15190120, C FAIL TO OPEN DUE TO C0pM09 CAUSE 1SICV9012DB--DCC

~1.00 CHECK VALVES 1519012D, B Fall TO OPEN DUE TO COMMON CAUSE ISICV9012D --DZZ-1.00 CHECK VALVE ISI9012D Rt.NDONLY FAILS TO OPEN ISICV9012CD--DCC 1.00-CHECK VALVES 1519012C4 D FAIL TO OPEN DUE TO COMMON CAUSE 1SICV9012CB--DCC 1.00 CHECK VALVES 1519012C, B Fall TO OPEN DUE TO Carm04 CAUSE 1SICV9012C"-D2Z 1.00

. CHECK VALVE 1519012C RANDOMLY FAILS TO OPEN ISICV9012BD--DCC -

.1.00 CHECK VALVES 15190128, D FAIL TO OPEN DUE TO COMMON CAUSE 1DCCBF14-~~-UE1 1.00 FD BREAKER F1-4 FROM DC BUS.112 TRANSFERS OPEN b

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+

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Page 16 Septenber 10, 1993 1SICV9012BC--DCC 1.00 CHECK VALVES 15190128 C Fall TO OPEN DUE TO COMMON CAUSE 1SICV90129---DZZ 1.00 CHECK VALVE 15190128 RANDOMLY FAILS TO OPEN 10CCBF120--- UE1 1.00 FD BREAKER F1-20 FROM DC BUS 112 TRANSFERS OPEN 1SICV9012AD--DCC 1.00 CHECK VALVES 1519012A, D FAIL TO OPEN DUE TO COMMON CAUSE 151CV9012AC--DCC 1.00 CHECK VALVES 1SI9012A. C FAIL TO OPEN DUE TO COMMON CAUSE BCCPS005-----FK1 1.00 FAILURE OF LOW DISCHARGE PRESSURE START SIGNAL 1DCCBE120F120UCC 1.00 CB El-20 AND F1-20 TRANSFER OPEN DUE To COMMON CAUSE 1SICV9012AB -DCC 1.00 CHECK VALVES 1519012A, B Fall TO OPEN DUE TO COMMON CAUSE 1SICV9012A---DZ2 1.00 CHECK VALVE 1519012A RANDOMLY FAILS TO OPEN 1DCCBE120 - -UE1 1.00 FD P.REAKER E1-20 FROM DC BUS 111 TRANSFERS OPEN 1ACBS137-----FD1 1.00 480V ESF BUS 137 FAILS 10CCBC6E13F13UCC 1.00 CB F1-13, C1-6 AND El-13 TRANS OPEN DUE TO COMMON CAUSE IDCCBC18-----UE3 1.00 FD BREAKER C1-8 FROM DC BUS 011-1 TRANSFERS OPEN 1DCCBC16E113-UCC 1.00 C8 C1-6 AND El-13 TRANSFER OPEN DUE TO COMMON CAUSE 10CCaC12F14--UCC 1.00 FD BREAKER C1-2 AND F1-4 OPEN DUE TO COMMON CAUSE 1 AC85147 --- FD1 1.00 BUS 147 FAILS 1DCCBB1---+--UE1 1.00 CIRCUIT BREAKER 11281 FROM BATT CHARGER 112 TRANSFERS OPEN 1DCCB1A211282UCC 1.00 CB 011A2 AND 11282 TRANSFER OPEN DUE TO A CCMMON CAUSE IDCC81A1111B10CC 1.00 C8 011A1 AND 11181 TRANSFER OPEN DUE TO A COMMON CAUSE 1DCC818E12F12UCC 1.00 CB Cl-8, E1-20, AND F1-20 TRANS* FER OPEN DUE TO COMMON CAUS 1DCCB11811281UCC 1.00 C8 11181 AND 11281 TRANSFER OPEN DUE TO A COMMON CAUSE 1ACCB4718191-UCC 1.00 BREAKERS 1471, 1481, & 1491 TRANSF. OPEN DUE TO COMMON CAUSE BSWPMIC2C----XCC 1.00 1DCCB112C1---UE1 1.00 CIRCULI BREAKER 112C1 FROM DC BUS 112 T*ANSFERS OPEN ISICV89198---DZ2 1.00 CHECK VALVE 1SICV8919B RANDOMLY FAILS TO OPEN 1SICV8919A8--DCC 1.00 CHECK VALVES 1SICV8919A & B Fall DUE TO COMMON CAUSE 1SICV8919A- -DZZ 1.00 CHECK VALVE 1$1CV8919A RANDOMLY FAILS TO OPEN 1DCCB11282 --UE1 1.00 CIRCUIT BREAKER 11282 FROM BATT-ERY 112 TRANS FERS OPEN 1SICV8900CD--DCC 1.00 CHECK VALVES IS18900C, D FAIL TO OPEN DUE TO COMMON CAUSE 1DCC8111C1---UE1 1.00 CIRCUlf BREAKER 111C1 FROM DC BUS 111 TRANSFERS OPEN 1SICV890080--DCC 1.00 CHECK VALVES 15189008, D FAIL TO OPEN DUE TO COMMON CAUSE 1SICV8900BC--DCC 1.00 CHECK VALVES 15189008, C FAIL TO OPEN DUE TO COMMON CAUSE 1DCCB11181---UE1 1.00 CIRCUIT BREAKER 11181 FROM PATT CHARGER 111 TRANSFERS OPEN 1SICV8900AD -DCC 1.00 CHECK VALVES 1518900A, D FAIL TO OPEN DUE TO COMMON CAUSE 1SICV8900AC--DCC 1.00 CHECK VALVES 1SI5900A, C FAIL TO OPEN DUE TO COMMON CAUSE 1DCC8011101--UE3 1.00 CIRCUIT BREAKER 011101 FROM DC BUS 011-1 TRANSFERS OPEN 1SICV8900AB -DCC 1.00 CHECK VALVES 1518900A, 8 FAIL TO OPEN DUE TO COMMON CAUSE 1DCBY112112--ME1 1.00 BATTERY 112 AND CHARGER 112 ARE UNAVAILASLE DUE TO EQUALIZAT 1DCBY112-----FE1 1.00 BATTERY 112 FAILS 1DC8Y111112--FCC 1.00 BATTERY 111 AND 112 Fall DUE TO A COMMON CAUSE 1DCBY111---- FE1 1.00 BATTERY ill FAILS 1DC8YO11112--FCC 1.00 BATTERY 011 AND 112 Fall DUE TO A COMMON CAUSE 1DC8YO111112-FCC 1.00 BATTERY 011,111 AND 112 FAIL DUE TO COMMON CAUSE 1RVM018101E--XCC 1.00 FAN 18, 1D & 1E FAILS TO RUN IN LOW SPEED DUE TO CC 1RVM0181D1E -FCC-1.00 FANS 18, 10 & 1E Fall TO SWITCH TO L N SPEED DUE TO CC 1RVM018------FA5 1.00 18 FAN FAILS TO SWITCH TO LOW SPEED RANDOMLY 1ACC8471481--UCC 1.00 FD. BREAKER 1471 AND 1481 TRANS-FER OPEN DUE TO COMMON CAUS 1RVM01A1D1E--XCC 1.00 FAN 1A,1D & 1E FAILS TO RUN IN LOW SPEED DUE TO CC

~

Page 17 September 10, 1993

-1RvM01A101E--FCC 1.00 FANS 1A, 10 & 1E FAIL TO SWITCH TO LOW SPEED DUE TO CC 1DCBS149-----FC5 1.00 LOCAL DC BUS IN BUS 149 FAILS 1RVM01A191E--XCC 1.00 FAN 1A, 18 & 1E FAILS'TO RUN IN LOW SPEED DUE TO CC 1RVM01A181E--FCC 1.00 FANS 1A. 18 & 1E Fall TO SWITCH TO LOW SPEED DUE TO CC 1DCBS148---- FC7 1.00 LOCAL DC BUS IN BUS 148 FAILS 1RvMC1A181D1EXCC 1.00 FAN 1A,18,1D,1E FAILS TO RUN IN LOW SPEED DUE TO CC 1RvM01A18101EFCC 1.00 FANS 1A,1B,10,1E FAIL TO SWITCH TO LOW SPEED DUE TO CC 1DCBS147- ---FD3 1.00 LOCAL DC BUS IN BUS 147 FAILS 1RVM01A1810--XCC 1.00 FAN 1A, 1B & 1D FAILS TO RUN IN LOW SPEED DUE TO CC

+

1RVM01A181D-FCC 1.00 FANS 1A, 1B & 10 FAIL TO SWITCH TO LOW SPEED DUE TO CC 10CBS147-----FD1 1.00 LOCAL DC BUS IN BUS 147 FAILS 1RvM01A -----FA5

. 1.00 1A FAN FAILS TO SWITCH TO LOW SPEED RANDOMLY 1RVM01E------FAS 1.00 1L FAN FAILS TO SWITCH TO LOW SPEED RANDOMLY 10CBS142-----FD3 1.00 LOCAL DC BUS IN BUS 142 FAILS 1RvM01D- ----FA5 1.00 10 FAN FAILS TO SWITCH TO LOW SPEED RANDOMLY 1DCBS137--*--FD1 1.00 LOCAL DC BUS IN BUS 137 FAILS 2ACCB2444-- -UD4 1.00 FD. BREAKFR 2444 TO BUS 249 TRANSFERS OPEN 1ACBS144-----FD3 1.00 BUS 144 FAsis 2ACCB2451--- UC8 1.00 FD. BREAFTR 2481 TRANSFERS OPEN 1DCBS112-----FE1 1.00

-DC BUS 112 FAILS 1DCBC112---- FE1 1.00 BATTERY CHARGER 112 FAILS 1DCBC111112--FCC 1.00 BATTERV CHARGER 111 AND 112 FAIL DUE TO A COMMON CAUSE 1DCBC111-----FE1 1.00 BATTERT CHARGER 111 FAILS 1DCBC011111--FCC 1.00 BATTERY CHARGER 011 AND 111 Fall DUE TO COMMON CAUSE 1ACCB4243444-UCC 1.00 BREAKERS 1424, 1434, & 1444 TRANSF. OPEN DUE TO COMMON CAUSE 1MSSV0304----KCC 1.00 CCF OF STOP VALVES SVG003, SV0004 TO CLOSE 1MSSV0204----KCC 1.00

' CCF'STOP VALVES SV0002, SV0004 TO CLOSE 1ACCB1392C---UC5 1.00 CIRCUIT BREAKER 1392C FROM 450V ESF BUS 139 TRANSFERS OPEN 1ACBS143-----FD3 1.00 BUS 143 FAILS IMSSYO203----KCC 1.00 CCF OF STOP VALVES SY0002 & SV0003 TO CLOSE 1MSSV0103----KCC 1.00 CCF OF STOP VALVES SV0001 & SV0003 TO CLOSE 1MSSV0102----KCC 1.00

-- CCF OF STOP VALVES SV0001 & SV0002 TO CLOSE 1ACCB382D392CUCC 1.00 CB 1382D AND 1392C TRANSFER OPEN DUE TO A COMMON CAUSE 1CSMV002004--DCC 1.00 1MOV-CS0002 AND IMOV-CS0004 FAIL TO OPEN DUE TO CC 2DCBS211-----TE2 1.00 DC BUS 211 FAILS 1MSGV0304- --KCC 1.00 CCF OF GOV. VALVES GV0003, GV0004 TO CLOSE 1MSGV0204--- KCC 1.00 CCF OF COV. VALVES GV0002, GV0004 TO CLOSE 1ACCB3748373AUCC 1.00 CB 13748 AND 1373A TRANSFER OPEN DUE TO A COMMON CAUSE iMSGV0203-- -KCC 1.00 CCF OF GOV. VALVES Gv0002 & GV0003 To CLOSE IMSGV0104----KCC 1.00 CCF OF GOV. VALVES GV0001, GV0004 TO CLOSE 1MSGYO103----KCC 1.00 CCF OF GOV. VALVES GV0001 & GV0003 To CLOSE 1MSGv0102----KCC 1.00

- CCF OF GOV. VALVES GV0001 & GV0002 1CSCV0509013-DCC

.1.00 CHECK VALVES 5,9,13 FAIL TO OPEN DUE TO CC 1CSCV0507013-DCC 1.00 CHECK VALVES 5,7,13 Fall TO OPEN DUE TO CC

.1CSCV0507011-DCC 1.00 CHECK VALVES 5,7,11 Fall TO DPEN DUE TO CC 1ACCB374A382DUCC 1.00 CB 1374A AND 1382D TRANSFER OPEN DUE TO A COMMON CAUSE 1CSCv0501109-DCC 1.00 CHECK VALVES 5,11,9 FAIL TO DPEN DUE TO CC 1CSCV0309013 DCC 1.00-CHECK VALVES 3,9,13 FAIL TO OPEN DUE TO CC W.s gee e

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_4' Page 18 Septeter 10, 1993 1CSCV0307013-DCC 1.00 CHECK VALVES 3,7,13 FAIL TO OPEN DUE TO CC 3

1CSCV0307011-DCC.

1.00 CHECK VALVES 3,7,11 Fall TO OPEN DUE TO CC 20CCBF112- --UE2 1.00 FD BREAKER F1-12 FROM DC BUS 212 TRANSFERS OPEN 1ESTI1819fSI FCC 1.00 DIV 18 & 19 MECM CAM TIMER TSI FAILS DURING OP. DUE TO CC 1ESTI1719tSI-FCC -

1.00 Div 17 & 19 MECN CAM TIMER TSI FAILS DURING OP. DUE TO CC 1ESRE17R2--~ FD1 1.00 DIV 17 RELAT R2 FAILS DURING OPERATION 1ESCNTRIBS2340C5 1.00 TEST RELAY TRIBS2/TR1 CONTACTS 3&4 SPUR 10USLY OPEN 1ESCN19TR18340C5 1.00 TEST RELAT TR19/19 CONTACTS 3&4 SPURIOUSLY OPEN

- iESCN16G10H100C5 '

1.00 TEST SWITCH #16 N-TS CONTACTS G10&H10 SPURIOUSLY OPEN 1DCFU600A----BE1 1.00.

600 AMP FUSE IN TIE LINE FAILS 1DCFU225A ~~ BE3.

1.00 225 AMP FUSE IN TIE LINE FAILS 1SICV9012BCD-DCC:

1.00 CHECK VALVES 1S190128, C, D FAIL TO OPEN DUE TO COMMON CAUSE 1SICV9012ACD-DCC 1.00 CHECK VALVES 1SI9012A, C, D FAIL TO OPEN DUE To COMMON CAUSE' 1SICV9012ABD-DCC 1.00 CHECK VALVES 1519022A, B, D Fall TO OPEN DUE TO COMMON CAUSE 1SICV9012ABC-DCC 1.00'

' CHECK VALVES 1SI9012A, B, C FAIL TO OPEN DUE TO COMMON CAUSE 1DCBT111111-ME1 1.00' BATTERY 111 AND CHARGER 111 ARE UNAVAILABLE DUE TO EQUALIZAT

' 1DCBT011011--ME3 1.00-BATTER? *i1 AND CHARGER 011 ARE UNAVAILABLE DUE TO EQUALIZAT 1DCBS111----FE1 1.00 DC BUS til FAILS 1DCBS0111--- FE3' 1.00 DC BUS 011-1 FAILS 1CSxv0040---GJ5 1.00 COMPONENT FAULT IN SECMENT G: VALVE 1CS0040 LEFT OPEN 1CSPM0028----AJ5 1.00 CS PLMP CS002-1B FAILS TO START RANDOMLY 1CSPM0018 ~--MJ5 1.00 SEGMENT F (TRAIN B) UNAVAILABLE DUE TO MAINTENANCE 1CSMV004006--DCC 1.00 1MOV CS0004 AND 1MOV-C50006 FAIL TO OPEN DUE TO CC 1CSMv002006--DCC

.1.00 1MOV C50002 AND 1MOV-CS0006 FAIL TO OPEN DUE TO CC 1CSMV0005 ~~-TZZ' 1.00 COMP, FAULT'IN SEGMENT H: 1MOV-CS0005 & TRAIN B TEST UNAVAX 1ESRE17R218R1FCC 1.00 DIV 17 RELAY R2 AND DIV 18 RELAY R1 FAIL DUE TO COMMON CAUSE 1ESCN175tx5&6KD1 1.00 DIV 17 RELAY SIX CONTACTS S&6 Fall TO CLOSE ON DEMAND 1ESCN17R5112-KD1 1.00

- DIV 17 RELAT RS CONTACTS 182 FAIL TO CLOSE ON DEMAND 1ACCB1472-- KD1 1.00-FD. BRKR.1472 TO ESF BUS 147 FAILS TO CLOSE -

1SIPM003---- A15 1.00 SI PUMP 1A RANDOMLY; FAILS TO START 1MSAV181920- DCC 1.00 CCF TO OPEN OF ARY MS0018, MS0019 AND M50020 1MSAY171920*-DCC 1.00' CCF TO OPEN OF ARV MS0017, MS0019 AND MS0020 -

1MSAV171820--DCC

-1.00 CCF TO OPEN OF ARV M50017 MS0018 AND MS0020 1SICV8922AB--DCC' 1.00 CHECK VALVE IS!8922A AND B Fall TO OPEN DUE TO COMMON CAUSE 1SICV8922A---DZZL 1.00 CHECK VALVE 1SI5922A RANDOMLY FAILS TO OPEN 1CSPM01A018-ACC 1.00~

MOTOR DRIVEN PUMPS 1A AND 15 FAIL TO START DUE TO CC iMSAV0017----MZZ

'1.00 MAINTENANCE UNAVAILABILITY OF VALVE 1MOV-MS0017' 1ESTI18TSI--FC7 1.00:

DIV 18 MECMANICAL CAM TIMER TSI FAILS DURING OPERATION 1SICvv012ABCDDCC 1.00 CHECK VALVES 1SI9012A,B C,0 FAIL. TO OPEN DUE TO COMMON CAUSE

- 1MSMV0019~ --MZZ 1.00 MAINTENANCE UNAVAILABILITY OF VALVE MOV-MS0019 1MSMV0018----MCC 1.00 MAINTENANCE UNAVAILABILITY OF VALVE MOV MS0018

~

1MSAV019020--DCC

1.00 CCF TO OPEN OF ARY M50019 AND MS0020 1MSAv018020- DCC-1.00 CCF.TO OPEN OF ARV MS0018 AND MS0020.

1MSAV017020--DCC.

1.00 CCF TO OPEN OF ARY MS0017 AND MS0020

--1ES-HINICTPRFE1-1.00

. CONTAINMENT HIGM-MIGN PRESSURE SIGNAL FAILS 1ACCB1491 -- UC5 1.00~

FD. BREAKER-1491 TRANSFERS OPEN

' 1ESRE78R39R3BFCC _.

1.00=

DIV 17 & 18 R3 & DIV 19 R3B RELAY FAILS DURING OPER. DUE TO

- 1ESRE78R39R3AFCC 1.00 DIV 17 & 18 R31 DIV 19 R3A RELAT FAILS DURING OPER. DUE TO t

~. _ _. _ _ -. _ - _, _._,, _. _

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m Page 19

-s Septewber 10, 1993 1ACCB1481-~-UC7 1.00 FD. BREAKER 1481 TRANSFERS OPEN 1ACCB1444----UD3 1.00 FD. BREAKER 1444 TO BUS 149 TRANSFERS OPEN 1ACCB1434----UD3 1.00 FD. BREAKER 1434 TO BUS 148 TRANSFERS OPEN 1ACCB1432- --UD3 1.00 FD. BREAKER 1632 TO BUS 143 TRANSFERS OPEN ICSxV0043---GJ5 1.00 COMPONENT FAULT IN SEGMENT K: VALVE 1CS0043 LEFT OPEN 1MSAV171819200CC 1.00 CCF TO OPEN OF ARY MS0017, MS0018 MS0019 & MS0020 1ESRE19R39---FC5 1.00 DIV 19 RELAY R3B FAILS DURING OPERATION 1ESRE1983A~-FC5 1.00 DIV 19 RELAY R3A FAILS DURING OPERATION 1CSMV0004-- -DJ5 1.00 1MOV-CS0004 FAILS TO OPEN RANDOMLY 2DCBY011-----FE3 1.00 BATTERY 011 FAILS 1ESCN17TRIA56001 1.00 TEST RELAT TRfA/17 CONTACTS 5&6 SPURIOUSLY OPEN 1ESCN14E11F11001 1.00 TEST SWITCN 814 N-T CONTACTS E11&F11 SPURIOUSLY OPEN 1CSMV020406--DCC 1.00 1MOV-CS0002,-004 & -006 Fall TO OPEh DUE TO CC 1MSMV0020- --MZZ 1.00 MAINTENANCE UNAVAILABILITY OF VALVE MOV-MS0020 1EST!17189fSIFCC 1.00 DIV 17.18 & 19 MECN CAM TIMER TSI FAILS DURING OPER. DUE TO 1CSMv0007----TZZ 1.00 COMP. FAULT IN SEGMENT L 1MOV-CS0007 & TRAIN C TEST UNAVAI 1DCCB11192---UE1 1.00-CIRCUIT BREAKER 111B2 FROM BATT ERY 111 TRANS-FERS OPEN 1SIPM003004--ACC 1.00 51 PUMPS 1A AND 18 FAIL TO START DUE TO COMMON CAUSE IDCCB011A2~-UE3 1.00 CIRCUIT BREAKER 011A2 FROM BATT-ERY 011 TRANS-FERS OPEN 1RVM01C----~ xAS 1.00 1C FAN FAILS TO RUN IN LOW SPEED RANDOMLY 1ESTI19fSI---FC5 1.00 DIV 19 MECHANICAL CAM T!MER FAILS DURING OPERATION 1CSPM001C---MJ5 1.00-SEGMENT J (TRAIN C) UNAVAILABLE DUE TO MAINTENANCE ISICV8926----015 1.00 CHECK VALVE 1518926 RANDOMLY FAILS TO OPEN IN SEGMENT K 1CSMv0006- --DJ5 1.00 1MOV-CS0006 FAILS TO OPEN RANDOMLY 1ESRE17RS~--FD1 1.00 Div 17 RELAY R5 FAILS DURING OPERATION 1MSAv0020AM--DZZ 1.00 ARY MOV-MS0020 VALVE STICKS OR FAILS TO OPEN (FAULT IN VALVE 1CSPM003C- ~-AJS 1.00 CS PUMP CS003-1C FAILS TO START RANDOMLY TCSPM01A018 -XCC 1.00 MOTOR DRIVEN PUMPS 1A AND 19 Fall TO RUN DUE TO CC 1CSPM003C -~XJ5 1.00 CS PUMP CS003-1C FAILS TO RUN RANDOMLY 1CSPM0028-- -XJ5 1.00 CS PUMP CS002-1B FAILS TO RUN RANDOMLY 1RVM01C-----AAS 1.00 1C FAN FAILS To START IN LOW SPEED RANDOMLY 1SWMV0009-~-DZZ 1.00 OUTLET VALVE IMOV-SWOOO9 FAILS TO OPEN RANDOMLY 1RVPE003----MAS 1.00 SEGMENT C UNAVAILABLE DUE TO MAINTENANCE SLO _2

.000 CONSEQUENTIAL SMALL LOCA (WITN SW OR CCW)

LDCPRT1

.000 SUCCESS EVENTS 1NSGv020304--KCC

.000 CCF OF GOV. VALVES cv0002, Cv0003,cV0004 TO CLOSE

i b

f Septecher 10 ZION STATION Basic R. Achievement Description Coments System Event Worth 10CCBA2182282UCC 2.411E+04 Cs 011A2,11182 AND 11282 TRANS-FER OPEN DUE TO A COMMON CA Battery feed to DC bus DC2 1DCBYO1111112FCC 1.102E+04 BATTERY 011,111, AND 112 Fall DUE TO A COMMON CAUSE DC1 1DCCB1A211182UCC 2.449E+03 C5 011A2 AND 11152 TRANSFER OPEN DUE TO A COMMON CAUSE Battery 'eed to DC bus DC2 1DCCB18211282VCC 2.233E+03 CB 1MB2 AND 11282 TRANSFER OPEN DUE TO A COMMON CAUSE Battery feed to DC bus DC2 1RMCV8730AB--DCC 720.

CHECK VALVES 1RM8730A, 8 FAIL DUE TO COMMON CAUSE Ptep discharge chk. viv.

RN 1RHPM001002-ACC 720 RHR PUMPS 1A & 18 Fall TO START DUE TO COMMON CAUSE RM 1ESRE18R219R2FCC 720.

DIY 18 RELAY R2 AND DIV 19 RELAT R2 Fall DUE TO COMMON CAUSE ESTAS actuation of RNR pp.

RH 1RHMV610611-DCC 644 RMR MINIFLOW VALVES 1RHFCV610 & 1RMFCV611 FAIL DUE TO CC RM 1DGDG01A18---FCC 284.

DGs 0, 14, & 18 FAIL TO RUN DUE TO COMMON CAUSE DG 1ACC84718191-DCC 284 BREAKERS 1471, 1481,& 1491 Fall TO OPEN DUE To COMMON CAUSE Feed from service bus AP1 1ActB4738393-KCC 284 CBs 1473, 1483, & 1493 Fall TO CLOSE DUE TO Com 0N CAUSE D/G output bkr.

AP1 1DGDG01A18 --ACC 284 DGs 0,1A, & 18 FAIL TO START DUE TO COMMON CAUSE DG 1DCCBE113F113UCC 177.

CB E1*13 AND F1-13 TRANSFER OPEN DUE TO COMMON CAUSE DC feed bkr. to Bus 148, 149 DC2 1ACC8148414940CC 175.

CB 1484 AND 1494 TRANSFERS OPEN DUE TO A COMMON CAUSE Feed to 480V bus AP1 1ACCB383039580CC 175.

CB 1383D AND 13958 TRANSFER OPEN I,vc TO A COMMON CAUSE MCC feed AP2 1RMPM001002--XCC 174.

RHR PUMPS 1A & 1B FAIL TO RUN DUE TO COMMON CAUSE RN 1RNMVS700AB--KCC 174.

MOTOR OPERATED VALVE 1RM8700A & B Fall TO CLOSE, C CAUSE Suction f rore RWST, hot leg RM 1RHLS8700AB ~ FCC 174.

STEM MOUNTED LIMIT SWITCHES ON 1RH8700A, 8 FAIL DUE TO CC Interlock RM 1S1MV8811AB--DCC 174.

MOTOR OPERATED VALVE 1SI8811A & B Fall TO OPEN COMMON CAUSE Recire, step suction RM 1DC87011111-FCC 166.

BATTERT 011 AND 111 FAIL DUE TO A COMMON CAUSE DC1 1SICV8957AB-DCC 166.

CHECK VALVES 1518957A, 8 FAIL TO OPEN DUE TO COMMON CAUSE Cold leg injection chk. vlv.

RM 1SICV9002ABC-DCC 166.

CHECK VALVES 1519002A, B, C Fall TO OPEN DUE TO COMMON CAUSE Cold teg injection chk. vtv.

RN 1RHCV8958""DZZ 166.

CHECK VALVE 1518958 RANDOMLY FAILS TO OPEN RHR suction from RWST RM

- iSICV9001 ABC-DCC 166.

CHECK VALVES 1SI9001A, 8, C FAIL TO OPEN DUE TO COMMON CAUSE Cold leg injection chk. viv.

RN 1SICV9002ABCDDCC 90.0 CHECK VALVES 1519002A,8,C,0 Fall TO OPEN DUE TO COMMON CAUSE Cold leg injection chk. vtv.

RM 1SICV9002BCD-DCC 90.0 CHECK VALVES 15190028, C, D Fall TO OPEN DUE TO COMMON CAUSE Cold leg injection chk. viv.

RM 1SICV9002ABD-DCC 90.0 CHECK VALVES 1519002A, B, D FAIL 70 CPEN DUE TO COMMON CAUSE Cold leg injection chk. viv.

RN 1SICV9002ACD-DCC 90.0 CHECK VALVES 1519002A, C, D FAIL TO OPEN DUE TO COMMON CAUSE Cold leg injection chk. viv.

RH 1SICV9001ABCDDCC 89.9 CPECK VALVES 1519001A,8,C,0 Fall TO OPEN DUE TO COMMON CAUSE Cold leg injection chk. vtv.

RM 1SICV9001ACD DCC 89.9 CHECK VALVES 1519001A, C, D FAIL TO OPEN DUE TO COMMON CAUSE Cold leg injection chk. vtv.

RN 1SICV9001BCD-DCC 89.9 CHECK VALVES 1$190018, C, D FAIL TO OPEN DUE TO COMMON CAUSE Cold leg injection chk. viv.

RM 1SICV9001ABD-DCC 89.9 CHECK VALVES 1519001A, 8, D FAIL TO OPEN DUE TO COMMON CAUSE Cold leg injection chk. viv.

RM 1SICV9001AC--DCC 77.8 CHECK VALVES 1519001 A, C FAIL TO OPEN DUE TO COMMON CAUSE Cold leg injection chk. vtv.

RH 1SICV9002AC-DCC 77.8 CHECK VALVES 1519002A, C FAIL TO OPEN DUE TO COMMON CAUSE Cold leg injection chk. viv.

RH 1SICV9002BC--DCC 77.8 CHECK VALVES 1S190028, C FAIL TO OPEN DUE TO COMMON CAUSE Cold leg injection chk. viv.

RN 1SICV9001BC-DCC 77.8 CHECK VALVES 15190018, C Fall TO OPEN DUE TO COMMON CAUSE Cold leg injection chk. viv.

RM 151CY9002AB--DCC 77.7 CHECK VALVES 1519002A, B FAIL To OPEN DUE TO COMMON CAUSE Cold leg injection chk. vtv.

RN 151CV9001A8 -DCC 77.7 CHECK VALVES 1519001A, 8 Fall TO OPEN DOE TO COMMON CAUSE Cold leg injection chk. viv.

RM 1SICV8957A---DZZ 77.6 CHECK VALVE isl8957A RANDOMLY FAILS TO OPEN Cold leg injection chk. viv.

RM 1DGDG1 A1 B"-- FCC 75.2 DGs 1A AND 18 FAIL TO RUN DUE TO COMMON CAUSE DG 1ACCB481491"DCC 75.2 FD. BREAKER 1481 AND 1491 Fall TO OPEN DUE TO COMMON CAUSE Feed frors service bus API 1ACCB483493--KCC 75.2 CIRC. BR. 1483 AND 1493 FAIL TO CLOSE DUE TO COMMON CAUSE D/G output bkr.

AP1 1DGDG1A18 ~ ~ ACC 73.5 DGs 1A AND 18 FAIL TO START DUE TO COMMON CAUSE DG 1AFCV69686766DCC 52.6 COMMON CAUSE FAILURE OF CV 1FWOO69 AND 0068 AND 067 AND 066 AFW comon injection chk. viv.

AF 1AFAMSG1D "--DCC 51.9 SG 1D SAFETY VALVES (5) FAIL TO OPEN DUE TO COMMON CAUSE MS e-w w

e W

W 4e e

Ptg2 2 September 10, 1993 1AFAMSG1A" -DCC 51.9 SG 1A SAFETY VALVES (5) Fall TO OPEM DUE TO COMMON CAUSE MS 1AFAMSG18 - ~DCC 51.9 SG 18 SAFETY VALVES (5) F AIL TO OPEN DOC TO COMMON CAUSE MS 1AFAMSG1C---DCC 51.9 SG 1C SAFETY VALVES (5) Fall TO OPEN DUE TO COMMON CAUSE MS 1AFTKSC001-*-R01 49.1 FAULT PRIOR TO INPUT OF SEG. V CST 15C001 FAILS OR LARGE LEA CST SC BSWPM1A1828"ACC 44.3 PUMPS 1A, 1B & 2B Fall TO START DUE TO CC SW BESRE171819--FCC 38.0 DIVS 17, 18 & 19 RELATS Fall DUE TO CC ESFAS actuat. of SV pps. (R6)

SW j

BSWPM01020102xCC 17.2 PUMPS 1A,18, 2A & 2B Fall TO RUN INE TO CC SW j

1DGDG01A-- --FCC 17.1 DGs O AND 1A FAIL TO RUN DUE TO COMMON CAUSE DG l

1 ACCB473483--KCC 17.0 CIRC. BR. 1473 AND 1483 FAIL TO CLOSE DUE TO COMMON CAUSE D/G output breaker AP1 1ACCs471481--DCC 17.0 FD. BREAKER 1471 AND 1481 FAIL TO OPEN DOE TO COMMON CAUSE Feed from service bus AP1

)

1DGDG018-----FCC 15.5 DGs O AND 18 Fall TO RUN DUE TO COMMON CAUSE DG I

1ACCB473493--KCC 15.5 CIRC. BR. 1473 AND 1493 FAIL TO CLOSE DUE TO COMMON CAUSE D/G output breaker AP1 1ACCB471491-DCC 15.5 FD. BREAKER 1471 AND 1491 FAIL TO OPEN DUE TO COMMON CAUSE Service bus feed AP1 10GDG01A-----ACC 15.4 DGs O AND 1A FAIL TO START DUE TO CG9 MON CAUSE DG 1L0tOSGLV&OPACTN 14.0 FAILURE OF LO-LO SG LEVEL SIGNAL & OP. ACTION TO START PUMPS AFU actuation AF 1DGDG018-----ACC 13.8 DGs O AND 18 FAIL TO START DUE TO COMMON CAUSE DG BSWPM1A1528-xCC 13.5 PUMPS 14, 1B & 28 FAIL TO RUN DUE TO CC SW 1AFCVFWOO67-DAS 11.0 FAULT IN SEG. C CHECK VALVE 1FWOO67 FAILS TO OPEN AFW comrion injection chk. viv.

AF 1AFCVFWO % 9-DAS 11.0 FAULT IN SEG. A CHECK VALVE 1FWOO69 FAILS TO OPEN AFW cornmon injection chk. vtv.

AF 1AFCVFWOO68-DAS 11.0 FAULT IN SEG. 8 CHECK VALVE 1FWOO68 FAILS TO OPEN AFW conunon injection chk. viv.

AF 1AFCvFW0066-DAS 11.0 FAULT IN SEG. D CHECK VALVE 1FWOO66 FAILS TO OPEN AFU consnon injection chk. v(v.

AF 1ESSILOLO5GLVFC5 10.9 FAILURE OF ACTUATION SIGNAL LO-LO SG LEVEL AFU actuation AF 1AFCV000700060L2 10.6 COMMON CAUSE FAILURE TO OPEN CV 1MS0007 AND CV 1MS0006 Steam to TDAFW Pp.

AF 1AFPTFWOO4~-xt4 10.5 TD PUMP 1FWOO4 MECMANICAL FAILURE TO RUN Turbine-driven AFW AF 1AFCVFWOO31--DL4 10.4 CHECK VALVE 1FWOO31 FAILS TO OPEN TDAFW Pp. Discharge AF 1AFPTFWOO4---AL4 10.4 TD PUMP 1FWOO4 MECMANICAL FAILURE TO START Turbine-driven AFW AF 1AFAVMS0057--DL4 10.4 AIR-OP FLOW CNTRL 1FCV-MS57 FAILS TO OPEN DUE TO LOCAL FLT Steam to TDAFW Pp.

AF 1AFCV006967660CC 10.3 COMMON CAUSE FAILURE OF CV 1FWOO69 AND 0067 AND 0066 AFW consnon injection chk. Ylv.

AF 1AFCV00696867DCC 10.3 CONMON CAUSE FAILURE OF CV 1FWOO69 AND 0068 AND 0067 AFW contnon injection chk. viv.

AF 1AFCV00696866DCC 10.3 COMMON CAUSE FAILURE OF CV 1FWOO69 AND 0068 AND 0066 AFW cwinon injection chk. vtv.

AF 1AFCV006867660CC 10.3 COMMON CAUSE FAILURE OF CV 1FWOO68 AND 0067 AND 0066 AFW coninon injection chk. viv.

AF 1AFPTFWOO4-- ML4 10.3 TD PUMP 1FWOO4 UNAVAILABLE DUE TO MAINTENANCE Turbine-driven AFW AF 1AFCV006700660CC 9.17 COMMON CAUSE FAILURE OF CV 1FWOO67 AND 0066 AFW consnon injection chk. vlv.

AF 1AFCV006900680CC 9.17 COMMON CAUSE FAILURE OF CV 1FWOO69 AND 1FWOO68 AFW caninon injection chk. viv.

AF 1AFCV00690067DCC 9.17 COMMON CAUSE FAILURE OF CV 1FWOO69 AND 1FWOO67 AFW contnon injection chk. viv.

AF 1AFCV006800660CC 9.17 COMM0K CAUSE FAILURE OF CY 1FWOO68 AND 1FWOO66 AFW consnon injection chk. viv.

AF 1AFCV00680067DCC 9.17 COMMON CAUSE FAILURE OF CV 1FWOO68 AND 1FWOO67 AFW comon injection chk. vlv.

AF 1AFCV00690066DCC 9.17 COMMON CAUSE FAILURE OF CV 1FWOO69 AND 1FWOO66 AFW consnan injection chk. viv.

AF 1ACTR137139-QCC 8.82 4160-480V TRANS-FORMER 139 AND 137 FAIL DUE TO COMMON CAUSE 480V bus feed AP4 1ACTR139----MC5 8.63 4160-480V TRANS FORMER 139 !$ UNAVAILABLE DUE TO MAINTENANC 480V bus feed AP4 1DCCB16E13F130CC 5.22 CB CI-6, E1-13, AND F1-13 TRANS-FER OPEN DUE TO COMMON CAUS DC feed bkr. to Bus 147, 8, 9 DC2 1ACCB4B73A958UCC 7.95 CB 13748,1373A AND 13958 TRANS-FER OPEN DUE TO A COMMON CA MCC feed AP2 1SICV8900ACD-DCC 7.94 CHECK VALVES 15tB900A, C, O FAIL TO OPEN DUE TO COMMON CAUSE Chg. pp. cold leg injection SI ISICV8900ABD-DCC 7.94 CHECK VALVES 1 SIB 900A, B, O FAIL TO OPEN DUE TO COMMON CAUSE Chg. pp. cold teg injection SI 1SICV8900ABC-DCC 7.94 CHECK VALVES IS18900A, B, C FAIL TO OPEN DUE TO COMMON CAUSE Chg. pp. cold leg injection St ISICV8900BCD-DCC 7.94 CHECK VALVES 1518900B, C, D FAIL TO OPEN DUE TO Co m0N CAUSE Chg. pp. cold leg injection 51 1VCMvB801AB~DCC 7.94 MOTOR OPERATED VALVE IS18803A & B Fall TO OPEN COMMON CAUSE Chg. pp. cold (eg injection 1VCMVLCV112DEDCC 7.94 MOV VC LCV112D & E Fall TO OPEN DUE TO COMMON CAUSE Chg. pp. suction from RWST SI IVCCV9032 - -D22 7.93 CHECK VALVE 1S19032 RANDOMLY FAILS TO OPEN Chg. pp. cold leg injection SI 1YCCV8546--- DZZ 7.93 CHECK VALVE 1VC8546 RANDOMLY FAILS TO OPEN Chg. m. suction from RWST SI 1SICV8900ABCDDCC 7.93 CHECK VALVES 1518900A,B,C,D FAIL TO OPEN DUE TO COMMON CAUSE Chg. m. cold leg injection St 1ACCB373A395 BUCC 7.87 _

CB 1373A AND 13958 TRANSFER OPEN DUE TO A COMMON CAUSE MCC feed AP2

POge 3 September 10, 1993 1ACCB3748395 BUCC 7.87 CB 1374B AND 13958 TRANSFER OPEN DUE TO A COMMON CAUSE MCC feed AP2 1ACCB1494----UC5 7.58 CIRCUIT BREAKER 1494 FROM 4160V ESF BUS 149 TRANSFERS OPEN 480V bus feed AP1 1ACCB13958---UC5 7.10 CIRCUIT BREAKER 1395B FROM 480V ESF BUS 139 TRANSFERS OPEN MCC feed AP2 1RMPM001-----AMS 6.56 RHR PUMP 1A RANDOMLY FAILS TO START RN 1RMPM002----- AH7 6.49 R3R PUMP 1B RANDOMLY FAILS TO START RH 1ACTR139-----oC5 6.44 4160-480V TRANS-FORMER 139 FAILS 480V bus feed AP4 1ACTR137-----M01 5.92 4160-480V TRANS-FORMER 137 IS UNAVAILABLE DUE TO MAINTENANC 480V bus feed AP4 1ACTR137-----QD1-5.91 4160-480V TRANS-FORMER 137 FAILS 480V bus feed AP4 1 ACCB1373A---UDI 5.90 CIRCUlf BREAKER 1373A FROM 480V ESF BUS 137 TRANSFERS OPEN MCC feed AP2 1ACCB1474- - UD1 5.89 CIRCUIT BREAKER 1474 FROM 4160V ESF BUS 147 TRANSFERS OPEN 480V bus feed AP2 1ACCB434444--UCC 5.85 FD. BREAKER 1434 AND 1644 TRANS-FER OPEN DUE TO COMMON CAUS Feed from service bus AP1 BSWPM1828----XCC 5.83 PUMPS 1B & 28 Fall TO RUN DUE TO CC SW 1VCAVFCV121-VZZ 5.81 CHARGING PUMP FCV RANDOM FAIL. TO REMAIN DPEN FCV-VC-121 VC 1ACCB13748---UD1 5.80 CIRCUIT BREAKER 13748 FROM 480V ESF BUS 137 TRANSFERS OPEN MCC feed AP2

.IVCPM006-----XK4 5.79 CHARGING PUMP 1A FAILS TO RUN 18 HRS VC 1VCAvFCV0111AD2Z 5.79 AIR OPERATED VALVE FTO VC-FCV 0111A 2WST refitt VC 1VCAVFCV0111BDZZ.

5.79 MAKE-UP ISOL. VALVE TO VCT FTO (F.C.) FCV-VC-0111B RWST refitt VC 1VCAVFCV0110BDZZ 5.79 MAKE-UP ISOL. VALVE TO VCT FTO (F.C.) FCV-VC-01108 RWST refitt VC 1DCFU1CB3720ABE3 5.79 20A FUSE FROM DC DISTRIB. PANEL ICB37 FAILS OPEN DC feed to RWST refilt ADV's DC2 1DCFUICB3820ABD7 5.79 20A FUSE FROM DC DISTRIB. PANEL 1CB38 FAILS OPEN DC feed to RWST refitt ADV's DC2 1DCFU20 AMP---BE3 5.79 20 AMP FUSE FROM DC DISTRIBUTION PANEL 1CB37 FAILS DC feed to RWST refitt ADV's DC2 1VCFLO21--- -PZZ' 5.79 FILTER FAILS TO PASS COOLANT IN EMGY BORAT104 SYS SEGMENT L Boric acid filter VC 1VCPM006-----AK4 5.79 CHARGING PUMP 1A FAILS TO START VC 1VCAVFCV0110ADZZ 5.79 AIR OPERATED VALVE FTO VC-FCV-0110A RWST refill VC 1VCCV8440----DZZ 5.79 VCT DUTLET CHECK VALVE FTO VC-8440 RWST refit t VC 1VCKv8428-- -DZZ 5.79 MANUAL VALVE FTO VC-8428 Bldr. to VCT outlet (mistake)

VC 1VCXV8434----DZZ 5.79 MANUAL VALVE FTO VC 8434 RWST refitt VC 1VCXV8416- --DZZ 5.79 MANUAL VALVE FTO VC-8416 VCT intet (mistake)

VC 1VCCVB443----DZZ 5.79 CHECK VALVE FTO VC-8443 RWST refitt VC 1VCXV8281- --KZZ 5.79 MANUAL VALVE FTC VC-8281 RWST refill VC 1VCCVB433- --DZZ 5.79 CHECK VALVE FTO VC-8433 RWST refitt VC 1VCXV8432-- -DZZ 5.79 MANUAL VALVE FTO VC-8432 RWST refitt VC 1VCCVB429----DZZ 5.79 CHECK VALVE FTO VC-8429 RWST refitt VC 1VCMVLCV1128-DZZ 5.79 MOTOR OPERATED VALVE VC LCV1129 FAILS TO OPEN RWST refitt VC 1VCMVSIB8018-KZZ 5.79 MOTOR OPERATED VALVE 1518803B FAILS TO CLOSE RWST refitt, normal charging 51 1VCMVVC8106--DZZ 5.79 MOTOR OPERATED VALVE VC8106 FAILS TO OPEN RWST refill, normal charging VC 1VCMVLCv112C-DZZ 5.79 MOTOR OPERATED VALVE VC LCV112C FAILS TO OPEN RWST refitt, normal charging VC 1VCMVVC8105--DZZ 5.79 MOTOR OPERATED VALVE VC8105 FAILS TO OPEN RWST refitt, normal charging VC IVCMYLCV112E KZZ 5.79 MOV VC LCV112E RANDOMLY FAILS TO CLOSE RWST refitt, norwat charging St IVCMvtCV112D-KZZ 5.79 MOV VC LCV112D RANDOMLY FAILS TO CLOSE RWST refitt, normal charging 51 1VCMVSl8801A-KZZ 5.79 MOTOR OPERATED VALVE 1s!8803A FAILS TO CLOSE RWST refitt, normal charging SI 1DCCBRE17----UE1 5.76 FD BREAKER El-7 FROM DC BUS 111 TO 1CB38 TRANS-FERS OPEN DC feed to RWST refitt A0V's DC2 1DCCBC12-----UE3 5.76 FD BREAKER C1-2 FROM DC BUS 011 1 TRANSFERS OPEN DC feed to ESFAS slave relays DC2 1DCCB011C12--UE1 5.76 FD BR. C1-2 FROM DC BUS 011-1 TO PANEL 1CB37 TRANSFERS OPEN DC feed to RWST refitt A0V's DC2 ORT _ALL 5.67 OP ACTION - REFILL THE RWST-2 N/A N/A 1ACCB481491--UCC 5.45 FD. BREAKER 1481 AND 1491 TRANS-FER OPEN DUE TO COMMON CAUS Feed from service bus AP1 1DGDGI A-*---- AG4 4.74 DG 1 A FAILS TO START DN DEMAND DG 1D GDG1 A------X G4 4.72 DIESEL GENERATOR 1A FAILS TO RUN DG 1DGCB1483- --KC7 4.69 DG CIRC. BREAKER 1483 FAILS TO CLOSE ON DEMAND D/G output bkr.

AP1 1ACCB1481----DCT 4.69 MAIN FD. BREAKER 1481 FAILS TO OPEN ON DEMAND Feed from service bus AP1 1DGDG18------AG2 4.66 DG 1B FAILS TO START ON DEMAND DG 1DGDG18------XG2 4.64 DIESEL GENERATOR 18 FAILS TO RUN DG

+

Pcgn 4 Septenber 10, 1993 1DGtB1493---KC5 4.60 DG CIRC. BREAKER 1493 FAILS TO CLOSE ON DEMAND D/G output bkr.

AP1 1APCB1491~--DC5 4.60 MAIN FD. BREAKER 1491 FAILS To OPEN ON DEMAND Feed from service bus AP1 1APCN148-----NC7 4.53 DG AUTO START SIGNAL (BUS UV) NOT AVAILABLE AP1 1ACCN1483~--NC7 4.53 AUTO CLOSE SIG-NAL TO BREAKER 1483 CLOSE CIR-CUIT IS UNAVA D/G output bkr.

AM 1SWMV00160017GH3 4.47 DG HEAT EXCHAN-GER ISOL. VALVES NOT RESTORED AFTER TEST /MAI DG 1ACCN1493--"NC5 4.44 AUIO CLOSE SIG-NAL TO BREAKER 1493 CLOSE CIR-Cult 15 UNAVA D/G output bkr.

AP1 1ACCN149- ~-NC5 4.44 DG AUTO START SIGNAL (BUS UV) NOT AVAILABLE AP1 1RMCV8730A---DZZ 4.04 CHECK VALVE 1RH8730A RANDOMLY FAILS TO OPEN Pwp discharge chk. viv.

RM 1R MCV87308-~DZZ 4.04 CHECK VALVE 1RH8730B RANDOMLY FAILS TO OPEN Pwp discharge chk. viv.

RM 1ESRE18R2----FC7 4.03 DIV 18 RELAY R2 FAILS DURING OPERATION ESFAS actuation of RHR pp.

RM 1ESRE19R2~ ~FC5 4.03 DIV 19 RELAY R2 FAILS DURING OPERATION ESFAS actuation of RHR pp.

RN 1ESCN18TR15&60C7 4.02 TEST RELAY TR1/18 CONTACTS S&6 SPURIOUSLY OPEN ESFAS actuation of RHR pp.

RH 1ESCN15A5&B5-0C7 4.02 TEST SWITCH #15 N-T CONTACTS A5&B5 SPURIOUSLY OPEN ESFAS actuation of RNR pp.

RH 1ESCN197R15&60C5 4.02 TEST RELAY TR1/19 CONTACTS 5&6 SPUR 10USLY OPEN ESFAS actuation of RHR pp.

RH 1ESCN16A5&BS-0C5 4.02-TEST SWITCH #16 N-T CONTACTS A5&B5 SPURIOUSLY OPEN ESFAS actuation of RHR p.

RH 2ACCB483493~KCC 3.84 CIRC. BR. 2483 AND 2493 Fall TO CLOSE DUE TO COMMON CAUSE D/G output bkr.

AP1 2DGDG2A28---ACC 3.83 DGs 2A AND 2B FAIL TO START DUE TO COMMON CAUSE DG 2ACCB481491--DCC 3.83 FD. BREAKER 2481 AND 2491 Fall TO OPEN DUE TO COMMON CAUSE Feed from service bus AP) 1ESCN19R21&2-KC5 3.83 DIV 19 RELAY R2 CONTACTS 152 FAIL TO CLOSE ON DEMAND ESFAS actuation of RHR pp.

RM 1ESCN1951X3&4KC5 3.83 Div 19 RELAY SIX CONTACTS 3&4 Fall TO CLOSE ON DEMAND ESFAS actuation of RHR pp.

RM 1ESCN18SIX3&4KC7 3.83 DIV 18 RELAY SIX CONTACTS 3&4 FAIL TO CLOSE ON DEMAND ESFAS actuation of RHR pp.

RM 1ESCM18R21&2 KC7 3.83 Div 18 RELAY R2 CONTACTS 1&2 Fall TO CLOSE ON DEMAND ESFAS actuation of RHR pp.

RH 1RhPM001-~--XH5 3.74 RHR PUMP 1A FAILS TO RUN RM 1RHMVFCV611--DZZ 3.74 RHR MINIFLOW VALVE 1RMFCV611 FAILS TO OPEN RM 1RNMVFCV610 -DZZ 3.74 RHR MINIFLOW VALVE 1RMFCV610 FAILS TO OPEN RM 1RNMV8700A---KZZ 3.74 MOTOR OPERATED VALVE 1RH8700A FAILS TO CLOSE Suction from RWST, hot leg RM 1SINV8811A---DZZ 3.74 MOTOR OPERATED VALVE IS!8811A FAILS TO OPEN Rectre. stmp suction RM 1RMLS8700ASTMFZZ 3.74 STEM MOUNTED LIMif SWITCH ON 1RH8700A FAILS DURING OPERATION Interlock RH 1ACTR138 --- MC7 3.71 4160-480V TRANS-FORMER 138 IS UNAVAILABLE DUE TO MAINTENANC 480V bus feed AP4 1RHPM002----XHT 3.61 RHR PUMP 18 FAILS TO RUN RH 1RMLS8700BSTMFZZ 3.60 STEM-MOUNTED LIMIT SWITCH ON 1RH87003 FAILS DURING OPERAfl04 Interlock RM 1RHMv87008---KZZ 3.60 MOTOR OPERATED VALVE 1RH87008 FAILS TO CLOSE IN RHR SYS SEG Suction from RWST, hot leg RH ISIMV88118-~DZZ 3.60 MOTOR OPERATED VALVE 1S18811B RANDOMLY FAILS TO OPEN Recirc. strp suction RH 10GDG1A--~ ~ MG4 3.53 DIESEL GENERATOR 1A UNAVAILABLE DUE TO MAINTENANCE DG 1 D GD G1 B --- --- MG2 3.47 DIESEL GENERATOR 19 UNAVAILABLE DUE TO MAINTENANCE DG 2DGOG2A2B~ --XCC 3.35 DGs 2A AND 28 Fall TO RUN DUE TO COMMON CAUSE DG 1DCCBE113---UE1 3.24 '

FD BREAKER E1-13 FROM DC BUS 111 TRANSFERS OPEN DC feed to Bus 148 DC2 1DCCBF113--"UE1 3.24 FD BREAKER F1-13 FROM DC BUS 112 TRANSFERS OPEN DC feed to Bus 149 DC2 1RMPM002---- MMS 3.16 RHR PUMP 18 UNAVAILABLE DUE TO MAINTENANCE RM RH 1RMPM001-----MH5 3.16 RHR PUMP 1A UNAVAILABLE DUE TO MAINTENANCE DC2 1DCCBRE134---UE1 3.09 FD. BRKR. REl-34 FROM DC BUS 111 TRANSFERS OPEN DC feed to 1A d/g 1DCCBRF132-"UE1 3.D2 FD. BRKR. RFI-32 FROM DC BUS 112 TRANSFERS OPEN DC feed to 18 d/g DC2 BESRE1819----FCC 2.80 DIVS 18 & 19 RELAYS' FAIL DURING OPERAtl0N DUE TO CC ESFAS actuat. of SV pps. (R6)

SW BESRE1718----FCC 2.70 DIVS'17 & 18 RELAYS Fall DUE TO CC ESFAS actuat. of SW pps. (R6)

SW BSWPM182B- --ACC 2.66 PUMPS 1B & 28 FAIL TO START DUE TO CC Service water SW ZESRE2829R6--FCC 2.66 DIV 28 & 29 RELAYS FAIL DUR'NG OPERATION DUE TO CC ESFAS actuat. of SW pps. (R6)

SW 1ACCB1484----UC7 2.66 CIRCUlf BREAKER 1484 FROM 4160V ESF BUS 148 TRANSFERS OPEN 4LJV-bus feed AP2 1ACBS139- ---MC5 2.58 480V ESF BUS 139 15 UNAVAILABLE DUE TO MAINTENANCE AP2 1ACBS138-----MC7 2.44 480V ESF BUS 138 15 UNAVAILABLE DUE TO MAINTENANCE AP2 ORE _SB0 2.29 OP ACTION - RESTORE ECUIP& SUPPORT SYSTEMS N/A N/A XCC S24 2.29 CORE UNCOVERED PRIOR TO POWER RECOVERY AT 24 HRS (SEALLOCA)

N/A N/A 1ACCB13830---UC7 2.17 circuli BREAKER 13830 FROM 480V ESF BUS 138 TRANSFERS OPEN AP2

F Page 5 Septenber 10, 1993 1SICVS957B--DZZ 1.98 CHECK VALVE 1S15957B RANDOMLY FAILS TO OPEN Cold leg injection chk. viv.

RN 1DGDGO~---~ XG6 1.94 DIESEL GENERATOR 0 FAILS TO RUN DG 1D GDGo-- --- AG6 1.92 DG 0 FAILS TO START ON DEMAND DG 1RCAVPCV455C-DCC 1.89 COMMON CAUSE FAILURE OF PORVS PCV-455C AND PCV-456 RC 1ACDPMcC1393CMK1 1.86 MCC 1393C IS UNAVAILABLE DUE TO MAINTENANCE AP3 1ACDPMCC1383BMK1 1.86 MCC 1383B IS UNAVAILABLE DUE TO MAINTENANCE AP3 1DGCB1473----rD1 1.85 DG CIRC. BREAKER 1473 FAILS TO CLOSE ON DEMAND D/G output bkr.

API 1ACCB1471---DD1 1.85 MAIN FD. BREAKER 1471 FAILS TO OPEN 04 DEMAND Feed frora x vice bus AP1 2DCCB182212B10CC 1.72 CB 21182 AND 21281 TRANSFER OPEN DUE TO A COMMON CAUSE Battery feed to DC bus DC2 BSWPMIC2C----ACC 1.72 PUMPS 1C & 2C FAIL TO START DUE TO CC Service water SW 1SICV9002AD--DCC 1.69 CHECK VALVES 1519002A, O FAIL TO OPEN DUE TO COMMON CAUSE Cold leg injection chk. vlv.

RM 15tCV9002BD--DCC 1.69 CHECK VALVES 1519002B, D FAIL TO OPEN DUE TO COMMON CAUSE Cold leg injection chk. viv.

RN 1SICV9001AD--DCC 1.69 CHECK VALVES 1519001A, D FAIL TO OPEN DUE TO COMMON CAUSE Cold leg injection chk. viv.

RM 1SICV9001BD--DCC 1.69 CHECK VALVES 15190018, D FAIL TO OPEN DUE TO COMMON CAUSE Cold leg injection chk. viv.

RN 1ACCN147-----ND1 1.69 DG AUTO START SIGNAL (BUS UV) NOT AVAILABLE AP1 1ACCN1473-+--ND1 1.69 AUTO CLOSE SIG-NAL TO BREAKER 1473 CLOSE CIR-CUIT IS UNAVA D/G output bkr.

AP1 1AFMVTHROTLCCDCC 1.65 AFW THROTTLE VALVES (8) FAIL DUE To COMMON CAUSE AF 1AFOPACTION -HZZ 1.65 OPERATOR FAILS TO OPEN AFW THROTTLE VALVES N/A N/A BCCPM003007-XCC 1.64 PUMPS DA & OE Fall TO CONTINUE TO RUN DUE TO CC Convenent cooling CC 1ACBS139---~FC5 1.64 480V ESF BUS 139 FAILS AP2 1AFAMSG18305-DCC 1.64 SG 18 SAFETY VALVES (3/5) FTO DUE TO C.C.

(10 PAIRS)

MS 1AFAMSG1D305-DCC 1.64 SG 10 SAFETY VALVES (3/5) FTO DUE TO C.C.

(10 PAIRS)

MS 1AFAMSG1C305-DCC 1.64 SG 1C SAFETY VALVES (3/5) FTO DUE TO C.C.

(10 PAIRS)

MS 1AFAMSG1A305-DCC 1.64 SG 1A SAFETY VALVES (3/5) FTO DUE TO C.C.

(10 PAIRS)

MS 1AFAMSG1A505-DCC 1.64 SG 1A SAFETY VALVES (5/5) FTO DUE TO C.C MS 1AFAMSG18405-DCC 1.64 SG 18 SAFETY VALVES (4/5) FTO DUE TO C.C.

(5 PAIRS)

MS 1AFAMSG10505-DCC 1.M SG 1D SAFETY VALVES (5/5) FTO DUE TO C.C MS 1AFAMSG1D405-DCC 1.64 SG ID SAFETY VALVES (4/5) FTO DUE TO C.C.

(5 PAIRS)

MS 1AFAMSG1C505-DCC 1.64 SG 1C SAFETY VALVES (5/5) FTO DUE TO C.C MS 1AFAMSG1C405-DCC 1.64 SG 1C SAFETY VALVES (4/5) FTO DUE To C.C.

(5 PAIRS)

MS 1AFAMSG1B505-DCC 1.64 SG 18 SAFETY VALVES (5/5) FTO DUE TO C.C PS 1AFAMSG1A405-DCC 1.64 SG 1A SAFETY VALVES (4/5) FTO DUE TO C.C.

(5 PAIRS)

MS 1AFAMSG1B205-DCC 1.64 SG 18 SAFETY VALVES (2/5) FTO DUE TO C.C.

(10 PAIRS)

MS 1AFAMSG1A205-DCC 1.64 SG 1A SAFETY VALVES (2/5) FTO DUE TO C.C.

(10 PAIRS)

MS 1AFAMSG10205-DCC 1.64 SG 1D SAFETY VALVES (2/5) FTO DUE TO C.C.

(10 PAIRS)

MS 1AFAMSG1C205-DCC 1.64 SG 1C SAFETY VALVES (2/5) FTO DUE To C.C.

(10 PAIRS)

MS ISICV90028--DZZ 1.62 CHECK VALVE 1519002B RANDOMLY FAILS TO OPEN Cold leg injection chk. viv.

RN ISICV90018---DZZ 1.62 CHECK VALVE 1519001B RANDOtLY FAILS TO OPEN Cold leg injection chk. viv.

RH 1SICV9002A-~DZZ 1.62 CHECK VALVE 1519002A RANDOMLY FAILS TO OPEN Cold leg injection chk. viv.

RM 1SICV9001A---DZ2 1.62 CHECK VALVE 1519001A RANDOMLY FAILS TO OPEN Cold leg injection chk. viv.

RN 1DGDGO ------MG6 1.59 DIESEL GENERATOR O UNAVAILABLE DUE TO MAINTENANCE DG 1SICV9002CD-DCC 1.58 CHECK VALVES 1519002C, D FAIL TO CPEN DUE TO COMMON CAUSE Cold leg injection chk. viv.

RN 1SICV9001CD--DCC 1.58 CHECK VALVES 1SI9001C, D FAIL TO OPEN DUE To COMMON CAUSE Cold leg injection chk. viv.

RN 1ACTR138139"QCC 1.57 4160-480V TRANS* FORMERS 138, 139 FAIL DUE TO COMMON CAUSE AP4 1AFCV003200330CC 1.54 COMMON CAUSE FAILURE CV 1FWOO32 AND 1FWOO33 PDAFW pp. disch chk. viv.

AF BSWCV1121---DCC 1.54 CHECK VALVES 1SWOOO1 & 2SV0001 Fall TO OPEN DUE TO CC SW 1ESRE19171718FCC 1.53 DIV 19 RELAv R1, DIV 17 RELAY R1 & R2 & Otv 18 RELAY R1 FAIL ESFAS actuation of chg. p.

VC 1SICV9001C---DZZ 1.52 CHECK VALVE 1st9001C RANDOMLY FAILS TO OPEN Cold leg injection chk. viv.

RH 1ACTR138-----0C7 1.51 4160-480V TRANS-FORMER 138 FAILS AP4 OESRE29R828R8FCC 1.51 DIVS 29 & 28 RELAYS FAIL DURING OPERAfl0N DUE TO CC ESFAS actuation of CC pp.

CC 2DGDG2A28--XCC 1.50 DGs 2A AND 2B FAIL TO RUN DUE TO COMMON CAUSE DG 1ACCB1383A --UC7 1.49 CIRCUIT BREAKER 1383A FROM 480V ESF BUS 138 TRANSFERS OPEN l

4

~

• Page 6'

.S Septenber 10 S993 1ACCst393A aUC5:

1.49 CIRCUIT BREAKER 1393A FROM 480V ESF SUS 139 TRANSFERS OPEN 1CCMV94128---DZZ

. 1.49 CCW VALVE 1CC94128 TO RHR MX 18 FAILS TO OPEN 1CCMV9412A-~0ZZ 1.49 CCW VALVE 1CC9412A TO RHR HX 1A FAILS TO OPEN 1CCMV9412AB--DCC 1.48 MOVS 1CC9412A,8 FAIL TO OPEN DUE TO COMMON CAUSE 1ACDPMCC1391-FC5 1.48 MCC 1391 FAILS 1ACBS138-~ ~ FC7 1.48 480V ESF BUS 138 FAILS 1ACDPMcC13818FC7 -- 1.48 MCC 13818 FAILS 1AFPM005006--ACC 1.45 COMMON CAUSE FAILURE TO START MDPS 1FW005 AND 1FWOO6 BACTRSAT242~HZZ-1.44

. COMMON CAUSE FAILURE TO RUN MDPS 1FWOO5 AND 1FWOO6 1AFPM005006--XCC 1.45-OPERATOR FAILS TO RESTORE DEAD ESF BUS VIA THE SAT 242 TIE 2ACC82412 ~'- KD4 1.43 FD. BRKR. 2412 FROM BUS 241 FAILS TO CLOSE 1ACDPMCC1391-MC5. - 1.43

- MCC 1391 IS UNAVAILABLE DUE'TO MAINTENANCE 1ACDPMCC1381BMC7'

-1.43 MCC 13818 IS UNAVAILABLE DUE TO MAINTENANCE 1ACC8471491--UCC-1.40

- FD. BREAKER 1471 AND 1491 TRANS--FER OPEN DUE TO COMMON CAUS 1ACCB383A393AUCC - 1.40 CB 1383A AND 13934 TRANSFER OPEN DUE TO A COMMON CAUSE 1ACC8424444--UCC_

1.40 FD. BREAKER 1424 AND 1444 TRANS-FER OPEN DUE TO COMMON CAUS 1RHCV9002C---DZZ -

1.40 CHECK VALVE 1SI9002C RANDOMLY FAILS TO OPEN 10CC8RFI23- -UE1' 1.36 '

FD BREAKER RFI-23 FROM DC BUS 112 TRANSFERS OPEN 1DCCBC16~ +--UE3

- 1.36

' FD BREAKER C1-6 FROM DC BUS 011-1 TRANSFERS OPEN 1ACTR134-----003 1.36 4160-480V TRANS-FORMER 134 FAILS 1SFFLSTRAINERPZZ - 1.36 SPENT FUEL PIT PUMP SUCTION PIPING STRAINER (AT TANK) PLUGS 1SFFLOO6---~PZZ-1.36 SPENT FUEL PIT FILTER PLUGS SF-006 1SFXV8762A/8-KCC 1.36 COMMON CAUSE FAILURE OF SF-87628 AND SF8762A 1SFPM003-----XZZ 1.36 SPENT FUEL PIT PUMP RANDOM FTR 1SF-0003-1SIXY8927----DZZ 1.36 RWST-U1 BLOCK VALVE (N.C.) FTO 151-8927-2SIXY8927----DZZ

't.36 RWST-U2 BLOCK VALVE (N.C.) FTO 251-8927 1SFXV8758--~ DZZ 1.36 RWST-U1 REFU. WTR PUR. PUMP BLOCK VALVE N.C. FTO' 1SF-87 1SIXVB931--- DZZ 1.36 MANUAL BLOCK VLV TO RWSL FTO SI-8931

+

1SFXV8788----DZZ

. 1.36 MANUAL ISOLATION VALVE SPENT FUEL PIT FLOW TO RWST FTO SF-87 1SFXV8774----DZZ-1.36 SPENT FUEL FLTR BLOCK VLV FTO SF-8774 1SFXV8765- --KZS-1.36 SPENT FUEL PUMP PIT RETURN BLOCK VALVE FTC 1SF8765 ISFCv8766 ~--DZZ 1.36 SPENT FUEL PIT FLOW TO RUST CHK YLV FTO SF-8766 2SFXV8758--~DZZ.

1.36 RWST-U2 REFU. WTR PUR. PUMP BLOCK VLV (N.C.) FTO 2SF-87 1SFCV8793----DZZ

- 1.36 SPENT FUEL PIT PUMP DISCMARGE CHECK VALVE FTO SF-8793

- 1SFPM003-----AZZ 1.36 SPENT FUEL PIT PUMP RANDOM FTS ISF-003 1ACTR134-----M03 1.36 -

4160-480V TRANS-FORMER 134 IS UNAVAILA8tE DUE TO MAINTENANC 1ACC81443 ~*-UD3 1.361

- CIRCUIT BREAKER 1443 FROM 480V BUS 144 TRANSFERS OPEN 1ACC81341----UD3 -

1.36 FD. BREAKER 1341 To Bus 134 TRANSFERS OPEN.

1ACC81442--- UD3 1.33 FD. BREAKER 1642 TO BUS 144 TRANSFERS OPEN 1SWPM001-----AR1 1.33

. SW PudP 1A RANDOMLY FAILS TO START 1ACBS147---- FCS. 1.32 -

BUS 147 FAILS '

- TESRED19D1SR7XCC 1.29 RELAT RT DIV 19 & DIV 18 FAILS DURING OPER. DUE TO COMMON CA 2D60G2A------XG5 1.29 DIESEL GENERATOR 2A FAILS TO RUN.

' 10CCBF117----UE1 1.29 FD. BRKR. F1-17 FROM DC BUS 112 TRANSFERS OPEN.

2DGDG2A----~AG5-1.29 DG 2A FAILS TO START ON DEMAND OES$0SSDSEQ28FC6 1.29

. SAFE SHUTDOWN SEQUENCER 28 FAILS '

1

. 1AC85147-----MC5 1.29 BUS 147 UNAVAILABLE DUE TO MAINTENANCE

2DGC82483----KC8 -

1.28 DG CIRC. BREAKER 2483 FAILS TO CLOSE ON DEMAND 2ACC82481----DC8 1.28 MAIN FD. 8REAKER 2481 FAILS TO OPEN ON DEMAND

~ 1SWPM002-~--AR1-1.26-SW PUMP 18 RANDOMLY FAILS TO START 2ACTR242-**--QXX 1.26 OUTPUT FROM SYSTEM AUXILIARY TRANSFORMER 242 FAILS lRTKFACTORs

- 1.25 FACTOR USED IN RTK, LOC HAND CALC L

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. Page 7 Septen6er 10,1993 1ESRE17R6---FD1 1.25 Div 17 RELAY R6 RANDOMLY FAILS DURING OPERATION -

1SIMV8804AB--DCC

-1.25 MOTOR OPERATED VALVE ISIB804A & B FAIL TO OPEN DUE TO C. CAU 25 WPM 002----AR1 1.25 SW PUMP 28 RANDONLY FAILS TO START 2DGDG2A- ---MGS

-1.24 DIESEL GENERATOR 2A UNAVAILABLE DUE TO MAINTENANCE 1ESRE18R6- - FD1 1.24 DIV 18 RELAY R6 RANDOMLY FAILS DURING OPERATION ISWPM003 - --MR1 1.23 SW PUMP 1C (ISWOO3) UNAVAILABLE DUE TO MAINTENANCE 1ACCB14821492KCC 1.22 FD. BRKR. 1482 & 1492 Fall To CLOSE DUE:TO CupMON CAUSE 1DCCBC116----UE3 1.22

- FD. BRKR. C1-16 FROM DC BUS 011-1 TRANSFERS OPEN 2ESRE28R6---FD1 1.21 DIV 28 RELAY R6 RANDOMLY FAILS DURING OPERATION 2DGDG29------xG3 1.21

. DIESEL' GENERATOR 28 FAILS TO RUN 2DGDG28------AG3 1.21 DG 2B FAILS TO START ON DEMAND DES $QSSUEQ29FC6 1.21 SAFE SHtFDOWN SEQUENCER 29 FAILS 1SWPM002----xR1 1.21 SW PUMP 18 RANDOMLY FAILS TO CONTINUE TO RUN t

2DGCB2493----KC6 1.20 DG CIRC. BREAKER 2493 FAILS TO CLOSE ON DEMAND 2ACCB2491----DC6' 1.20 MAIN FD. BREAKER 2491 FAILS TO OPEN ON DEMAND-ISWPM003-----AR1 1.20 SW PUMP 1C RANDOMLY FAILS TO START 151MV8811AB--DCC 1.19 MOTOR OPERATED VALVE 1 SIB 811A & B FAIL TO OPEN COMMON CAUSE 1ACCB1424----UD3 1.19 FD. BREAKER 1424 TO BUS 147 TRANSFERS OPEN 1ACCB1422-~-UD3 1.19 FD.' BREAGA 1422 TO BUS 142 TRANSFERS OPEN (GIVEN CLOSED) 1ACCB1422----KD3 1.18 CIRCulf BREAKER 1422 FAILS To CLOSE AUTOMAT-ICALLY 1ACCB1421---DD3 1.18 CIRCUIT BREAKER 1421 FAILS TO OPEN AUTOMAT-ICALLY 1ACCBUATSAT--ND3 1.18 AUTO BUS TRANSFER SIGNAL IS UNAVAILABLE 1ACCB1471----UC5 1.17 FD. BREAKER 1471 TO BUS 147 TRANSFERS OPEN g

1SWPM001--+-xR1 1.17.

SW PUMP 1A RAMDOMLY FAILS TO CONTINUE TO RUN 1ACCB4748494-UCC 1.17-CB 1474,1L84 AND 1494 TRANS-FERS OPEN DUE TO A COMMON CAUS 2DGDG28------MG3 1.17' DIESEL GENERATOR 2B UNAVAILABLE DUE TO MAINTENANCE 2SWPM003 ----MR1 1.16 SW PUMP 2C (2SWOO3) UNAVAILABLE DUE TO MAINTENANCE 1ACDPMCC1393CFC5 1.16

'MCC 1393C FAILS 1ACDPMCC1393AFD1.

1.16 MCC 13934 FAILS 1ACBS142-+---FD3 1.16 BUS.142 FA!LS' 2$ WPM 003-----AR1 1.15 SW PUMP 2C RANDOMLY FAILS TO START 1ACDPMCC1372 MD1 1.14 MCC 1372 IS UNAVAILABLE DUE TO MAINTENANCE 1ACDPMCC1393 CMC 5 -

1.14 MCC 1393C IS UNAVAILABLE DUE TO Matt.!ENh1E

' 1ACDPMCC1393AMD1 1.*4 MCC 1393A 15 UNAVAILABLE DUE TO MAIN)EN C CE 1ACBS137-----MD1 1.14 480V ESF BUS 137 IS UNAVAILABLE DUE TO MAINTENANCE '

1ESRE171819R5FCC

~1.14 DIV 17,18 & ' 19 RELAY R5 FAILS DURING OPERATION DUE.TO CC 1ESRE19R6---FD1 1.13'

'DIV 19 RELAY R6 RANDOMLY FAILS DURING OPERAft0N 25 WPM 002-----XR1 1.13 SW PUMP 25 RANDOMLY FAILS TO CONTINUE TO RUN 2ACC8481491--UCC 1.12 FD. BREAKER 2481 AND 2491 TRANS-FER OPEN DUE TO COPW90N CAUS 2ACCB434444--UCC 1.12 FD. BREAKER 2434 AND 2444 TRANS-FER OPEN DUE TO COMMON CAUS 1SICV9002D---DZZ 1.12 CHECK VALVE ISI9002D RANDOMLY FAILS TO OPEN 1SICV9002C--DZZ 1.12

. CHECK VALVE ISI9002C RANDOMLY FAILS TO OPEN 1SICV9001D--DZZ

.1.12 CHECK VALVE 1519001D RANDOMLY. FAILS TO OPEN 2ESRf29R6- --FD1 1.12-DIV 29 RELAY R6 RANDOMLY FAILS DURING OPERATION-1 ESC::TRIBS3&40D1

-1.12 TEST RELAT TRiBS/TR1 CONTACTS 3&4 SPUR 100 SLY OPEN 1ESCN17TR1758001 1.12

- TEST RELAY TR1/17 CONTACTS 7&S SPURIOUSLY OPEN 1ESCN14C4&D4-001

~1.12 TEST SWITCM #14 N-T CONTACTS C4&D4 SPURIOUSLY OPEN

' 1ESRE17R3----F01 1.12-DIV 17 RELAY R3 FAILS DURING OPERATION 1CSMV0003 a--TZZ 1.12 COMP. FAULT IN SEGMENT D: 1MOV-CS0003 & TRAIN A TCST UNAVAl TCSPM001A----AJ5 1.12 CS PUMP CS001-1A FAILS 70 START RANDOMLY

'1CSPM001A----MJ5

't.12 SEGMENT B (TRAIN A) UNAVAILABLE DUE TO MAINTENANCE 1CSxv0037----GJ5 1.12, COMPONENT FAULT IN SEGMENT C: VALVE'1CS0037 LEFT OPEN 1

~

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Page 8 Septenber 10, 1993 1ESil17TSI--FD1 1.12 DIV 17 MECHANICAL CAM TIMER TSI F AILS DURING OF ' MON 1CSCV0005---DJ5 1.11 CHECK YALVE 1CS0005 FAILS TO OPEN RANDOMLY 1CSCV0003- --DJ5 1.11 CNECK VALVE 1CS0003 FAILS TO OPEN RANDOMLY 1ACCB14728292KCC 1.11 FD. BRKR. 1472 & 1482 & 1492 FAIL TO CLOSE DUE TO COMMON CAU 1CSMV0002----DJ5 1.11 1MOV-CS0002 FAILS TO OPEN RANDOMLY 1ESCN18TSD2ABKC7 1.11 DIV 18 TIMER TSO CONTACTS 2A&28 FAIL TO CLOSE ON DEMAND 1ESCN17R33&4-KD1 1.11 DIV 17 RELAY R3 CONTACTS 3&& FAIL TO CLOSE ON DEMAND 1ESCN17R31&2 KD1 1.11 DIV 17 RELAY R3 CONTACTS 182 FAIL TO CLOSE ON DEMAND 1ESCN18R6112-KC7 1.11 DIV 18 RELAY R6 CONTACTS 1&2 FAIL TO CLOSE ON DEMAND 1CSPM0014- - XJ5 1.10 CS PUMP CS001-1A FAILS TO RUN RANDOMLY 1AFPMFWOO6---AL4 1.08 MOTOR-DRIVEN PUMP 1FWOO6 RANDOM FAILURE TO START 1AFPMFWOO6 --XL4 1.08 MOTOR-DRIVEN PUMP 1FWOO6 RANDOM FAILURE TO RUN 1AFPMFV005---AL4 1.07 MOTOR-DRIVEN PUMP 1FWOO5 RANDOM FAILURE TO START 1AFPMFWOOS---XL4 1.07 MOTOR-DRIVEN PUMP 1FV005 RANDCM FAILURE TO RUN 1AFCVFWOO33--DL4 1.07 CHECK VALVE 1FWOO33 FAILS TO OPEN OESRE17RT---FD1 1.07 DIV 17 RELAY R7 RANDOMLY FAILS DURING OPEkATION BCCPM007-----AK1 1.07 PUMP OE RANDOMLY FAILS TO START 2DCC321182---UE2 1.07 CIRCUlf BREAKER 21182 FROM BATT-ERY 211 TRANSFERS OPEN 2DCCBE114---UE2 1.07 FD BREAKER El-16 FROM DC BUS 211 TRANSFERS OPEN 2DCCBRE134-- UE7 1.07 FD. BRKR. REl-34 FROM DC BUS 211 TRANSFERS OPEN 2DCBY211---- FE2 1.07 BATTERY 211 FAILS 1SWPM003--- XR1 1.07 SW PUMP 1C RANDOMLY FAILS TO RUN 1AFCVFWOO32--DL4 1.07 CHECK VALVE 1FWOO32 FAILS TO OPEN BCCPM007- - ~ xt1 1.07 PUMP OE RANDOMLY FAILS TO RUN 1SWCV11-----DR1 1.07 CHECK VALVE 1SW0001 RANDOMLY FAILS TO OPEN ISIPM003004-xCC 1.06 St PUMPS 1A AND 18 FAIL TO RUN DUE TO COMMON CAUSE

^

1ESRE18R7----FC7 1.06 DIV 18 RELAY R7 FAILS DURING OPERATION 25 WPM 003 ----XR1 1.06 SW PUMP 2C RANDOMLY FAILS TO RUN 1ESRE19R7---FC5 1.06 DIV 19 RELAY R7 FAILS DURING OPERATION 1ESCN19R71112KC5 1.05 DIV 19 RELAY R7 CONTACTS 11&12 FAIL To CLOSE ON DEMAND 1 ESC 419TSD3ABKC5 1.05 DIV 19 TIMER TSD CONTACTS 3A&38 FAIL TO CLOSE ON DEMAND 1ESCN18TSD3ABKC7 1.05 Div 18 TIMER TSO CONTACTS 3A&38 Fall TO CLOSE ON DEMAND 1ESCN18RT182-KC7 1.05 DIV 18 RELAY R7 CONTACTS 182 Fall TO CLOSE ON DEMAND 1MSAV171819--DCC 1.05 CCF TO OPEN OF ARY MS0017, MS0018 AND MS0019 25WCV21- ---DR1 1.05 CHECK VALVE 25W0001 RANDOMLY FAILS TO OPEN DESRE29R8-- FC6 1.05 DIV 29 RELAY R8 RANDOMLY FAILS DURING OPERATION 2CCPM003----AK1 1.05 PUNP OA RANDOMLY FAILS TO START IFPCVFP0002-DZZ 1.05 RANDOM FAILURE OF CHECK VALVE FP0002 TO OPEN IFPxVH24-----M2Z 1.04 MAINTENANCE UNAVAILABILITY OF FIRE PLUG VALVE H-24 2CCPM003-- --xK1 1.04 PUMP OA RANDOMLY FAILS TO CONTINUE TO RUN DEC LSC 1.04 OP ACTION - FIREWATER TO CCP OIL COOLER 1FPiVH24---DZZ 1.04 RAND 0M FAILURE OF FIRE PLUG VALVE AT COLUMN N 24 TO OPEN 1FPPD0007----MZZ 1.04 DIESEL DRIVEN PUMP FP0007 MAINTENANCE UNAVAILABILITY 1CCxv9485AB-FCC 1.04 COMMON CAUSE FAILURE OF ISOL. VALVES FOR CCW TO CHG. PUMPS 1CCXV358367-DCC.

1.04 CCF OF VALVES 0358, 0367 TO OPEN 1CCxv358362--DCC 1.04 CCF OF VALVES 0358, 0362 TO OPEN 1CCXV355367--0CC 1.04 CCF OF VALVES 0355, 0367 TO OPEN 1CCxv355362--DCC 1.04 CCF OF VALVES 0355, 0362 TO OPEN IFPP*0007- --XZ2 1.04 DIESEL DRIVEN PUMP FP0007 FAILS TO RUN 1FPF90007----A22 1.04 DIESEL DRIVEN PUMP FP0007 FAILS 70 siART 1ESCN19fSD2A9KC5 1.04 1ESCN19R6182-KC5 1.04

~

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Page 9 Septerte? 10, 1993 2EstN28R6182-KC8 1.04 2ESCN28TSD2ABKC8 1.04 OPWPM002- --XZZ

- 1.04 PRIMARY WATER MAKE-UP PUMP 08 RANDOM FTR OPWOO2 OPWPM002---*-MZZ 1.04 PRIMARY WATER PUMP 08 UNAVAILABLE DUE TO MAINTENANCE 1MSXXMS218FK-DCC 1.04 COMMON CAUSE FAILURE OF SDV 1PCV MS218,MS21F MS21K

- 1MSAV018019--DCC 1.03 CCF TO OPEN OF ARY M50018 AND MS0019 iMSAV017019-*DCC 1.03 CCF TO OPEN OF ARV MS0017 AND MS0019 1MSAV017018-DCC 1.03 CCF TO OPEN OF ARY MS0017 AND MS0018 1AFPMFWOO6 -ML4 1.03 MDP 1FWOO6 UNAVAILABLE DUE TO MAINTENANCE 1AFPMFW005---ML4 1.03 MDP 1FWOO5 UNAVAILABLE DUE TO MAINTENANCE IVCPM023-----XZZ 1.03

- B A TRANSFER PUMP 1A RANDOMLY FAILS TO RUN 2DCBY212-----FE2 1.03 BATTERY 212 FAILS 1DCFU14----*BE1 1.03 15 AMP FUSE 14 FROM DISTR CAB. BUS 114 FAILS 1SIMV88048-- DZZ 1.03 MOTOR OPERATED VALVE'1 SIB 8048 RANDOMLY FAILS TO OPEN s

15tMV8804A---DZZ-1.03 MOTOR OPERATED YALVE 15188044 FAILS TO OPEN IN SEGMENT NR ECCPM004 - --MK1-1.03 PUMP 08 UNAVAILABLE DUE TO MAINTENANCE 2ESCN29fSD2ABKC6 1.03 2ESCN29R61&2-KC6 1.03 2CCPM004- " AK1 1.03 PUMP 08 RANDOMLY FAILS TO STARI DESRE28RS----FC8 1.03 DIV 28 RELAY RB RANDOMLY FAILS DURING OPERATION 1MSXXMS21F21KDZZ 1.03 COMMON CAUSE FAILURE OF SDV 1PCV-MS21F AND 1PCV-MS21K 1MSXXMS21821KDCC 1.03 COMMcN CAUSE FAILURE OF SDV 1PCV-MS218 AND iPCV-MS21K 1MSXXMS21821FDCC 1.03 COMMON CAUSE FAILURE OF SDV 1PCV-MS218 AND iPCV-MS21F 1MSCCMS218---FZZ 1.02 CONTROL CIRCulf FAILURE FOR STEAM DUMP VALVES 2CCPM004----XK1 1.02 PUMP OB RANDOMLY FAILS TO RUN

.1SWFLD04---- PR1 1.02 SW STRAINER 1A RANDOMLY FAILS (PLUGS) 1SWFLOOS ----PRt.

1.02 SW STRAINER 1B RANDOMLY FAILS (PLUGS) 1MSPMMS218-- FZ2 1.02 CIRCULATING WATER PUMP FAILURE IVCPM0006---XK2 1.02 FAILURE OF CHARGING PUMP 1A TO CONTINUE RUNNING 2ACCB2422*---KD4 1.02 CIRCUIT BREAKER 2422 FAILS TO CLOSE AUTOMAT-ICALLY 2ACCB2421---DD4 1.02 CIRCUIT BREAKER 2421 FAILS M OPEN AUTOMAT-ICALLY OPWPM001---- XZZ 1.02-PRIMARY WATER MAKE-UP PUMP OA RAP 00M FTR OPW-001 2CCCV94638---DK1 1.02-CHECK VALVE 2CC94638 RANDOMLY FAlts TO OPEN 20CBT212- ---FE5

- 1.01 BATTERY 212 RANDOMLY FAILS 1ESCNSIX4A182KE1 1.01 NO SIGNAL TO 1MOV-518801A, SIX4-A CTS 18822 FTC ON DEMAND.

l[

1ESCNSIX4A2&6KE1 1.01 40 SIGNAL TO 1LCV-VC112D, SIX4-A CTS 286 FTC 04 DEMAND 1ESCNSIX48256KE1 1.01

- NO SIGNAL TO 1LCV-VC112E, SIX4-8 CTS 2&6 FTC ON DEMAND 1ESCNSIX4B182KE1 1.01 NO SIGNAL TO 1MOV-518801Bi SIX4-B CTS 18822 FTC ON DEMAND

- IVCPM024-----XZZ 1.01 B A TRANSFER PUMP 1B RANDOMLY FAILS TO RUN 1VCPM024----MZZ 1.01 B A TRANSFER PUMP 18 UNAVAIL-ABLE DUE TO MAINTENANCE TVCPM024--+-*AZZ 1.01 B A TRANSFER PUMP FAILS TO START (NIGN SPEED)

TAFMVFWOO56"DZZ 1.01 MOTOR OPERATED VALVE FWOOS6 RANDOMLY FAILS TO OPEN 1AFMVFW0054*-DZZ 1.01 MOTOR ODERATED VALVE FW0054 RANDOMLY FAILS TO OPEN 1AFMYFWOO52--DZZ 1.01 MOTOR UPERATED VALVE FWOO52 RANDOMLY. FAILS TO OPEN 1AFMVFWOO50--DZZ ~

1.01 MOTOR OPERATED VALVE FWOO50 RANDOMLY FAILS TO OPEN TVCMyLCV112E DZZ 1.01 MOV VC LCV112E RANDOMLY FAILS TO OPEN' 1VCMV88018 - DZZ 1.01 MOTOR OPERATED VALVE 15188018 FAILS TO OPEN 1VCMVLCV1120-DZZ 1.01 MOV-VC-112D RANDOMLY FAILS TO OPEN IVCMv8801A --DZZ 1.01 MCTOR OPERATED VALVE 1 SIB 801A FAILS TO OPEN 1AFMVFWOO57--DZZ-1.01 MOTOR OPERATED VALVE FWOO57 RANDOMLY FAILS TO OPEN

- 1AFMVFWOO55 -DZZ 1.01 MOTOR OPERATED VALVE FW0055 RANDOMLY FAILS TO OPEN 1AFMVFWOO53 -DZZ-1.01 MOTOR OPERATED VALVE FWOO53 RANDOMLY FAILS TO OPEN

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Page 10 September 10, 1993.

1AFMVFWOO51--DZ7 1.01 ATOR OPERATED VALVE FW0051 RANDOMLY FAILS TO OPEN IVCxv8432----KZZ 1.01 ISOLATION VALVE BLENDER TO RWST FTC VC-8432 1VCxv8434----KZZ 1.01 BLOCK VALVE BLENDER TO RWST FTC VC-8434 1SIPM004 ----X17 1.00 St PUMP 18 FAILS TO RUN 1SIPM003---*-X15 1.00 St PUMP 1A FAILS TO RUN 1MSSV020304--KCC 1.00 CCF OF STOP VALVES SV0002, SV0003,SV0004 TO CLOSE 1MSSV0104- --KCC 1.00 CCF OF STOP VALVES SV0001, SV0004 TO CLOSE 1MSSV010304--KCC 1.00 CCF OF STOP VALVES SV0001, SV0003,SV0004 TO CLOSE 1MSSV010204--KCC 1.00 CCF 0F STOP VALVES SV0001,SV0002 SV0004 TO CLOSE 1MSSY010203--KCC 1.00 CCF OF STOP VALVES SV0001, SV002 Sv0003 To CLOSE 1MSGV010304--KCC 1.00 CCF OF GOV. VALVES GV0001,. GV0003,GV0004 1MSGV010204--KCC 1.00 CCF OF GOV. VALVES GY0001, GV0002,GV0004 TO CLOSE 1MSGV010203-KCC 1.00 CCF OF GOV. VALVES GV0001,GV0002 GV0003 TO CLOSE IMSSV01020304KCC 1.00 CCF OF STOP VALVES SV0001, SV0002,SY0003 & SY0004 TO CLOSE 1MSGV01020304KCC 1.00 CCF OF GOV. VALVES GV0001, GV0002,GV0003, GV0004 TO CLOSE 1RCAVPCV456--DZZ 1.00 RANDON FAILURE OF PORY PCV-456 TO OPEN 1RCAVPCv455C-DZZ 1.00 RANDOM FAILURE OF PORV PCV-455C TO OPEN 1RCMVRC8000B-CZZ 1.00 PORY FLOW PATH INOPERABLE DUE 10 BLOCK VALVE RC800CB CLOSURE 1RCMVRC8000A-CZZ 1.00 PORY FLOW FATH INOPERABLE DUE TO BLOCK VALVE RC8000A CLOSURE 1AFRVMS0032--DZZ 1.00 SG 19 SAFETY VALVE 1MS0032 RANDOMLY FAILS TO OPEN 1AFRVMS0031--DZZ 1.00 SG 18 SAFETY VALVE 1MS0031 RANDOMLY FAILS TO OPEN 1 AF RVMS0029--DZZ 1.00 SG 18 SAFETY VALVE 1M50029 RANDOMLY FAILS TO OPEN 1AFRVMS0026--DZZ 1.00 SG 1D SAFETY VALVE 1M50026 RANDOMLY FAILS TO OPEN 1AFRVMS0024--DZZ 1.00 SG 10 SAFETY VALVE IMS0024 RANDOMLY FAILS TO OPEN 1AFRYMS0023--DZZ 1.00 SG IC SAFETY VALVE 1MS0023 RANDOMLY FAILS TO OPEN 1AFRVMS0022--DZZ 1.00 SG iC SAFETY VALVE 1MS0022 RANDOMLY FAILS TO OPEN 1AFRVMS0021--DZZ 1.00 SG 1C SAFETY VALVE 1MS0021 RANDOMLY FAILS TO OPEN 1AFRVMS0020--DZZ 1.00 SG IC SAFETY VALVE 1MS0020 RANDOMLY FAILS TO OPEN 1AFRvMS0019--DZZ 1.00 SG 1C SAFETY VALVE 1MS0019 RANDOMLY FAILS TO OPEN 1AFRVMSC017--DZZ 1.00 SG 1A SAFETY VALVE 1MS0017 RANDOMLY FAILS TO OPEN 1AFRVMSB016--DZZ 1.00 SG 1A SAFETY VALVE 1MS0016 RANDOMLY FAILS TO OPEN 1 AFRVM*,0015--DZZ 1.00 SG 1A SAFETY YALVE 1MS0015 RANDOMLY FAILS TO OPCN 1AFRV'v50030--DZZ 1.00 SG 1B SAFETY VALVE 1MS0030 RANDOMLY FAILS TO OPEN 1AFRVMS0027--DZZ 1.00 SG 1D SAFETY VALVE 1MS0027 RANDOMLY FAILS TO OPEN 1AFRVMS0033--DZZ 1.00 SG 18 SAFETY VALVE 1MS0033 RANDOMLY FAILS TO OPEN 1AFRVMS0028--DZZ 1.00 SG 10 SAFETY VALVE 1MS0028 RANDOMLY FAILS TO OPEN 1AFRVMS0025--DZZ 1.00 SG 1D SAFETf VALVE 1MS0025 RANDOMLY FAILS TO OPEN 1AFRVMS0014 -DZZ 1.00 SG 1A SAFETY VALVE 1MS0014 RANDOMLY FAILS TO OPEN 1AFRVMS0018--DZZ 1.00 SG 1A SAFETY YALVE 1MS0018 RANDOMLY FAILS TO OPEN PL_ATW 1.00 POWER LEVEL GREATER THAN 60 PERCENT 1ESRE17R1----FD1 1.00 Div 17 RELAY R1 FAILS DURING OPERATION 1VCPM006-"--XZZ 1.00 CHARGING PUMP 1A RAND (ELY FAILS TO RUN 1VCPM007-- --xK4 1.00 CHARGING PUMP 18 FAILS TO RUN IVCPM007---- MK4 1.00 CHARGING PUMP 1B UNAVAILABLE DUE TO MAINTENANCE IVCCV8481A---DZZ 1.00 CHECK VALVE IVC 8481A RANDOMLY FAILS TO OPEN TVCPM007-----AK4 1.00 CHARGING PUMP 1B FAILS TO START 1ESCN17TR13&4001 1.00 TEST RELAY TR1/17 CONTACTS 3&4 SPUR 100$LY OPEN 1ESCN18TR13&40C7 1.00 TEST RELAY TR1/18 CONTACTS 3&4 SPURIOUSLY OPEN 1ESCN15A118110C7 1.00 TEST SWITCH #15 N-T CONTACTS A11&B11 SPURIOUSLY OPEN 1ESCN1&A11811001 1.00 TEST SWITCH #14 N-1 CONTACTS A11&B11 SPURIOUSLY OPEN 1MSAvMS21K---DZZ 1.00 SC VALVE 1PCPMS21K RANDOM FAILURE TO OPEN 1MSAVMS21F---DZZ 1.00 53 VALVE iPCV-MS21F RANDOM FAILURE TO OPEN

45 X

Pcge 11

' Septw ber 10, 1993 1MSAVMS218-"DZZ 1.00 SD VALVE 1PCV-MS218 RANDOM FAILURE TO OPEN e

~ 1AFMyFWOO51 -KA2 1.00

- FAILURE OF ATW MOV FWOO51 TO CLOSE DUE TO HARDWARE.

1AFMVFWOO50 -KB2 1.00 FAILURE OF AFW MOV FWOO50 TO CLOSE DUE TO HARDWARE

- ICSCVGv9-----KZZ 1.00 ;

RANDOM FAILURE OF CHECK VALVE CS00910 CLOSE -

1CSCV005-----K22 1.00 RANDOM FAILURE OF CHECK VALVE CS005 TO CLOSE 1CSCV0013--~ KZZ 1.00 -

RANDOM FAILURE OF CHECK VALVE CS0013 TO CLOSE 1MSSV0004--- s'ZZ '

1.00 RANDOM FAILURE TO CLOSE STOP VALVE 4

- 1MSSV0003----KZZ, ' 1.00.

- RANDOM FAILURE TO CLOSE STOP VALVE 3 1MSSV0002-~-KZZ 1.00 RANDOM FAILURE TO CLOSE STOP VALVE 2 1MSSv0001----KZZ 1.00'

- RANDOM FAILURE TO CLOSE STOP VALVE 1' 1MSGV0004- -KZZ 1.00 RANDOM FAILURE TO CLOSE GOV. VALVE 4 1MSGV0003----KZZ 1.00-RANDOM FAILURE TO CLOSE GOV. VALVE 3 1MSGV0002----KZZ 1.00 RANDOM FAILURE TO CLOSE GOV. VALVE 2 1MSGV0001--- KZZ 1.00 RANDOM FAILURE TO CLOSE GOV. VALVE 1

' 1SIPM004 ---A17~

1.00 St PUMP 1B RANDOMLY FAILS TO START 1WDAV17A17B--KCC 1.00 CCF OF FCV-WD17A AND FCV-WD17B TO CLOSE 1CCPM007~---xK1 1.00 PUMP DE RANDOMLY FAILS TO CONTINUE TO RUN 1SICV89228---DZZ 1.00 '

CHECK VALVE 15189228 RANDOMLY FAILS TO OPEN 1ESRE18R1----FC7 1.00 DIV 18 RELAY R1 FAILS DURING OPERATION 1MSAV0019AM--DZZ,

1.00' ARY MOV-MS0019 VALVE STICKS OR FAILS TO OPEN (FAULT IN VALVE 1MSAV0018AM-DZZ 1.00 ARY MOV-MS0018 VALVE STICKS OR FAILS TO OPEN (FAULT IN VALVE 1MSAV0017AM--DZZ 1.00 ARV MOV-MS0017 VALVE STICKS OR FAILS TO OPEN (FAULT IN VALVE 1ESHEPHASE-A-HB1 1.00

- OPERATOR FAILS TO MANUALLY INITIATE PHASE A ISOLATION 25WFL005~---PRI 1.00 SW STRAINER 28 FAILS RANDOMLY (PLUGS)-

- 25WFLOO4- ---PRI 1.00 SW STRAINER 2A RANDOMLY FAILS (PLUGS) 1SFxv87628 ~-KZZ 1.00 SPENT FUEL PIT HEAT EXCHANGER OUTLET BLOCK VLV FTC SF-87628

?

1SFxV8762A --KZZ 1.00 SPENT FUEL Pif HEAT EXCHANGER INLET BLOCK VLV FTC SF-8762A 1ACCB1492~--KC5- - 1.00 FD. BRKR. 1492 to ESF BUS 149 FAILS TO CLOSE

-1ACCB1482 ~ KC7 1.00-FD. BRKR. 1482 TO ESF BUS 148 FAILS TO CLOSE BSWHTSTBTMANLHB1 1.00 FAILURE TO PLACE UNAFFECTED UNIT IN HOT SMTDN PER AOP 4.2 ICCXV9485B---KZZ RANDOM FAILURE TO CLOSE VALVE CC-94858 1CCXV9485A ~ KZZ

1.00 t.00

- RANDOM FAILURE OF VALVE CC-9485A. FAILS TO CLOSE 1CCXY0367---DZZ

- 1.00 RANDOM FAILURE TO OPEN DRAIN ISOL. VALVE CC0367 1CCXV0362-~-DZZ 1.00 RANDOM FAILURE TO OPEN DRAIN ISOL. VALVE CC0362 1Ctxv0358 ~--DZZ 1.00-

- RANDOM FAILURE TO OPEN DRAIN ISOL. VALVE CC0358

- 1CCxV0355----DZZ 1.00 ~

RANDOM FAILURE TO OPEN DRAIN ISOL. VALVE CC0355 MF ATW 1.00 FRACTION OF TRANSIENTS MAIN FEED UNAVAIL UNTIL TURBINE TRIP 1SIMY8807B --DZZ 1.00-MOTOR OPERATED VALVE 15188078 FAILS TO OPEN

~ 1CCXV9485B ~-MZZ 1.00 MAINTENANCE UNAVAILABILTY OF VALVE CC-94858

.1CCxv0367--"MZZ 1.00 MAINTENANCE UNAVAILABILITY OF WALVE CC0367 1CCxv0362 - ~ MZZ ' 1.00

- MAINTENANCE UNAVAILABILITY OF VALVE CC0362-1CCXV0358----MZZ 1.00 MAINTENANCE UNAVAILABILITY OF VALVE CC0358 1CCxv0355 - *-MZZ 1.00' MAINTENANCE UNAVAILABILITY OF VALVE CC0355 1CCPM006-----AK1 1.00 PUMP OD RANDOMLY FAILS TO STARTS I

1CCPM005-----AK1 1.00' PUMP OC RANDOMLY FAILS TO START 15!CV89000 ~-DZZ 1.00 :

CHECK VALVE 15189000 RANDOMLY FAILS TO OPEN

- 1SICV8900C-~ DZZ

- 1.00 CHECK VALVE 1 SIS 900C RANDOMLY FAILS TO OPEN ISICV89008 ~-0ZZ 1.00 CHECK VALVE 11189005 RANDOMLY FAILS TO OPEN

- 1SICv8900A---0ZZ

- 1.00 CHECK VALVE 1SI89004 RANDONLY FAILS TO OPEN 1.00:

PUMP OD UNAVAILA8LE DUE TO MAINTENANCE

- BCCPM006-----MK1

~ 1.00 PUMP OC UNAVAILABLE DUE TO MAINTENANCE BCCPM005---~MK1

' 1WDAV178-~ ~-KZZ

- 1.00 FAILURE OF VALVE FCV-WD17B TO CLOSE ON DEMAND

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' 1WDAV17A-~-*KZZ-1.00 FAILURE OF-VALVE FCV-WD17A TO CLOSE ON DEMAND 1CSCV0301109-DCC 1.00 CHECK VALVES 3,11,9 FAIL TO OPEN DUE TO CC.

1ACCB1382D --UC7 1.00' CIRCUIT BREAKER 1382D FROM 480V ESF BUS 138 TRANSFERS OPEN 1CSCV0090013-KCC 1.00 CCF OF CHECK VALVES CS005, CS009 AND CS0013 To CLOSE

-)

1CSCV005009--KCC-1.00

- CCF OF CHECK VALVES CS005 AND CS009 TO CLOSE 1CSCV0050013-KCC 1.00

~ CCF OF CHECK VALVES CS005 AND CS0013 TO CLOSE 1 ACTR137138390CC 1.00 TRANSFORMER 137, 138 AND 139 FAIL DUE TO A COMMON CAUSE 1CSCV0013009-KCC. 11.00 CCF OF CHECK VALVES CS0013 AND CS009 TO CLOSE BSWPM010102-NCC 1.00 PUMPS 1A, 2A & 2B FAIL TO RUN DUE TO CC' BCCPS005-----FK1-1.00 FAILURE OF LOW DISCRARGE PRES $URE START SIGNAL 1ESSW290---~FB1 1.00 MANUAL PHASE A ISOLATION SWITCH #290 FAILS-

' 1ESSW131290- FCC 1.00-

' MANUAL PHASE A ISOLATION SWITCH 131 AND 290 Fall COMMON CAUS

' 1ESSW131-----F81 1.00-MANUAL PHASE A ISOLATION SWITCH #131 FAILS 1ESRETR1TR2-FCC 1.00 RELAY COILS CIAX2/TR2 AND CIAX1/TR1 Fall COMMON CAUSE 1ESRERS4B--~ FD1 1.00 RELAY RS48/17-2 COIL FAILS DURING OPERATION' 1ESRERS172181FCC 1.00 '

RELAY COILS RS9/17-2 AND RS9/18-1 FAIL COMMON CAUSE

.1ESRERB172181FCC-1.00.

RELAY COILS RS48/17-2 AND RS48/18-1 FAIL' COMMON CAUSE 1ESRECVI1CVI2FCC' 1.00.

' RELAY COILS CVil/TR1 AND'CVI2/TR2 FAIL COMMON CAUSE 1ESRECIAF2-FE1 ' 1.00 -

RELAY CIAX2/TR2 Coll FAILS DURING OPERATION

- 1ESRECIA2----FE1 1.00

-RELAY CIA 2/TRZ C0ll FAILS DURING OPERATION 1ESRECIA1 CIA 2FCC 1.00 RELAY.ColLS CIA 2/TR2 AND CIA 1/TR1 Fall COMMON CAUSE 1ESRECIA1- ~ FE1 1.00

' RELAY CIAX1/TR1 Coll' FAILS DURING OPERAfl0N.

- 1ESRE8RS48 - FC7 1.00.

RELAY RS4B/18-1 C0ll FAILS DURING OPERATION 1ACDPMCC1393BMK1 1.00 MCC 13938 IS UNAVAILABLE DUE TO MAINTENANCE 1ESRE19R6- ~ FC5 1.00 DIV 19 RELAY R6 RANDOMLY FAILS DURING OPERATION 1ESRE19tS - -FC5 1.00 DIV 19 RELAY R5 FAILS DURING OPERATION

.. i 1ACCB1374A---UD1

'1.00 CIRCUlf BREAKER 1374A FROM 480V ESF BUS 137 TRANSFERS OPEN 1.00-MCC 13938 FAILS 1ACDPMCC13938FK1 ~

1.00.

DIV 19 RELAY R1, DIY 17 RELAY R1 & DIV 17 RELAY R2 Fall CC 1ESRE19R11717FCC 1ESRE1917R5-FCC.

1.00 DIV 19 AND 17 RELAY R5 FAILS DURING OPERATION DUE TO CC 1ESRE1917R218FCC..

1.00 -

DIV 19 RELAY R1, DIV 17 RELAY R2 & Div 18 RELAY R17 AIL CC 1ESRE191718R1FCC 1.00 Div 19 RELAY R1, DIV 17 RELAY R1 & DIV 18 RELAY R1 Fall CC 1ACDPMcC1393AMK1 1.00 MCC 1393A IS UNAVAILA6LE DUE TO MAINTENANCE 1ESRE18R6-- ~ FC7' 1.00 -

DIV 15 RELAV R6 RANDOMLY FAILS DURING OPERATION

,.1CCPM006-----xC1 1.00-PUMP OD RANDOMLY FAILS TO RUN 1ESREiCR5-~-FC7-

.1.00.

Div 18 RELAY R5 FAILS DURING OPERATION 3

1CCPM005-----XK1 1.00-PUMP OC RANDOMLY FAILS TO RUN 1ACDPMCC1393AMC5-1.00-MCC 1393A IS UNAVAILA8LE DUE TO MAINTENANCE 1ESRE1819R5--FCC 11.00 DIY 18 AND 19 RELAY.R5 FAILS DURING OPERATION DUE TO CC m

1ESRE1817R5 -FCC= - 1.00 -

' DIV 18 AND 17 RELAY R5 FAILS DURING OPERATION DUE TO CC 1ACDPMCC1393AFK1 1.00 MCC 1393A FAILS YHP SB2-1.00

- POWER RECOV FAILURE Pros AT 24 HRS /NO RECOVERY At 2 NRS

[

1ESRE17R117R2FCC 1.00'

DIV 17 RELAY R1 AND Div 17 RELAY R2 Fall DUE TO COMMON CAUSE 1CCCV9464- - DK1

't.00 CHECK VALVE OCC9464 RANDOMLY FAILS TO OPEN-4 DS LOC

~ 1.00 '

1/4 ARV OR 1/3 STM DNP - LOCAS 1ACDPMCC1393AFCS-1.00 MCC 13934 FAILS 1ESRE17171811FCC 1.00 DIV 17 RELAY R1 AND RELAY R2 AND DIV 18 RELAY R1 Fall DUE TO.

1ESRE171182-FCC 1.00

-- RELAY C0ll RCV/17-1 AND RCV/18-2 Fall COMMON CAUSE

.1CCCV94638-~0K1-1.00 -

CHECK VALVE 1CC94638 RANDOMLY FAILS TO OPEN

- 8SWPM1A28a --XCC 1.00' PUMPS 1A & 28 Fall TO RUN DUE TO CC

i BSWPM1A18---XCC 1.00 BSWPM010202--XCC' 1.00 PUMPS 1A, 15 & 28 Fall TO RUN DUE TO CC he,.-

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Page 13 Sep2eiter 10,1993 BSWPM010201--XCC 1.00 PUMPS 1A, 1B & 2A Fall TO RUN DUE TO CC 1ESCNTRIAS5&6UD1 1.00 TEST RELAY TRIAS/TR2 CONTACTS S&6 SPURIOUSLY OPEN 1ESCNTRIASS&60C7 1.00 TEST RELAY TRIAS1/TR1 CONTACTS 5&6 SPURIOUSLY OPEN 1ESCNTRIA25&6UE1 1.00 TEST RELAY TRIAM/TR2 CONTACTS 5&6 SPURIOUSLY OPEN BESRE1719----FCC 1.00 DIVS 17 & 19 RELAYS Fall DURING OPERATION DUE TO CC 1ESCNTRIA23&4UE1 1.00 RELAY TRI AM/TR2 CONTACTS 3&& SPURIOUSLY OPEN BESCM191817--FCC 1.00 DIVS 19, 18 & 17 RELAYS Fall DURING OPERATION DUE TO CC 1ESCNTRIA15&6UE1 1.00 TEST RELAY TRIAM/TR1 CONTACTS S&6 SPURIOUSLY OPEN 1ESCNTRIA13&40E1 1.00 RELAY TRIAM/TR1 CONTACTS 3&4 SPURIOU$lY OPEN BCCP5004-----FK1 1.00 FAILURE OF LOW DISCNARGE PRESSURE START SIGNAL SCIPM040506--XCC 1.00 PUMPS 08, OC & OD FAIL TO RUN DUE TO CC BCCPM040506--ACC 1.00 PUMPS 08, DC & OD FAIL TO START DUE TO CC BCCCVu3B6463BDCC 1.00 CHECK YALVES 2CC94638,0CC92 ' 1CC94638 Fall TO OPEN DUE CC 1ESCN501&2---UC7 1.00 TEST SWITCH #50 CONTACTS 1&J

0USLY OPEN 1ESCN453&4---UD1 1.00 TEST SWITCH #45 CONTACTS 3&4 SPURIOUSLY OPEN 2SWPs003-----FR1 1.00 FAILURE OF LOW DISCHARGE PRESSURE START SIGNAL 1ESCN219E8F--UE1 1.00 RESET SWITCH #219 CONTACTS E&F SPURIOUSLY OPEN 1ACDPMCC1383AMK1 1.00 MCC 1383A IS UNAVAILABLE DUE TO MAINTENANCE 1ACCB14742474UCC 1.00 FD BREAKER 1474 AND 2474 TRANS FER OPEN DUE TO COMMON CAUSE 2SwoM001-----XR1 1.00 SW PUMP 2A RANDOMLY FAILS TO CONTINUE TO RUN 1 ESC 419TR17&80C5 1.00 TEST RELAY TR1/19 CONTACTS 7&8 SPURIOUSLY OPEN 1ACDPMcC1383AMC7 1.00 MCC 13834 IS UNAVAILABLE DUE TO MAINTENANCE 1ACCB14741494UCC 1.00 CB 1474 AND 1494 TRANSFERS OPEN DUE TO A COMMON CAUSE 2SVCV0001--- DR1 1.00 CHECK VALVE 25U0001 RANDOMLY FAILS TO OPEN 1ESCN19SIX5&6KC5 1.00 DIV 19 RELAY SIX CONTACTS S&6 Fall TO CLOSE ON DEMAND 1ACDPMCC1383AFK1 1.00 MCC 1383A FAILS 1ACBS149-----MC5 1.00 BUS 149 UNAVAILABLE DUE TO MAINTENANCE 1ACDPMCC1383AFC7 1.00 MCC 1383A FAILS 1ESCN18TRIA560C7 1.00 TEST RELAY TRIA/18 CONTACTS 5&6 SPURIOUSLY OPEN 2DGBS2LPD-9--FG5 1.00 LOCAL DC BUS IN DG 2A PANEL 2LP09 FAILS 2DCCBRFI32---UE5 1.00 1ESCN18SIXS&6KC7 1.00 DIV 18 RELAY SIX CONTACTS S&6 FAIL TO CLOSE ON DEMAND 1ACCB14741484UCC 1.00 CB 1474 AND 1484 TRANSFERS OPEN DUE TO A COMMON CAUSE 2DCCBE114F1120CC

.1.00 CB E1-14 AND F1-12 TRANSFER OPEN DUE TO COMMON CAUSE 2DCCB212C1---UE2 1.00 CIRCUlf BREAKER 212C1 FROM DC BUS 212 TRANSFERS OPEN 1ESCN18SIX182KC7 1.00 DIV 18 RELAY SIX CONTACTS 1&2 FAIL TO CLOSE ON DEMAND 2DCCB212B1---UE2 1.00 CIRCulf PREAKER 212B1 FROM BATT 2121RANSFERS OPEN 2DCCB211C2---UE2 1.00 CIRCulf BREAKER 211C2 FROM DC BUS 211 TRANSFERS OPEN 2DCCB211C1---UE2 1.00 CIRCUlf BREAKER 211C1 FROM DC BUS 211 TRANSFERS OPEN 2DCCB011A1---UE3 1.00 CIRCULI BREAKER 011A1 FROM BATT CHARGER 011 TRANSFERS OPEN 1ESCN18R1152-KC7 1.00 DIV 18 RELAY R1 CONTACTS 1&2 Fall TO CLOSE ON DEMAND 2DCBY211212--FCC 1.00 BATTERY 211 AND 212 FAIL DUE TO COMMON CAUSE 2DCBS248-----FC8 1.00 LOCAL DC BUS IN BUS 248 FAILS 1ACBS149-----FC5 1.00 BUS 149 FAILS 2DC5C011 ----FE3 1.00 BATTERY CMARGER 011 FAILS 1CSCN17TR15&6001 1.00 TEST RELAY TR1/17 CONTACTS 5&6 SPURIOUSLY OPEN 1ESCN17siK3&4KD1 1.00 DIV 17 RELAY SIX CONTACTS 3&4 Fall TO CLOSE ON DEMAND 1ACDPMCC1372-FD1 1.00

'MCC 1372 FAILS 1ACBS148-----MC7 1.00 BUS 148 UNAVAILABLE DUE TO MAINTENANCE 1ESCN1751X1&2KD1 1.00 DIV 17 RELAY SIX CONTACTS 1&2 FAIL TO CLOSE ON DEMAND 2ACCB4718191-UCC 1.00 BREAKERS 2471, 2481, & 2491 TRANSF. OPEN DUE TO COMMON CAUSE 1ACDPMCC1371-MD1 1.00 MCC 1371 IS UNAVAILABLE DUE TO MAINTENANCE

Page 14 Septeder 10, 1993 2ACC84243444-UCC 1.00 BRCAKERS'2424, 2434,'& 2444 TRANSF. OPEN DUE TO COMMON CAUSE 2ACC82491----UC6 1.00 FD. BREAKER 2491 TO BUS 249 TRANSFERS OPEN

-1ESCN17R2112-KD1 1.00

' DIV 17 RELAY R2 CONTACTS 182 FAIL TO CLOSE ON DEMAND 2ACC82442 ~-UD4 1.00-

_FD. BREAKER 2442 TO BUS 244 TRANSFERS OPEN 1ESCN17R1112-KD1 1.00 DIV 17 RELAT R1 CONTACTS 1&2 Fall To CLOSE ON DEMAND 2ACC82434----UD4 1.00 FD. BREAKER 2434 To BUS 248 TRANSFERS OPEN 2ACCB2432----UD4 1.00 FD. BREAKER 2432 To BUS 243 TRANSFERS OPEN 1ESCN16C5&D5-0C5 1.00 TEST SWITCH #16 N-T CONTACTS C5&D5 SPUR 10USLY OPEN 1ACDPMcC1371 FD1 1.00 MCC 1371 FAILS 2ACBS248-----QD4 1.00 2ACBS248-----MD4'

-1.00 1ESCN15E11F110C7 -

1.00 TEST SWITCH #15 N-T CONTACTS E11&F11 SPURIOUSLY OPEN

- SCCPS006a--* FK1.

1.00 FAILURE OF LOW DISCHARGE PRESSURE START SIGNAL 1ESCN14A5&BS-001 1.00 TEST SWITCH #14 N-T CONTACTS A5&B5 SPURIOUSLT OPEN

-TVCPM007--- XZZ 1.00 CHARGING PUMP 18 RANDOMLY FAILS TO RUN 1ESCN139E&F~ UE1-1.00 RESET SWITCH #139 CONTACTS E&F SPURIOUSLY OPEN 1VCPM006007-xCC

-1.00 CHARGING PUMPS 1A AND 18 Fall TO RUN DUE TO Com0N CAUSE 1ACBS148 ----FC7 1.00 BUS 148 FAILS 1SWPS003-----FR1 1.00 FAILURE OF LOW DISCHARGE PRESSURE START SIGNAL 1ACBS147-----MD1 1.00 BUS 147 UNAVAILA8LE DUE TO MAINTENANCE 1SWPM001002-ACC 1.00 PUMPS 1A & 18 FAIL TO START DUE TO CC 1DG8S1LP07-- FG6-1.00 LOCAL DC BUS IN DG 0 PANEL iip 07 FAILS 1DG851LP07---FG6

' 1.00 '

LOCAL DC BUS IN DG O PANEL 1LP07 FAILS 1DGBS1LP0 FD3 1.00 LOCAL DC BUS IN DG 1A PANEL ILP09 FAILS ISWCV0001----DR1 1.00 CHECK VALVE 1SW0001 RANDUMLY FAILS TO OPEN 1DG8518-+-+- FG2' 1.00 LOCAL DC BUS IN DG 18 CONTROL PANEL FAILS

-1AFMVFW005051-CC-1.00 FAILURE OF AFW MOV FWOO50 & 51 TO CLOSE DUE TO COMMON CAUSE 1DCFU600AFUSE8E1 1.00 600 AMP FUSE IN TIE LINE FAILS.

1SIPM004-----M15 1.00-St PUMP 18 UNAVAILA8LE DUE TO MAINTENANCE.

1ACC84A202C"UCC-1.00-C81374A,1382D AND 1392C TRANS-FER OPEN DUE TO A COMMON CA 1DCFU25--*~-805 1.00

.20 AMP FUSE 25 FROM DIST. CABINET 00S 113 FAILS 1ACC8484494--UCC 1.00

' CB 1484 AND 1494 TRANSFER OPEN DUE_TO A COMMON CAUSE 1.00 St PUMP 1A UNAVAILABLE DUE TO MAINTENANCE-

.'1$1PM003---*-M15 1AFCVMS0007--DL2 1.00 CHECK VALVE 1MS0007 RANDOM FAILURE TO OPEN-1AFCVMS0006--DL2 1.00 CHECK VALVE 1MS0006 RANDOM FAILURE TO OPEN 1SICV9012DC8-DCC 1.00 CHECK VALVES 1519012D,.C. 8 FAIL'TO OPEN DUE TO COMMON CAUSE 1SICV90120C-DCC 11.00 CHECK VALVES 1519012D, C Fall TO OPEN DUE TO COMMON CAUSE 1SICV9012D8-DCC 1.00

.. CHECK VALVES IS19012D, 8 FAIL TO OPEN DUE TO COMMON CAUSE 1SICV90120-- DZZ

-1.00 CHECK VALVE ISl9012D RANDOMLY FAILS TO OPEN 1SICV9012CD--DCC-1.00 CHECK VALVES 1SI9012C, D Fall TO OPEN DUE TO COMMON CAUSE' 1SICV9012C8 -DCC.

1.00 CHECK VALVES iS89012C, 8 FAIL TO OPEN DUE TO COMMON CAUSE 1SICV9012C--DZZ' 1.00-CHECK VALVE 1SI9012C RANDOMLY FAILS TO OPEN -

1SICV9012BD--DCC 1.00'

. CHECK VALVES 15190128, D FAIL TO OPEN DUE TO CONE 04 CAUSE 1DCCBF14---~ UE1-1.00

-FD BREAKER F1-4 FROM DC BUS 112 TRANSFERS OPEN 1SICV90128C-DCC '

1.00 CHECK VALVES 15190128, C Fall 10 CPEN DUE TO COMMON CAUSE-1SICV90128---DZZ.

1.00

CHECK VALVE 15190128 RANDOMLY-FAILS TO OPEN.

1DCCBF120 ---UE1 1.00

'FD BREAKER F1-20 FROM DC BUS 112 TRANSFERS OPEN 1SICV9012AD--DCC:

1.00 CHECK VALVES IS19012A, D FAIL TO OPEN DUE TO COMMON CAUSE 1 AC8S137---- FD1 1.00 480V ESF BUS 137 FAILS-1SICV9012AC-DCC-1.00 CHECK VALVES ISI9012A, C FAIL TO OPEN DUE TO COMMON CAUSE 1DCCBE120F1200CC 1.00 ~

-CB El-20 AND F1-20 TRANSFER OPEN DUE TO COMMON CAUSE ISICV9012AB.-DCC 1.00 CHECK VALVES 1519012A, 8. FAIL TO OPEN DUE TO COMMON CAUSE

-. ~ -

.._____-.w-,_..._...

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Page 15 September 10, 1993 1SICV9012A---DZ2 1.00 CHECK VALVE 1SI9012A RANDOMLY FAILS TO OPEN 10 CCBE 120----UE1 1.00 FD BREAKER El-20 FROM DC BUS 111 TRANSFERS OPEN 1DCCBC6E13F13UCC 1.00 CB F1-13, C1-6 AND El-13 TRANS OPEN DUE TO COMMON CAUSE 10CCBC18-----UE3 1.00 FD BREAKER C1-8 FROM DC BUS 011-1 TRANSFERS OPEN 1DCCBC16E113-UCC 1.00 CB C1-6 AND El-13 TRANSFER OPEN DUE TO COMMON CAUSE 1DCCBC12F14--UCC 1.00 FD BREAKER C1-2 AND F1-4 OPEM DUE N COMMON CAUSE 1ACBS147-*---FD1 1.00 BUS 147 FAILS 1DCCBB1------UE1 1.00 CIRCulf BREAKER 11281 FROM BATT CHARGER 112 TRANSFERS DPEN 1DCCBIA211282VCC 1.00 CB 011A2 AND 11282 TRANSFER OPEN DUE TO A COMMON CAUSE 1DCCB1A1111510CC 1.00 CB 011A1 AND 11181 TRANSFER OPEN DUE TO A COMMON CAUSE 1DCCB18E12F12UCC 1.00 CB Cl-8, El-20, AND F1-20 TRANS-FER OPEN DUE TO COMMON CAUS BSWPM020102 -XCC 1.00 PUMPS 18, 2A & 28 Fall TO RUN DUE TO CC 1DCCB11B112810CC 1.00 CB 11181 AND 11251 TRANSFER OPEN DUE TO A COMMON CAUSE 1ACCB4718191-UCC 1.00 BREAKERS 1471, 1481, & 1491 TRANSF. OPEN DUE TO COMMON CAUSE 1DCCB112C1---UE1 1.00 CIRCUIT BREAKER 112C1 FROM DC BUS 112 TRANSFERS OPEN 151CV89198---DZ2 1.00 CHECK VALVE 1SICV89198 RANDOMLY FAILS TO OPEN iSICV8919AB--DCC

.1.00 CHECK VALVES 1SICV8919A & B Fall DUE TO COMMON CAUSE 1SICV8919A---DZZ 1.00 CHECK VALVE 1SICV8919A RANDOMLY FAILS TO OPEN 1DCCB11282---UE1 1.00 CIRCUIT BREAKER 11282 FROM BATT-ERY 112 TRANS-FERS OPEN iSICV8900CD--DCC 1.00 CHECK VALVES 1518900C, D Fall TO OPEN DUE TO COMMON CAUSE 1DCCB111C1-- UE1 1.00 CIRCUIT BREAKER 111C1 FROM DC BUS 111 TRANSFERS OPEN 1SICV8900BD--DCC 1.00 CHECK VALVES 15189008, D FAIL TO OPEN DUE TO COMMON CAUSE 1SICV8900BC--DCC 1.00 CHECK VALVES 15189008, C Fall TO OPEN DUE To COMMON CAUSE 10CCB11181 --UE1 1.00 CIRCUlf BREAKER 111B1 FROM BATT CHARCER 111 TRANSFERS OPEN 1SICV8900AD -DCC 1.00 CHECK VALVES 1 SIB 900A, D FAIL TO OPEN DUE TO COMMON CAUSE BSWPM1C2C----XCC 1.00 1SICV8900AC--DCC 1.00 CHECK VALVES ISl8900A, C FAIL TO OPEN DUE TO COMMON CAUSE 1DCCB011101 -UE3 1.00 CIRCUIT BREAKER 011101 FROM DC BUS 011-1 TRANSFERS OPEN ISICV8900AB--DCC 1.00 CHECK VALVES 1518900A, 8 Fall TO OPEN DUE TO COMMON CAUSE 10CBY112112--ME1 1.00 BATTERY 112 AND CHARGER 112 ARE UNAVAILABLE DUE TO EQUALIZAT 1DCBY112-----FE1 1.00 BATTERY 112 FAILS 1DCBY111112--FCC 1.00 BATTERY 111 AND 112 FAIL DUE TO A COMMON CAUSE 10CBY111-----FE1 1.00 BATTERT 111 FAILS 1DCBYO11112--FCC 1.00 BATTERY 011 AND 112 FAIL DUE TO A COMMON CAUSE 1DCBYO111112-FCC 1.00 BATTERY 011,111 AND 112 FAIL DUE TO COMMON CAUSE 1RVM0181D1E--XCC 1.00 FAN 1B, 1D & 1E FAILS TO RUN IN LOW SPEED DOE TO CC 1RvM0181D1E-FCC 1.00 FANS 18, ID & 1E FAIL 70 SWITCH TO LOW SPEED DUE TO CC 1RVM018------FA5 1.00 18 FAN FAILS TO SVITCH TO LOW SPEED RANDOMLY 1ACCB471481--UCC 1.00 FD. BREAKER 1471 AND 1481 TRANS-FER OPEN DUE TO COMMON CAUS 1RYM01A101E-XCC 1.00 FAN 1A, 10 & 1E FAILS To RUN IN LOW SPEED DUE TO CC 1RvM01A101E-FCC -

1.00 FANS 1A,10 & 1E FAIL TO SWITCH TO LOW SPEED DUE TO CC 1DCBS149-----FC5 1.00 LOCAL DC BUS IN BUS 149 FAILS 1RVM01A181E--XCC 1.00 FAN tA, 1B & 1E FAILS TO RUN IN LOW SPEED DUE To CC 1RVM01A181E--FCC 1.00 FANS 1A, 1B & 1E FAIL TO SWITCH TO LOW SPEED DUE TO CC 1DCBS148-----FC7 1.00 LOCAL DC BUS IN BUS 148 FAILS 1RYM01A18101EXCC 1.00 FAN ' A,18,1D,1E FAILS TO RUN IN LOW SPEED DUE To CC 1RVM01A181D1EFCC 1.00 FANS 1A,19,10,1E Fall TO SWITCM TO LOW SPEED DUE TO CC 1DCBS147--

FD3 1.00 LOCAL DC BUS IN BUS 147 FAILS 1RVM01A1910--XCC 1.00 FAN 1A, 18 & 10 FAILS TO RUN IN LOW SPEED DUE TO CC 1RvM01A181D--FCC 1.00 FANS 1A, 1B & 1D FAIL TO SWITCH TO LOW SPEED DUE TO CC 1DCBS147-----FD1 1.00 LOCAL DC BUS IN BUS 147 FAILS 1RVM01A-- ---FA5 1.00 1A FAN FAILS To SWITCH TO LOW SPEED RANDOMLY f

Page 16 Septeat>er 10, 1993 1RVM01E ~ ~ --FA5 1.00 1E FAN FAILS TO SV!TCM TO LOW SPEED RANDOMLY 10CBS142- -- F03 1.00 LOCAL DC BUS IN BUS 142 FAILS 1RVM010~----FA5 1.00 1D FAN FAILS TO SWITCM TO LOW SPEED RANDOMLY 1DCBS137-~ ~ FD1 1.00 LOCAL DC BUS IN BUS 137 FAILS 1DCBS112----FE1 1.00 DC BUS 112 FAILS 2ACCB2444----UD4 1.00 FD. BREAKER 2444 To BUS 249 TRANSFERS OPEN 1ACBS144----FD3 1.00 BUS 144 FAILS 2ACCB2481----UC8 1.00 FD. BREAKER 2481 TRANSFERS OPEN 1DCBC112-~~-FE1 1.00 BATTERY CHARGER 112 FAILS 1DCBC111112--FCC 1.00 BATTERY CHARGER 111 AND 112 FAIL DUE TO A COMMON CAUSE 1DCBC111-----FE1 1.00 BATTERY CHARGER 111 FAILS 1DCBC011111-FCC I.00 BATTERY CHARGER 011 AND 111 Fall DUE TO COMMON CAUSE 1ACCB4243444-UCC 1.00 BREAKERS 1424, 1434, & 1444 TRANSF. OPEN DUE TO COMMON CAUSE 1ACBS143- ---FD3 1.00 BUS 143 FAILS 1MSSv0304 ---KCC 1.00 CCF OF STOP VALVES SV0003, SY0004 TO CLOSE 1MSSV0204- --KCC 1.00 CCF STOP VALVES SV0002, SV0004 TO CLOSE 1MSSv0203--+KCC 1.00 CCF OF STOP VALVES SV0002 & SV0003 TO CLOSE IMSSV0103--~ KCC 1.00 CCF OF STOP VALVES SV0001 & SV0003 TO CLOSE iMSSV0102---KCC 1.00 CCF OF STOP VALVES SV0001 & SV0002 TO CLOSE 1ACCB3820392CUCC 1.00 CB 1382D AND 1392C TRANSFER OPEN DUE TO A CmMON CAUSE 1ACCB1392C-~ UC5 1.00 CIRCUIT BREAKER 1392C FROM 480V ESF BUS 139 TRANSFERS OPEN 1CSMV007004~ DCC 1.00 1MOV-C50002 AND 1MOV-CS0004 Fall TO OPEN DUE TO CC 1MSGv0304 - ~ KCC 1.00 CCF OF GOV. VALVES GV0003, GV0004 TO CLOSE 2DCBS211-~--FE2 1.00 DC BUS 211 FAILS 1MSGV0204---KCC 1.00 CCF OF COV. VALVES GY0002, GV0004 TO CLOSE 1ACCB374B373AUCC 1.00 CB 13748 AND 1373A TRANSFER OPEN DUE TO A COMMON CAUSE 1MSGv0203 ~--KCC 1.00 CCF OF GOV. VALVES GV0002 & GV0003 To CLOSE 1MSGYO104---KCC 1.00 CCF OF GOV. VALVES GV0001, GY0004 TO CLOSE 1MSGV0103---KCC 1.00 CCF OF GOV. VALVES GV0001 & GV0003 TO CLOSE 1MSGV0102----KCC 1.00 CCF OF GOV. VALVES GV0001 & GV0002 1CSCV0509013-DCC 1.00 CHECK VALVES 5,9,13 FAIL TO CPEN DUE TO CC 1CSCV0507013-DCC 1.00 CHECK VALVES 5,7,13 FAIL TO OPEN DUE TO CC 1CSCV0507011-DCC 1.00 CHECK VALVES 5,7,11 Fall TO OPEN DUE TO CC 1ACCB374A382DUCC 1.00 CB 1374A AND 1382D TRANSFER OPEN DUE TO A COMMON CAUSE 1CSCV0501109-DCC 1.00 CHECK VALVES 5,11,9 Fall TO OPEN DUE TO CC 1CSCV0309013-DCC 1.00 CHECK VALVES 3,9,13 FAIL TO OPEN DUE TO CC 1CSCV0307013-DCC 1.00 CHECK VALVES 3,7,13 FAIL-TO OPEN DUE TO CC 1CSCv0307011-DCC 1.00 CHECK VALVES 3,7,11 Fall TO OPEN DUE TO CC 2DCCBF112- ~ UE2 1.00 FD BREAKER F1-12 FROM DC BUS 212 TRANSFERS OPEN 1DCBT111111--ME1 1.00 BATTERY 111 AND CHARGER 111 ARE UNAVAILABLE DUE TO EQUAllZAT 1DCBT011011--ME3 1.00 BATTERY 011 AND CHARGER 011 ARE UNAVAILABLE DUE TO EQUALIZAT AFWFACTOR 1.00

.AFW 13 HOUR RUM FACTOR 1ACCB1472---KD1 1.00 rD. BRKR. 1472 TO ESF BUS 147 FAILS TO CLOSE 1CSMv0005- - TZZ 1.00 COMP. FAULT IN SEGMENT N 1MOV-CS0005 & TRA!N B TEST UNAVAX.

1CSPM0028~ ~ AJS 1.00 CS PUMP CS002-1B FAILS To START RANDOMLY 1CSPM0018---MJ5 1.00 SEGMENT F (TRAIN B) UNAVAILABLE DUE TO MAINTENANCE 1ESit18tSI-- FC7 1.00 DIV 18 MECMANICAL CAM TIMER TSI FAILS DURING OPERATION 1ESRE17a2-~ F01 1.00 DIV 17 RELAY R2 FAILS DURING OPERATION 151PM003----A15 1.00 St PUMP 1A RANDOMLY FAILS TO START ISICV8922A--D22 1.00 CHECK VALVE 1 SIB 922A RANDOMt.Y FAILS TO OPEN 1CSxV0040 - -GJ5 1.00 COMPONENT FAULT IN SEGMENT G: VALVE 1CS0040 LEFT OPEN 1MSAv0017--~ MZZ 1.00 MAINTENANCE UNAVAILABILITY OF VALVE 1MOV-MS0017

Page IF

- Septenber 10, 1993 1MSMv0019-- -MZZ-1.00 MAINTENANCE UNAVAILABILITY OF VALVE MOV-MS0019 1MSm/0018-~-MCC 1.00 MAINTENANCE UNAVAILABILITY OF VALVE MOV-MS0018

1CSPM0028 - ~ xJ5

.999 CS PUMP CS002-18 FAILS TO RUN RANDOMLY TCSMV0004~ "DJ5

.999 1MOV-CS0004 FAILS TO OPEN RANDOMLY-1ESCNTRl852340C5

.999~

TEST RELAY TR1852/TR1 CONTACTS 3&4 SPURIOUSLY OPEN 1ESCN19TR18340C5

.999 TEST RELAY TR1B/19 CONTACTS 3&4 SPURIOUSLY OPEN TEST SWITCH #16 N-TS CONTACTS G10&M10 SPURIOUSLY OPEN

r-1EstN16G10M100C5

.999 1MSMV0020- --MZZ

.998 MAINTENANCE UNAVAILABILITY OF VALVE MOV-MS0020 -

1MSAV0020AM--DZZ

'.998

- ARY MCTJ-M50020 VALVE STICKS OR FAILS To ODEN (FAULT IN VALVE 1CSXV0043 --GJ5

.997 COMPONENT FAULT IN SEGMENT K: VALVE 1CS0043 LEFT OPEN 1ESRE19R38-~FC5

.997 DIV 19 RELAY R38 FAILS DURING OPERATION

- 1ESRE19R3A-~FC5

'.997 DIV 19 RELAY R3A FAILS DURING OPERATION 1CSMv0007- --TZZ

.997 COMP. FAULT IN SEGMENT'L: 1MOV-CS0007 & TRAIN C TEST UNAVAl 1CSPM003C----XJ5

.997 CS PUMP CS003*1C FAILS TO RUN RANDOMLY 1ESil19Tst-~ FCS

.997 DIV 19 MECMANICAL CAM TIMER FAILS DURING OPERATION 1CSPM001C~ ~ MJ5

'.997 SEGMENT J (TRAIN C) UNAVAILABLE DUE TO MAINTENANCE 1ES--MINICTPRFE1

.997 CONTAINMENT HIGH-HIGH PRESSURE SIGNAL FAILS 1CSMV0006-~ DJ5

.997 1MOV-CS0006 FAILS TO OPEN RANDOMLY 1CSPM003C---AJ5

.997 CS PUMP CS003-1C FAILS TO START RANDOMLY 1CSPM01A018 -XCC

~.995 _

MOTOR DRIVEN PUMPS 1A AND 18 FAIL TO RUN DUE TO CC 1CSPM01A018--ACC

.995 MOTOR DRIVEN PUMPS 1A AND 18 Fall TO START DUE TO CC 1DCFU600A~- BE1

.990 600 AMP FUSE IN TIE LINE FAILS

- 1DCFU225A ~ ~ 8E3

.990-225 AMP FUSE IN TIE LINE FAILS 1CSMV004006 -DCC

.990-1MOV-CS0004 AND 1MOV-CS0006 FAIL TO OPEN DUE TO CC 1CSMV002006-DCC

.990' 1MOV-CS0002 AND iMOV-CS0006 FAIL TO OPEN DUE TO CC

~1ESil1819fSI-FCC

.987 DIV 18 & 19 MECH CAM TIMER TSI FAILS DURING OP. DOE TO CC 1ESTI1719TSI-FCC

.987 DIV 17 & 19 MECH CAM TIMER TSI FAILS DURING OP. DUE TO CC 1ESCN17tRTA560D1

.978 TEST RELAY TR1A/17 CONTACTS 5&6 $PURIOUSLY OPEN 1ESCN14E11F11001

.978 TEST SWITCN #14 N-T CONTACTS E11&F11 SPURIOUSLY OPEN 1RVM01C~-- ~ XA5

.978 1C FAN FAILS TO RUN IN LOW SPEED RANDOMLY 1RVHE003---~MA5

.978 SEGMENT C UNAVAILABLE DUE TO MAINTENANCE 1SWNv0009---DZZ

.978 OUTLET VALVE 1MOV-SW0009 FAILS TO OPEN RANDOMLY 1RVM01C~--~ AA5

.978 1C FAN FAILS TO START.IN LOW SPEED RANDOMLY 1ESRE17R5----FD1

.978 DIV 17 RELAY R5 FAILS DURING OPERATION 1ESCN17sIX5&6KD1

.9 73 -

Div 17 mAY SIX CONTACTS S&6 Fall TO CLOSE ON DEMAND 1ESCN17R51&2*KD1

.973 siv 17 W Y R5 CONTACTS 1&2 FAIL TO CLOSE ON DEMAND 1ACC81491 ~ -UC5

.971.

FD. BREAKER 1491 TRANSFERS OPEN 1ACCB1481 "- UC7

.971 FD.' BEEAKER 1491 TRANSFERS 044 1ACCB1444 -~ UD3!

'.971 FD. BREAKER 1l ~4 TO SUS 149 TRANSFERS OPEN 1ACC81434- - UD3

.971 FD. 8REAKER 145 TO BUS 148 TRANSFERS OPEN,

' 1ACCB1432--~UD3

.971 FD. 84EAKER 1432.0 80S 143 TRANSFERS OPEN

- 1MSAV171819200CC

.919 CCF TO OPEN OF ARV MS0017, MS0018 MS0019 & MS0020 1MSAV019020--DCC

.918 CCF To OPEN OF ARV MS0019 AND MS0020 1MSAV018020--DCC

.918 CCF TO OPEN OF ARV MS0018 AND MS0020 -

1MSAv017020 -DCC~

.918 CCF TO OPEN OF ARV MS0017 AND MS0020 1SICV90128CD DCC

.912

. CHECK VALVES 15190128, C,'D FAIL TO OPEN DUE TO COMMON CAUSE 1SICV9012ACD-DCC

.912 CHECK VALVES 1Sl9012A,'C, O Fall TO OPEN DUE TO COMMON CAUSE ISICV9012A80-DCC

.912 CWECK VALVES 15t9022A, 8, D FAIL TO OPEN DUE TO COMMON CAUSE 1SICV9012ABC-DCC

.912 CHECK VALVES 1519012A, 8, C Fall TO OPEN DUE TO COMMON CAUSE' 1SICV8922A8--DCC

.909' CHECK VALVE 1818922A AND 8 FAIL TO OPEN DUE TO COMMON CAUSE 1ESRE17R218R1FCC.

.900 - '

DIV 17 RELAY R2 AND DIV 18 RELAY R1 FAIL DUE TO COMMON CAUSE

- 1SICV9012A8CDDCC

.897

~ CHECK VALVES 1Sl9012A,8,C,0 Fall TO OPEN DUE TO COMMON CAUSE 4+

-'=m--

--- e a.

==E

-.a

'a'--

ww

t-Nm-e en+*e w rw 1

h4- ' --w-=-w e

v D w"

-eva*'P W

w'*+e9i' rt'Wr-****'twsv wr'sagn:r'-7 e

--2:1w'9w w

erat-m4-n-*re.T 1r*D-mw e

-M'v'm=4--

sureeb4=*

W-ees-4

• e m--

erh.!-

ewa-is w+<-

.- n 1

Page 1Q Septecber 10, 1993-1SIPM003004--ACC

.896 51 PUMPS 1A AND 18 FAIL TO START DUE To COMMON CAUSE ISICV8926----015

.896 CHECK VALVE 1518926 RANDOMLY FAILS TO OPEN IN SEGMENT K 1MSAV181920--DCC

.895 CCF TO OPEN OF ARY MS0018, M50019 AND MS0020 1MSAV171920--DCC

.895 CCF TO OPEN OF ARV MS0017, MS0019 AND MS0020 1MSAV171820--DCC

.895 CCF TO OPEN OF ARY MS0017, M50018 AND MS0020 1EST!17189TSIFCC

.882 DIV 17,18 & 19 MECH CAM TIMER TSI FAILS DURING OPER. DUE TO 1CSMV020406--DCC

.881 1MOV CS0002,-004 & -006 FAIL TO OPEN DUE TO CC 1ESRE78R39R3BFCC

.8 77 DIV 17 & 18 R3 & DIV 19 R38 RELAY FAILT DURING OPER. DUE TO 1ESRE78R39R3AFCC

.877 DIV 17 & 18 R3 & DIV 19 R3A RELAY FAILS DURING OPER. DUE TO 2DC8Y 311 -----F E3

.755 BATTERY 011 FAILS 10CCB11182---UE1

.278 circuli BREAKER 11182 FROM GATT-ERY 111 TRANS-FERS OPEN 1DCCB011A2---UE3 4.717E-02 CIRCUIT BREAKER 011A2 FROM BATT-ERY 011 TRANS-FERS OPEN 1DCBS111-----FE1 3.754E-02 DC BUS 111 FAILS 1DCBS0111----FE3 3.754E-02 DC BUS 011-1 FAILS Sto_2

.000 CONSEQUENTIAL SMAll. LOCA (WITN SW OR CCW)

LDCPRT1

.000 SUCCESS EVENTS IMSGV020304 -KCC

.000 CCF OF GOV. VALVES GY0002, GV0003,GV0004 TO CLOSE

i 3 ;.

b TTA tHMEM Y

Page 1

~l August 17, 1993

\\

210N STATION I

IMPORTANCE OF EACH PRT NODE QUANTIFICATION j

Conponent Risk Reduction Description Worth l

AC LSC 1.00 ALIGN CHARGING PUMP SUCTION TO THE RWST AFI STR1 1.00

- CLOSE MOV FWOO50 & 051 ALL POWER AVAIL i

AFW[AT 1.00 1/1 AUX FEED TDP OR 2/2 MDP TO 1/4 SGS (OPEN THRTL VALVES)

- AFW STR 5 1.00 1/3 AUX FEED PMPS TO 4/4 SG 147 AVAIL AF[LSP[4 1.00 1/3 AUX FEED PMPS TO 4/4 SG OR 1/4 SG W/0A 148 & 149 AVAll j;

AFW LSP,6 1.00 1/3 AUX FEED PMPS TO 4/4 SG OR 1/4 SG W/0A 148 AVAIL 7

AFW L$P,7 1.00 1/3 AUX FEED PMPS TO 4/4 SG OR 1/4 SG W/0A 149 AVAIL t

AFW LSP,8 1.16 1/3 AUX FEED PMPS TO 4/4 SG NO POWER

'l AFW SBOTD 1.00 1/1 AUX FEED TDP TO 4/4 SGS AF [TRA 1 1.00 1/3 AUX FEED PMPS TO 4/4 SG OR 1/4 SG W/0A ALL POWER

~ ~

AFW TRA 6 1.00 1/3 AUX FEED PMPS TO 4/4 SG OR 1/4 SG W/0A 148 AVAIL AFW TRA 7 1.00 1/3 AUX FEED PMPS TO 4/4 SG OR 1/4 SG W/0A 149 AVAIL l

~ ~

~ ~

AFW TRA 8 1.00 1/3 AUX FEED PMPS TO 4/4 SG NO POWER ALT [MFWI 1.00 1/3 MFW TO 1/4 SGs & 1/4 CSPs - LOSS OF 011 1 OR LOSP AM_ATW 1.00 ATWS MITIGATING SYSTEM ACTUATION CIRCUIT t

BUS LSP,1 1.00 AC POWER WITH LOSP 147,148,149 FAIL l

BUS _LSP,4 1.00 AC POWER WITH LOSP 148,149 FAIL BUS,DSP,1 1.09 AC POWER WITH DLOSP 147,148,149 Fall BUS,DSP_2 1.01 AC POWER WITH DLOSP 147,148 FAIL l

BUS,DSP,3 1.00 AC POWER WITH DLOSP 147,149 FAIL BUS _DSP,4 1.16 AC POWER WITH DLOSP 148,149 Fall BUS DSP,5

• 00 AC POWER WITH DLOSP 147 FAILS t

BUS,DSP,6 1.00 AC POWER WITH DLOSP 148 FAILS i

BUS,DSP,7 1.00 AC POWER WITH DLOSP 149 FAILS BUS,OSP,1 1.00 AC POWER WITH OFFSITE 147,148,149 FAIL BUS,0$P,3 1.00 AC POWER WITH OFFSITE 147,149 FAIL BUS CSP,4 1.00 AC POWER WITH OFFSITE 148,149 FAIL g

BUS,0SP,5 1.00 AC POWER WITH OFFSITE 147 FAILS

?

CB 1 1.00 1/4 COND BOOSTER PMPS TO 1/4 SGS - LOSS OF 011-1 OR LOSP CC(SLO,1 1.02 1/2 CCPs !NJECTING TO 2/4 C LEGS ALL POWER l

CCP,$LO,4 1.00 1/2 CCPs INJECTING To 2/4 C LEGS 148 & 149 AVAIL

,l CCP, SLO,8 1.01 1/2 CCPs INJECTING To 2/4 C LEGS NO POWER.

-f CCW 1.00 LOSS OF COMPONENT COOLING WATER CCW DLP 7 1.00 COMPONENT COOLING WATER W/DLOSP-148&149 Fall CCW[ LOC [1 1.00 COMPONENT COOLING WATER W/LOCA ALL POWER CCW TRA,1 1.00 COMPONENT COOLING WATER W/TRAN-ALL POWER v

Cl_ALL 1.00 CONTAINMENT ISOLATION (ESFAS SUCCESS, SPRAT ACTUATED)

C1 3 1.00 CONTAINMENT ISOLATION (ESFAS FAILED, SPRAY ACTUATED)

CSI,5 1

1.00 1/3 CONTAINMENT SPRAY PUMPS ALL POWER

CSI, 1.02 1/3 CONTAINMENT SPRAY PUMPS 147 AVAIL CSI,8 1.02 1/3 CONTAINMENT SPRAT PUMPS NO POWER AVAll DCB,LSP,1 1.00 DC POWER WITH LOSP 011 1,111,112 FAIL DCB,LSP,3 1.00 DC POWER WITH LOSP 011-1,112 FAIL DCB,LSP,4-1.00 DC POWER WITH LOSP 111,112 Fall DCB,0SP1 1.00 DC POWER W/OS 011 1,111,112 FAIL-ALL POWER DCB,0SP13 1.00 DC POWER W/05 011 1,112 FAIL 147&149 AVAll DCB,0SP17 1.00 DC POWER W/OS 111,112 FAIL 148&149 AVAIL DS DC 1.00 1/4 ARV OR 1/12 STM DNP - LOSS DC j

DS, LOC 1.00 1/4 ARV OR 1/3 STM DMP - LOCAS DS STR 1.00 2/3 ARV ON INTACT SGs OR 2/3 STM DNP EC[LSC 1.00 1 FIREWATER PHP & VALVES TO OPERATING CCP - ALL POWER ESF,NDA,1 1.02 ESFAS NO OPER ACTION BOTH TRAINS Fall ESF,WGA,1 1.00 ESTAS W/0P ACTION BOTH 3 a!NS FAIL

'j ESF MAN,1 1.00 ESFAS MANUAL; HDW ONLT-BOTH TRAINS Fall j

FC11 1.00 1/5 FAN COOLERS ALL POWER FC1X 1.00 1/5 FAN COOLERS ALL POWER WITH RESTORATION (FC11+0RE,$BO)

FC15 1.00 1/5 FAN COOLERS 147 AVAIL FC18 1.01 1/5 FAN COOLERS NO POWER l

FC21 1.00 2/5 FAN COOLERS ALL POWER HPI,ATW 1.00 HIGH PRESSURE INJECTION ASSUMED TO FAIL - ATWS 1

~

r r

i t

?

)

t Page 2 August 17, 1993 HPI_LL_1 1.00 1/4 HIGH PRESSURE INJ PMPS TO 2/3 C LEGS ALL POWER (COND)

HPI LL_8 1.02 1/4 HIGH PRESSURE INJ PMPS To 2/3 C LEGS NO POWER i

HP!_LSP_1 1.00 1/4 HIGH PRESSURE INJ PMPS TO 2/4 C LEGS ALL POWER HPI_LSP_5 1.00 1/4 HIGH PRESSURE INJ PMPS TO 2/4 C LEGS 147 AVAIL HPI LSP 6 1.00.

1/4 HIGH PRESSURE INJ PMPS TO 2/4 C LEGS 148 AVAIL

~

HPl[TRA1 1.00 1/4 HIGH PRESSURE INJ PMPS To 2/4 C LEGS ALL POWER HPI TRA B 1.00 1/4 HIGH PRESSURE INJ PMPS TO 2/4 C LEGS NO POWER

~ ~

HPR LOC 1 1.00 1/4 HIGH PRESSURE RECIRC 70 2/3 C LEGS ALL POWER (COND) i

~

HPR SLOS1 1.00 1/2 S!Ps RECIRC 70 2/4 C LEGS ALL POWER (COND) f HPR[$LOS8 1.00 1/2 SIPS RECIRC TO 2/4 C LEGS NO POWER HPR TRA 1 1.00 1/4 HIGH PRESSURE REclRC TO 2/4 C LEGS ALL POWER (COND)

~ ~

HPR LSP 1 1.00 1/4 HIGH PRESSURE REC 1RC 70 2/4 C LECS ALL POWER (COND)

~ ~

HPR TRA 2 1.00 1/4 HIGH PRESSURE RECIRC TO 2/4 C LEGS 147 & 148 AVAIL

~ ~

HPR TRA 3 1.00 1/4 HIGH PRESSURE REclRC TO 2/4 C LEGS 147 & 149 AVAIL

~

HFR[LDC3 1.00 1/4 HIGH PRESSURE RECIRC 10 2/5 C LEGS 1478149 AV (COND)

HPR TRA 4 1.00 1/4 HIGH PRESSURE RECIRC TO 2/4 C LEGS 148 & 149 AVAIL

~ ~

HPR TRA 6 1.00 1/4 HIGH PRESSURE RECIRC 70 2/4 C LEGS 148 AVAIL

~ ~

HPR TRA 7 1.00 1/4 HIGH PRESSURE REclRC To 2/4 C LEGS 149 AVAll MPR TRA 8 1.14.

1/4 HIGH PRESSURE RECIRC.TO 2/4 C LEGS No POWER HPR SBO' 1.00 1/2 CCPs RECIRC 70 2/4 C LEGS ALL POWER AVAILABLE (COND)

~

LPl[LL_1 1.12 1/2 LOW PRESSURL (NJ PMPS TO 2/3 C LEGS ALL POWER LPI_LL_2 1.00 1/2 LOW PRES $URE INJ PMPS To 2/3 C LEGS 147 & 148 AVAIL LPI_LL_3 1.00 1/2 LOW PRESSURE INJ PMPS 70 2/3 C LEGS 147 & 149 AVAIL i

LPI LL 8 1.02 1/2 LOW PRESSURE INJ PMPS TO 2/3 C LEGS NO POWER

~

LPlML[1 1.01 1/2 LOW PRESSURE INJ PMPS To 2/4 C LEGS ALL POWER (COND)

LPI_ML_4 1.00 1/2 LOW PRESSURE INJ PMPS 70 2/4 C LEGS 148 & 149 AVAIL LPI ML 5 1.00 1/2 LOW PRESSURE INJ PMPS To 2/4 C LEGS 147 AVAIL LPlML[8 1.00 1/2 LOW PRESSURE INJ PMPS TO 2/4 C LEGS NO POWER

~

LPI_ SLO _1 1.02 1/2 RHR PUMPS ON MIN! FLOW ALL POWER LPI_ SLO _8 1.00 1/2 RHR PUMPS ON MINIFLOW NO POWER LPR LL 1 1.03 1/2 LOW PRESSURE REclRC TO 1/3 C LEGS ALL POWER (COND)

LPR_LL[2 1.00 1/2 LOW PRESSURE RECIRC TO 1/3 C LEGS 149 AVAIL LPR LL 3 1.00 1/2 LOW PRESSURE RECIRC 701/3 C LEGS 148 AVAIL LPR ML'1 1.04 1/2 LOW PRESSURE RECIRC TO 2/4 C LEGS ALL POWER (COND)

~

LPR[ SLO _1 1.00 1/2 LOW PRES $URE RECIRC TO 2/4 C LEGS ALL POWER (COND)

.- [

LPR_ SLO _2 1.00 1/2 LOW PRESSURE REclRC TO 2/4 C LEGS 149 AVAIL MF ATW 1.00 FRACTION OF TRANS1ENTS MAIN FEED UNAVAIL UNTIL TURBINE TRIP OAC LSC 1.00 OP ACTION - ALIGN CHARGING SUCTION To RWST

~

OCC LCW 1.00 OP ACTION RESTORE COMPONENT COOLING WATER -

~

OAF STR 1.00 OP ACTION - ISOLATE FEED TO RUPT SG

~

ODS SLO 1.00 OP ACTION - SG DEPRES FOR PRIM COOLING (0051a)

~

ODS MLO 1.00 OP ACTION - SG DEPRES FOR PRIM COOLING (ODS1b)

~

ODS STR 1.21 OP ACTION - SG DEPRES FOR PRIM COOLING (0D$2)

~

005 ALL 1.00 OP ACTION - SG DEPRES FOR PRIM COOLING (0053)

~

OEC LSC 1.00 OP ACTION - FIREWATER TO CCP 01L COOLER

?

OHX[ALL 1.00 OP ACTION - ESTAB CCW TO RHR HEAT EXCHANGER 01B ISL 1.00 OP ACTION - !$0 LATE RHR BREACH

~

OIR STR 1.14 OP ACTION - MlWIMI2E ECCS FLOW

~

ONC SLO 1.00 OP ACTION - ESTAB NORMAL CHARGING (ONC2)

~

OPR_ALL 1.00 OP ACTION - DEPRES PRIM WITH PRZR PORVS -

ORC HPR 1.00 OP ACTION - ESTAB HIGH PRES $URE ECC RECIRC

~

l ORC LPR 1.04 OP ACTION - ESTAB LOW PRESSURE ECC RECIRC ORC [LLS 1.20 OP ACTION ESTAB LOW PRESSURE ECC RECIRC (LLOCA W/ SPRAY)

ORE SB0 1.04 OP ACTION

• RESTORE EQUIP & SUPPORT SYSTEMS ORF ALL 1.00 OP ACTION - RESTORE CB &/0R MFW

~

ORS [ALL 1.00 OP ACTION - RAPID SG DEPRES FOR CB INJ (ORS 1)

ORS SB0 1.00 OP ACTION - RAPID SG DEPRES FOR CB INJ (ORS 2)

-l

~

ORT ALL 1.23 OP ACTION - REFILL THE RWST

~

ORT LLO 1.17 RWST REFILL NOT POS$1BLE FOR LARGE LOCA WITH CURRENT E0Ps

~

OSC LCW 1.00 OP ACTION STOP CCW PUMPS-i Ost ALL 1.00 OP ACTION - INITIATE SAFETY INJECT 10N' OSl[NOESF 1.00 OP ACTION INITIATE SAFETY INJECTION (ESFAS HDW FAILED) i OSW LSW 1.00 OP ACTION RESTORE SW AND AllGN CCW OTT[ATW 1.00 OP ACTION - TURB TRIP OR CLOSE MSIVS PL_ATW 1.00 POWER LEVEL GREATER THAN 60 PERCENT PRV 1-1.00 1/2 PRZR PORVS - ALL POWER RHX_ALL_2 1.00 1/2 RHR HEAT EXCHANGERS 148 FAILED (1/1) l RHX,ALL,3 1.00 1/2 RHR HEAT EXCHANGERS 149 FAILED (1/1)

' l

Page 3 August 17, 1993 RHX ALL 5 1.00 2/2 RHR HEAT EXCHANGERS 14B&149 AVAILABLE RHX[ SLO [5 1.00 2/2 RHR HEAT EXCHANGERS 148&149 AVAILABLE (COND)

RHX_ALL_6 1.02 2/2 RHR HEAT EXCHANGERS 148 OR 149 FAILED RTK ALL 1.00 EQUIPMENT TO REFILL THE RWST RTK_STR 1.13 EQUIPMENT TO REFILL 1HE RWST (SGTR)

RTK LOC 1.11 EQUIPMENT TO REFILL THE RWST FOR LOCAs (RTK_ALL+0.25)

RTK_ FAIL 1.16 EQUIPMENT TO REFILL THE RWST (POWER UNAVAILABLE)

RXT_TRA 1.00 FAILURE OF REACTOR TRIP SAC _0SP2 1.00 SAF ACT 17,18,19 FAIL-ONE ESFAS AVAIL SAC _0$P7 1.00 SAF ACT 18,19 FAIL-BOTH ESFAS AVAIL (W/ RESTORATION)

SAC _0$P8 1.00 SAF ACT 18,19 FAIL-ONE ESFAS AVAIL SAC _0SP12 1.00 SAF ACT 18 FAILS-ONE ESFAS AVAll SAC _0$P14 1.00 SAF ACT 19 FAILS-ONE ESFAS AVAIL SAC _ MAN 1.00 MANUAL ACTUATION OF SAFEGUARDS EQUIPMENT (RE_SBO+0RE_SBO)

SAC FAIL 1.02 MANUAL ACTUATION OF EQUIPMENT NOT MODELED FOR LARGE LOCA

$80,1 1.12 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT

$1P_ SLO _1 1.00 1/2 SAFETY INJECTION PMPS 70 2/4 C LEGS ALL POWER SIP _ SLO _8 1.01 1/2 SAFETY INJECTION PMPS TO 2/4 C LEGS NO POWER Sto_1 1.00 CONSEQUENTIAL SMALL LOCA No SW/CCW (EC_LSCX+0EC_LSC+ SLO _2)

SWS 1.00 LOSS OF SERVICE WATER SVS_DLP_1 1.00 SERVICE WATER W/DLOSP-ALL POWER SWS_DLP_2 1.00 SERVICE WATER W/DLOSP-147 FAILED SWS DLP_3 1.00 SERVICE WATER W/DLOSP-148 FAILED SWS_DLP_4 1.00 SERVICE WATER r gLOSP 149 FAILED SWS DLP 5 1.01 SERVICE WATER W/DLOSP-147&148 Fall SWS[DLP[6 1.00 SERVICE WATER W/DLOSP-147&149 FAIL SWS_DLP_7 1.00 SERVICE WATER W/DLOSP-1481149 Fall SWS_ LOC _1 1.00 SERVICE WATER W/LOCA-ALL POWER SWS_LSP_1 1.00 SERVICE WATER W/LOSP-ALL POWER SWS_TRA_1 1.00 SERVICE WATER W/TRAN-ALL POWER TT_1 1.00 CLOSE 4/4 STOP OR 4/4 GOV. VALVES FOR TURBINE TRIP XCC_S2 1.00 CORE UNCOVERED PRIOR TO POWER RECOVERY AT 2 HRS (SEALLOCA)

XCC_S16 1.00 CORE UNCOVERED PRIOR TO POWER RECOVERY AT 16 HRS (SEALLOCA)

XCC_S24 1.06 CORE UNCOVERED PRIOR TO POWER RECOVERY AT 24 HR$ (SEALLOCA)

XHR $2 1.00 POWER RECOV FAILURE PROB AT 2 HR$ (TD FAIL)

XHR S24 1.00 POWER RECOV FAILURE PROB AT 24 HR$ (TD & DS)

~

YHR SB2 1.00 POWER RECOV FAILURE PROB AT 24 HRS /NO RECOVERY AT 2 HRS DLOOP-SS1 1.00 SUCCESS EVENTS TRAN-SS1 1.00 SUCCESS EVENTS LOC S$1 1.00 SUCCESS EVENTS DLOOPSWS-SS198 1.00 SUCCESS EVENTS DLOOPBUS-S$198 1.00 SUCCESS EVENTS LOOP-S$198 1.00 SUCCESS EVENTS DLOOP-SS200 1.00 SUCCESS EVENTS LOOP-S$200 1.00 SUCCESS EVENTS GTR-SS105 1.00 SUCCESS EVENTS GTR S$117 1.00 SUCCESS EVENTS LDC-SS22 1.00 SUCCESS EVENTS MLPRT1 1.00 SUCCESS EVENTS MLPRT2 1.00 SUCCESS EVENTS MLPRT3 1.00 SUCCESS EVENTS SLPRT1 1.00 SUCCESS EVENTS SLPRT3 1.00 SUCCESS EVENTS SLPRT4 1.00 SUCCESS EVENTS SLPRT5 1.00 SUCCESS EVENTS SGTRPRT1 1.00 SUCCESS EVENTS r

SGTRPRT3 1.00 SUCCESS EVENTS SGTRPRT4 1.00 SUCCESS EVENTS SG1RPRT8 1.00 SUCCESS EVENTS Dt.00PPRT2 1.00 SUCCESS EVENTS DLOOPPRT6 1.00 SUCCESS EVENTS DLOOPPRT7

.998 SUCCESS EVENTS DLOOPPRT8

.998 SUCCESS EVENTS DLOOPPRT10

.996 SUCCESS EVENTS DLOOPPRT14 1.00 SUCCESS EVENTS DLOOPPRT17 1.00 SUCCESS EVENTS DLOOPPRT19 1.00 SUCCESS EVENTS LOOPPRT2 1.00 SUCCESS EVENTS

[1 t

Page 4 August 17, 1993 LOOPPRT3 1.00 SUCCESS EVENTS LOOPPRT4 1.00 SUCCESS EVENTS LOOPPRT5-1.00

. SUCCESS EVENTS LOOPPRT6 1.00 SUCCESS EVENTS GTRPPt1 1.00 SUCCESS EVENTS GTRPP;l 1.00 SUCCESS EVENTS GTRPRTS 1.00 SUCCESS EVENTS GTRPRT6

.999

$UCCESS EVENTS GTRPRT7 1.00 SUCCESS EVENTS LLPRT1 1.00 SUCCESS EVENTS LLPRT2 1.00 SUCCESS EVENTS LLPRT3 1.00 SUCCESS EVENTS BUS _0$P_1 1.00 AC POWER WITH OFFSITE 147,148,149 FAIL DS_ LOC 1.00 1/4 ARV OR 1/3 STM DNP - LOCAS LOCPRT1

.000 SUCCESS EVENTS MF_ATW 1.00 FRACTION OF TRANSIENTS MAIN FEED UNAVAIL UNTIL TURBINE TRIP OEC_LSC 1.00 OP ACTION - FIREWATER TO CCP OIL COOLER ORE _SB0 1.04 OP ACTION - RESTORE EQUIP & SUPPORT SYSTEMS ORT _ALL 1.23 DP ACTION - REFILL THE RWST PL_ATW 1.00 POWER LEVEL GREATER THAN 60 PERCENT XCC_S24 1.06 CORE UNCOVERED PRIOR TO POWER RECOVERY AT 24 HRS (SEALLOCA)

YHR_SB2 1.00 POWER RECOV FAILURE PROB AT 24 HRS /NO RECOVERY AT 2 HRS i

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Ammwr R

i Page 1 August 17, 1993 ZION STAT!DN

.IMPORTANCE OF EACH PRT NODE QUANTIFICATION I

Corponent '

R. Achievement Description Worth AC LSC 1.00 ALIGN CHARGING PUMP SUCTION TO THE RWST AFI_STR1 1.00 CLOSE MOV FW0050 & 051 ALL POWER AVAIL ATW AT 1.64 1/1 AUX FEED TDP OR 2/2 MDP TO 1/4 SGS (OPEN THRTL VALVES)

~

AFW STR 5 1.00 1/3 AUX FEED PMPS TO 4/4 SG 147 AVAIL

~ -

AFW LSP 4 21.7-1/3 AUX FEED PMPS TO 4/4 SG OR 1/4 SG W/0A 148 & 149 AVAIL

_i AFWLSP[6 5.24 1/3 AUX FEED PMPS TO 4/4 SG OR 1/4 SG W/0A 148 AVAIL

~

AFW LSP_7 4.77 1/3 AUX FEED PMPS TO 4/4 SG OR 1/4 SG W/0A 149 AVAIL AFW LSP_8 10.2 1/3 AUX FEED PMPS TO 4/4 SG NO POWER

-p AFW SBOTD 1.10 1/1 AUX FEED TDP TO 4/4 SGS

~

AFW TRA i 13.3 1/3 AUX FEED PMPS TO 4/4 SG OR 1/4 SG W/0A ALL POWER

~ -

AFW TRA 6 1.04 1/3 AUX FEED PMPS TO 4/4 SG OR 1/4 SG W/0A 148 AVAIL

~ ~

AFW TRA 7 1.94 1/3 AUX FEED PMPS TO 4/4 SG OR 1/4 SG W/0A 149 AVAIL

~ ~

AFW TRA 8 1.09 1/3 AUX FEED PMPS TO 4/4 SG NO POWER ALT [MFWI 1.00 1/3 MFW TO 1/4 SGs & 1/4 CBPs - LOSS OF 011-1 OR LOSP

[

AM ATW 1.00 ATWS MIT! GATING STSTEM ACTUATION CIRCUlf

.l BUS _LSP_1 585.

AC POWER WITH LOSP 147,148,149 FAIL BUS LSP 4 117.

AC POWER WITH LOS:' 148,149 FAIL BUS [DSP[1 280.

AC POWER WITH DLOSP 147,148,149 FAIL BUS _DSP,2 4.15 AC POWER WITH DLOSP 147,148 FAIL BUS _DSP_3l 2.59 AC POWER WITH DLOSP 147,149 Fall BUS DSP_4 61.8 AC POWER WITH DLOSP 148,149 FAIL BUS,DSP,5 1.07 AC POWER WITH DLOSP 147 FAILS BUS _DSP_6 1.07 AC POWER WITel DLOSP 148 FAILS BUS _DSP_7 1.02 AC POWER WITH DLOSP 149 FAILS BUS OSP_1 4.922E+04 AC POWER WITH OFFSITE 147,148,149 FAIL BUS _0SP_3 189.

AC POWER WITH OFFSITE 147,149 FAIL BUS 0SP_4 2.206E+03 AC POWER WITH OFFSITE 148,149 FAIL BUS _0SP,5 5.57 AC POWER WITH OFFSITE 147 FAILS CB,1 1.00 1/4 COND BOOSTER PMPS TO 1/4 SGS - LOSS OF 011-1 OR LOSP CCP_ SLO _1 8.16 1/2 CCPs INJECTING TO 2/4 C LEGS ALL POWER

[

CCP_ SLO _4 1.00 1/2 CCPs INJECTING TO 2/4 C LECS 148 & 149 AVAIL CCP SLO 8 1.00 1/2 CCPs INJECTING TO 2/4 C LEGS NO POWER-CCW~

~

1.00 toss OF COMPONENT COOLING WATER

t CCW DLP 7 1.50 COMPONENT COOLING WATER W/DLOSP 148&149 Fall CCW[ LOC [1 1.00 COMPONENT COOLING WATER W/LOCA-ALL POWER

.[

CCW TRA_1 81.9 COMPONENT COOLING WATER W/TRAN ALL POWER i

Cl_ALL 1.00 CONTAINMENT.!$0LATION (ESFAS SUCCESS, SPRAY ACTUATED)

?

Cl,3 1.00 CONTAINMENT ISOLATION (ESTAS FAILED, SPRAT ACTUATED).

CSI,1

.882 1/3 CONTAINMENT SPRAY PUMPS ALL POWER i

CSI 5 1.10 1/3 CONTAINMENT SPRAY PUMPS 147 AVAIL

~

cst 8 1.00 1/3 CONTAINMENT SPRAY PUMPS NO POWER AVAIL DCB[LSP_1 1.102E+04 DC POWER WITH LOSP 011 1,111,112 FAIL DCB_LSP,,3 192.

DC POWER WITH LOSP 011-1,112 FAIL i

DCB LSP 4 169.

DC POWER WITH LOSP 111,112 FAIL DCB[0 SPI 1.309E+04 DC POWER W/DS 011-1,111,112 FAIL ALL POWER I

DCB,0$P13 2.281E+03 DC POWER W/OS 011 1,112 FAIL *1471149 AVAIL DCB_0SP17 2.233E+03 DC POWER W/OS 111,112 FAIL-148&149 AVAIL DS DC 1.01 1/4 ARV OR 1/12 STM DMP - LOSS DC

~

DS LOC.

1.00 1/4 ARV OR 1/3 STM DNP - LOCAS

~

DS STR 152.

2/3 ARV DN INTACT SGs OR 2/3 STM DMP-EC LSC 1.00 1 FIREWATER PMP & VALVES TO OPERATING CCP - ALL POWER ESF_NOA_1 77.2 ESFAS NO OPER ACTION-BOTH TRAINS Fall ESF WOA 1 63.2 ESFAS W/0P ACTION-BOTH TRAINS FAIL ESFMAN[1 1.19 ESFAS MANUAL; HDW ONLT-BOTH TRAINS Fall i

~

FC11 1.14 1/5 FAN COOLERS ALL POWER-FC1X 1.00 1/5 FAN COOLERS ALL POWER WITH RESTORATION (FC11+0RE_SBO)

FC15

.978 1/5 FAN COOLERS 147 AVAIL FC18 1.00 1/5 FAN COOLERS NO POWER FC21 1.00 2/5 FAN C00 Leks ALL POWER HPI_ATW 1.00 HIGH PRESSURE INJECTION ASSUMED TO FAIL - ATWS i

k

j l

Page 2 August 17, 1993 HPI LL_1 1.00 1/4 HIGH PRESSURE INJ PMPS To 2/3 C LEGS ALL POWER (COND)

HPI_LL,8 1.00 1/4 HIGH PRESSURE INJ PMPS 70 2/3 C LEGS NO POWER HPI,LSP_1 1.53 1/4 HIGH PRESSURE INJ PMPS 70 2/4 C LEGS ALL POWER HPl_LSP,5 1.12 1/4 HIGH PRESSURE INJ PMPS TO 2/4 C LEGS 147 AVAIL.

j HPI_LSP.6 1.00 1/4 HIGH PRESSURE INJ PMPS TO 2/4 C LEGS 148 AVAIL HPI TRA 1 1.30 1/4 HIGH PRESSURE INJ PMPS To 2/4 C LEGS ALL POWER _

HPlTRA[8 1.00 1/4 HIGH PRESSURE INJ PMPS TO 2/4 C LEGS NO POWER

~

HPR LOC _1 1.05 1/4 HIGH PRESSURE RECIRC 70 2/3 C LECS ALL POWER (COND)

HPR SLOS1 1.06 1/2 SIPS RECIRC TO 2/4 C LEGS ALL POWER (COND)

HPR[SLOS8 1.00 1/2 SIPS RECIRC TO 2/4 C LEGS NO POWER HPR TRA i 1.13 1/4 HIGH PRESSURE RECIRC TO 2/4 C LEGS ALL POWER (COND)

~

HPR,LSP[1 1.04 1/4 HIGH PRESSURE RECIRC TO 2/4 C LEGS ALL POWER (COND)

}

HPR TRA 2 1.02 1/4 HIGH PRESSURE RECIRC TO 2/4 C LEGS 147 & 148 AVAIL

^

HPR[TRA,3 1.02 1/4 HIGH PRESSURE RECIRC TO 2/4 C LEGS 147 & 149 AVAIL

~

HPR LDC 3 1.01 1/4 HIGH PRESSURE RECIRC TO 2/4 C LECS 1478149 AV (COND) d

~ -

HPR TRA 4 1.01 1/4 HIGH PRESSURE REclRC TO 2/4 C LEGS 148 & 149 AVAIL 5

HPR TRA 6 1.00 1/4 HIGH PRESSURE RECIRC TO 2/4 C LEGS 148 AVAIL HPR TRA 7 1.00 1/4 HIGH PRESSURE RECIRC TO 2/4 C LEGS 149 AVAIL l

~ ~

~ ~

HPR TRA 8 1.00 1/4 HIGH PRESSURE REclRC TO 2/4 C LEGS NO POWER HPR[$80~

2.10 1/2 CCPs RECIRC 70 2/4 C LEGS ALL POWER AVAILABLE (COND)

LPI LL 1 77.1 1/2 LOW PRESSURE INJ PMPS 70 2/3 C LEGS ALL POWER i

LPl[LL[2 1.07 1/2 LOW PRESSURE INJ PMPS TO 2/3 C LEGS 147 & 148 AVAIL LPI_LL 3 1.07 1/2 LOW PRESSURE INJ PMPS To 2/3 C LEGS 147 & 149 AVAIL LPI LL 8 1.00 1/2 LOW PRESSURE INJ PMPS TO 2/3 C LEGS NO POWER LPlML[1 90.0 1/2 LOW PRESSURE INJ PMPS TO 2/4 C LEGS ALL POWER (COND)

I

~

LPI_ML_4 1.00 1/2 LOW PRESSURE INJ PMPS TO 2/4 C LEGS 148 & 149 AVAIL LPI ML 5 -

1.00 1/2 LOW PRESSURE INJ PMPS To 2/4 C LEGS 147 AVAIL LPlML[8 1.00 1/2 LOW PRESSURE INJ PMPS 70 2/4 C LEGS No POWER

~

LPI_Sto_1 555.

1/2 RHR PUMPS ON MINIFLOW ALL POWER LPI_ SLO _8 1.00 1/2 RHR PUMPS ON MINIFLOW WO POWER LPR LL_1 77.1 1/2 LOW PRESSURE RECIRC TO 1/3 C LEGS ALL POWER (COND)

LPR_LL_2 1.07 1/2 LOW PRESSURE RECIRC TO 1/3 C LEGS 149 AVAIL LPR,LL_3 1.07 1/2 LOW PRESSURE RECIRC TO 1/3 C LEGS 148 AVAIL LPR_ML_1 90.0 1/2 LOW PRESSURE RECIRC TO 2/4 C LEGS ALL POWER (COND)

LPR SLO _1 8.52 1/2 LOW PRESSURE RECIRC TO 2/4 C LEGS ALL POWER (COND)

LPR_ SLO _2 1.00 1/2 LOW PRESSURE RECIRC To 2/4 C LEGS 149 AVAIL i

MF ATW 1.00 FRACTION OF TRANSIENTS MAIN FEED UNAVAIL UNTIL TURBINE TRIP OAC LSC 1.00 OP ACTION

• ALIGN CHARGING SUCTION TO RWST OCC LCW 1.00 OP ACTION - RESTORE COMPONENT.C00L1hG WATER

~

~

OAF $TR 1.00 OP ACTION - ISOLATE FEED TO RUPT SG-

~

00S SLO 4.32 OP ACTION SG DEPRES FOR PRIM COOLING (00Sta) i

~

CDS MLo 1.04 OP ACTION - SG DEPRES FOR PRIM COOLING (0051b)

~

005 STR 152.

OP ACTION k SG DEPRES FOR PRIM COOLING (ODS2) 00S ALL 1.00 OP ACTION - SG DEPRES FOR PRIM COOLING (0053)

~

~

OEC LSC 1.00 OP ACTION FIREWATER To CCP OIL COOLER OH(ALL 1.04 OP ACTION - ESTAB CCW TO RHR HEAT EXCHANGER 018 ISL 1.00 OP ACTION - ISOLATE RHR BREACH

~

OIR,STR 152.

OP ACTION - MINIM 1ZE ECCS FLOW ONC SLO 1.40 OP ACTION - ESTAB NORMAL CHARGING (ONC2)

~

OPR ALL 1.85 OP ACTION - DEPRES PRIM WITH PR2R PORVS ORC HPR 2.25 OP ACTION - ESTAB HIGH PRESSURE ECC RECIRC

'l

~

ORC LPR 97.4 OP ACTION - ESTAB LOW PRESSURE ECC RECIRC

,l

~

ORC LLS 76.8 OP ACTION - ESTAB LOW PRESSURE ECC RECIRC (LLOCA W/ SPRAY)

~

ORE [580 2.34 OP ACTION - RESTORE EQUIP & SUPPORT SYSTEMS ORF ALL 1.07 OP ACTION - RESTORE CB 1/OR MFW.

t ORS ALL 1.01 OP ACTION - RAPID SG DEPRES FOR CB INJ (ORS 1)

~

~

ORS SBD 1.05 OP ACTION - RAP!0 SG DEPRES FOR CB INJ (ORS 2)

ORT _ALL 5.78 OP ACTION - REFILL THE RWST ORT LLO 1.00 RWST REFILL NOT POS$1BLE FOR LARGE LOCA WITH CURRENT EOPs OSC LCW 1.00 OP ACTION - STOP CCW PUMPS

~

OS! ALL 2.87 OP ACTION - INITIATE SAFETY INJECTION Osl[NOESF 1.00 OP ACTION - INITIATE SAFETY INJECTION (ESFAS HDW FAILED)

OSW LSW 1.00 OP ACTION RESTORE SW AND ALIGN CCW r

OTT[ATW 1.34 OP ACTION - TURB TRIP CR CLOSE MSIVS PL_ATW 1.00 POWER LEVEL GREATER THAN 60 PERCENT PRV 1 2.01 1/2 PRZR PORVS - ALL POWER 3

~

RMX ALL_2 1.02 1/2 RHR HEAT EXCHANGERS 148 FAILED (1/1)

RMX_ALL_3 1.02 1/2 RHR HEAT EXCHANGERS 149 FAILED (1/1) r

i 1

1 Page 3 i

August 17, 1993 l

RHX,ALL_5 1.07 2/2 RKR HEAT EXCHANGERS 148&149 AVAILABLE RHX_ SLO _5 1.42 2/2 RHR HEAT EXCHANGERS 148&149 AVAILABLE (COND)

RHX ALL 6 1.00 2/2 RHR HEAT EXCHANGERS 148 OR 149 FAILED RTK[ALL-1.02 EQUIPMENT TO REFILL THE RWST RTK_STR 5.38 EQUIPMENT TO REFILL THE RWST (SGTR) l RTK_ LOC 1.25 EQUIPMENT TO REFILL THE RWST FOR LOCAs (RTK_ALL+0.25)

RTK_ FAIL 1.00 EQUIPMENT TO REFILL THE RWST (POWER UNAVAILABLE)

RXT TRA 638.

FAILURE OF REACTOR TRIP SAC [0SP2 77.2 SAF ACT 17,18,19 FAIL-ONE ESFAS AVAIL SAC _0SPT 753.

SAF ACT 18,19 FAIL-BOTH ESTAS AVAIL (W/RESTORAtl0N)

SAC _0$P8 77.2 SAF ACT 18,19 FAIL-ONE ESFAS AVAIL SAC _0SP12 2.47 SAF ACT 18 FAILS-ONE ESFAS AVAll SAC,0SP14 2.40 SAF ACT 19 FAILS-ONE ESFAS AVAIL SAC _ MAN 1.13 MANUAL ACTUATION OF SAFEGUARDS EQUIPMENT (RE_SBo+0RE_SBO) i SAC _ Fall 1.00 MANUAL ACTUATION OF EoulPMENT NOT MODELED FOR LARGE LOCA j

$80_1 1.00 LOSP, AC UNAVAILABLE, TRANSFER TO STATION BLACKOUT SIP _ SLO _1 1.02 1/2 SAFETY INJECTION PMPS To 2/4 C LEGS ALL POWER 51P_ SLO,8 1.00 1/2 SAFETY INJECTION PMPS TO 2/4 C LEGS NO POWER SLO _1 1.04 CONSEQUENTIAL SMALL LOCA NO SW/CCW (EC_LSCX+0EC_LSC+$LO_2)

SWS 1.00 LOSS OF SERVICE WATER I

SWS_DLP_1 231.

SERVICE WATER W/DLOSP-ALL POWER l

SWS_DLP_2 12.8 SERVICE WATER W/DLOSP-147 FAILED SWS_DLP_3 13.2 SERVICE WATER W/DLOSP-148 FAILED l

SWS_DLP_4 13.1 SERVICE WATER W/DLOSP-149 FAILED SWS_DLP_5 1.59 SERVICE WATER W/DLOSP-147&i48 FAIL SWS_DLP_6 1.59 SERVICE WATER W/DLOSP-1478149 FAIL SWS_DLP_7 1.60 SERVICE WATER W/DLOSP-148&149 FAIL SWS_ LOC _1 9.64 SERVICE WATER W/LOCA-ALL POWER SWS_LSP_1 567.

SERVICE WATER W/LOSP-ALL POWER SWS_TRA_1 1 73.

SERVICE WATER W/TRAN-ALL POWER TT_1 1.06 CLOSE 4/4 STOP OR 4/4 GOV. VALVES FOR TURBINE TRIP 2

XCC_S2 1.02 CORE UNCOVERED PRIOR TO POWER RECOVERY AT 2 HRS (SEALLOCA)

XCC S16 1.01 CORE UNCOVERED PRIOR TO POWER RECOVERY AT 16 HR$ (SEALLOCA)

XCC_S24 2.33 CORE UNCOVERED PRIOR TO POWER RECOVERY AT 24 HR$ (SEALLOCA)

XHR_S2 1.02 POWER RECOV FAILURE PROB AT 2 HRS (TD FAIL)

XHR $24 2.10 POWER RECOV FAILURE PROB AT 24 HRS (TD & DS)

YHR[SB2 1.00 POWER RECOV FAILURE PROB AT 24 HRS /NO RECOVERY AT 2 HRS DLOOP-SS1 1.00 SUCCESS EVENTS TRAN S$1

.998 SUCCESS EVENTS l

LOC-S$1

.270 SUCCESS EVENTS l

DLOOPSWS-S$198 1.00 SUCCESS EVENTS DLOOPBUS-SS198

.758

$UCCESS EVENTS LOOP-SS198 1.00 SUCCESS EVENTS DLOOP-SS200

.999 SUCCESS EVENTS LOOP-SS200

.998 SUCCESS EVENTS GTR-SS105 1.00 SUCCESS EVENTS GTR-SS117 1.00 SUCCESS EVENTS LDC-SS22 1.00 SUCCESS EVENTS MLPRT1 1.00 SUCCESS EVENTS MLPRT2

.988 SUCCESS EVENTS MLPRT3

.969 SUCCESS EVENTS SLPRT1

.996 SUCCESS EVENTS SLPRT3 1.00 SUCCESS EVENTS SLPRT4 1.00 SUCCESS EVENTS SLPRT5

.980 SUCCESS EVENTS l

SGTRPRT1

.993 SUCCESS EVENTS SGTRPRT3

.995 SUCCESS EVENTS SGTRPRT4

.834 SUCCESS EVENTS SGTRPRTB

.882 SUCCESS EVENTS DLOOPPRT2 1.00 SUCCESS EVENTS DLOOPPRT6

.997 SUCCESS EVENTS l

DLOOPPRT7

.968 SUCCESS EVENTS DLOOPPRTS

.956

$UCCESS EVENTS l

CLOOPPRT10

.886 SUCCESS EVENTS l

DLOOPPRT14

.999 SUCCESS EVENTS l

DLOOPPRT17 1.00 SUCCESS EVENTS l

DLOOPPRT19 1.00 SUCCESS EVENTS l

LOOPPRT2

.999 SUCCESS EVENTS

?

Pege 4 AugLat 17, 1993 P

LOOPPRT3 1.00 SUCCESS EVEN1E LOOPPRT4 1.00 SUCCESS EVEWTS LOOPPRTS 1.00 SUCCESS EVENTS LOOPPRT6 1.00 SUCCESS EVENTS GTRPRT1 1.00 SUCCESS EVENTS GTRPRT2 1.00 SUCCESS EVENTS GTRPRT5 1.00 SUCCESS EVENTS

-I GTRPRT6

.999 SUCCESS EVENTS GTRPRT7 1.00 SUCCESS EVENTS LLPRT1 1.00 SUCCESS EVENTS LLPRT2 1.00 SUCCESS EVENTS LLPRT3

.836 SUCCESS EVENTS BUS,0$P_1 4.922E+04 AC POWER WITH OFFSITE 147,148,149 FAIL DS_ LOC 1.00 1/4 ARV OR 1/3 STM DMP - LOCAS LDCPRT1

.000 SUCCESS EVENTS i

MF ATW 1.00 FRACTION OF TRANSIENTS MAIN FEED UNAVAIL UNTIL TURBINE TRIP

+

OEC LSC 1.00 OP ACTION - FIREWATER TO CCP OIL COOLER

[

~

J ORE,$BO 2.34 DP ACTION - RESTORE EQ' IP& SUPPORT SYSTEMS ORT _ALL 5.78 OP ACT10N - PEFILL THE RWST PL ATW 1.00 POWER LEVEL GREATER THAN 60 PERCENT XCC S24 2.33 CORE UNCOVERED PRIOR TO POWER RECOVERY AT 24 HRS (SEALLOCA)

~

YHR SB2 1.00 POWER RECOV FAILURE PROB AT 24 HRS /NO RECOVERY AT 2 HR$

1 t

I l

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4 k

,r September 17, 1992 Mr. T. P. Joyce

SUBJECT:

Zion IPE Interim Deployment Tool - Revision 1 Enclosed for your inforntion and use is Revision 1 to the Zion Individual Plant Examination (IPE) Interim Deployment Tool. This revision incorporates comments received from Zion Station personnel on the original version of this tool.

The tool provides summary IPE results for use by station personnel in:

1.

Maintenance prioritization while at power; 2.

Maintenance prioritization during an outage; 3.

Modification prioritization; and 4.

Operator training prioritization.

Although the tool has been written to be self-explanatory and includes a number of examples on its use, a short training session on how to apply the tool could be provided upon request.

The Zion IPE can also be applied to other situations on an "upon request" basis. Attachment A contains a list of those applications.

Should you have any questions on this matter, please do not hesitate to contact Shannon Shaneyfelt (DG extension 7483) op me (DG extension 7489).

lj

\\

7 Ge ge

. Klopp PRA/HF Group - NED GTK/BFM Enclosure Attachment cc:

G.P. Wagner R.P..Tuetken D.B. Wozniak F.G. Lentine K.A. Ainger G.E. Trzyna J.E. LaFontaine K.J. Hansing R.J. Budowle J.J. Madden L.J. Zech D.G. Robinson

'N.P. Smith S. Shaneyfelt B.F. Momsen X. Polanski

?

ATTACHMENT A "UPON REQUEST" APPLICATIONS FOR ZION IPE The Zion IPE can provide a risk perspective in the following situations on an "upon request" basis:

TECH SPEC CHANGES, LCO EXEMPTIONS, A0T'S, LER'S GENERIC LICENSING ISSUES UNIQUE EQUIPMENT OUTAGES SAFETY SYSTEM AVAILABILITY GOALS (SETTING / DEVIATIONS)

SPECIFIC MAINTENANCE RULE IMPLEMENTATION ISSUES MODIFICATION PRIORITIZATION ALLOWED COMBINATIONS OF UNAVAILABLE EQUIPMENT SIGNIFICANT CHANGES IN EQUIPMENT AVAILABILITY f

Should a risk perspective be needed in these situations, please contact George T. Klopp, the PRA/HF Group Leader.

t V

n