ML021150597

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Internal Event Delta CDF Derivation
ML021150597
Person / Time
Site: Harris Duke Energy icon.png
Issue date: 04/25/2002
From:
NRC/RGN-II
To:
Shared Package
ML021150597 List:
References
EA-02-067 IR-02-007
Download: ML021150597 (3)
v • d • e


Text

INTERNAL EVENTS DELTA CDF DERIVATION DELTA CDF DERIVATION FROM DOMINANT ACCIDENT SEQUENCES FOR INTERNAL EVENTS 1.90E-01 TOTAL LOSS OF MAIN FEEDWATER [INIT EVENT]

MLMF 1

3.40E-04 CCF 3 OF 3 AFW PUMP FTS FCCFPUMPS 1.00E-01 MOV 1RH-63 RHR B TO CSIP SUCTION FTO HMV1RH63TN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 8.5E-09 2.01E-03 6.9 KV BUS 1B-SB FAILS [INIT EVENT]

JBS1B_SBFN 2

2.20E-03 AFW MD PUMP A FTS FPM1A-SAFS 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 5.8E-09 2.01E-03 6.9 KV BUS 1B-SB FAILS [INIT EVENT]

JBS1B_SBFN 3

1.55E-03 CHECK VALVE 1AF-16 MD PUMP A DISCHARGE FTO FCVAF-16TN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 4.1E-09 2.01E-03 6.9 KV BUS 1B-SB FAILS [INIT EVENT]

JBS1B_SBFN 4

1.40E-03 HYDRAULIC VALVE 1AF-19 MD PUMP A DISCH PCV TRANSFER CLOSED FHVAF-19FN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 3.7E-09 2.01E-03 6.9 KV BUS 1B-SB FAILS [INIT EVENT]

JBS1B_SBFN 5

1.47E-03 PRES TRANS PT-2150A MD PUMP A DISC FAILS LOW PT2150AFN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS

1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 3.9E-09 4.80E-02 CCF 3 OF 3 AIR COMPRESSORS FAIL TO RUN ACCFC%FTR 6

3.40E-04 CCF 3 OF 3 AFW PUMP FTS FCCFPUMPS 1.00E-01 MOV 1RH-63 RHR B TO CSIP SUCTION FTO HMV1RH63TN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 2.2E-09 6.18E-01 IA COMPRESSOR 1A-NNS FAILS TO RUN ACP1ANS%FN 7

6.18E-01 IA COMPRESSOR 1B-NNS FAILS TO RUN ACP1BN%SFN 5.40E-02 IA COMPRESSOR 1C FAILS TO START ACPRACOMNN 3.40E-04 CCF 3 OF 3 AFW PUMP FTS FCCFPUMPS 1.00E-01 MOV 1RH-63 RHR B TO CSIP SUCTION FTO HMV1RH63TN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 9.3E-10 2.40E-02 CCF 2 OF 3 AIR COMPRESSORS 1A & 1C FAIL TO RUN ACCFAC%FR 8

6.18E-01 IA COMPRESSOR 1B-NNS FAILS TO RUN ACP1BN%SFN 3.40E-04 CCF 3 OF 3 AFW PUMP FTS FCCFPUMPS 1.00E-01 MOV 1RH-63 RHR B TO CSIP SUCTION FTO HMV1RH63TN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 6.7E-10 2.40E-02 CCF 2 OF 3 AIR COMPRESSORS 1B & 1C FAIL TO RUN ACCFBC%FR 9

6.18E-01 IA COMPRESSOR 1B-NNS FAILS TO RUN ACP1BN%SFN 3.40E-04 CCF 3 OF 3 AFW PUMP FTS FCCFPUMPS 1.00E-01 MOV 1RH-63 RHR B TO CSIP SUCTION FTO HMV1RH63TN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 6.7E-10 2.40E-02 CCF 2 OF 3 AIR COMPRESSORS 1B & 1A FAIL TO RUN ACCFAB%FR 10 6.18E-01 IA COMPRESSOR 1C-NNS FAILS TO RUN ACP1CN%SFN 3.40E-04 CCF 3 OF 3 AFW PUMP FTS FCCFPUMPS

1.00E-01 MOV 1RH-63 RHR B TO CSIP SUCTION FTO HMV1RH63TN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 6.7E-10 2.01E-03 6.9 KV BUS 1B-SB FAILS [INIT EVENT]

JBS1B_SBFN 11 5.50E-03 AFW MD PUMP A OOS FTMMDPA 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 5.00E-01 CONDITIONAL PROBABILITY SAFETY TRAIN B PROTECTED X-PROTB 1.40E-01 RETURN MD PUMP A TO SERVICE RESTORE 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 1E-09 1.66E-03 LOSS OF DC BUS DP-1B-SB BY SHORT CIRCUIT OF BATTERY [INIT EVENT DBA1B_SBTN 12 5.50E-03 AFW MD PUMP A OOS FTMMDPA 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 5.00E-01 CONDITIONAL PROBABILITY SAFETY TRAIN B PROTECTED X-PROTB 5.00E-02 MANUALLY CLOSE MD PUMP B BKR CLOSE BKR 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 3E-10 1.66E-03 LOSS OF DC BUS DP-1B-SB BY SHORT CIRCUIT OF BATTERY [INIT EVENT DBA1B_SBTN 13 2.20E-03 AFW MD PUMP A FTS FPM1A-SAFS 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 5.00E-02 MANUALLY CLOSE MD PUMP B BKR CLOSE BKR 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 2.4E-10 1.23E-03 DC DISTRIBUTION PNL DP-1B-SB FAILS [INIT EVENT]

DPA1B-SBFN 14 5.50E-03 AFW MD PUMP A OOS FTMMDPA 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 5.00E-01 CONDITIONAL PROBABILITY SAFETY TRAIN B PROTECTED X-PROTB 5.00E-02 MANUALLY CLOSE MD PUMP B BKR CLOSE BKR 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 2.2E-10 1.66E-03 LOSS OF DC BUS DP-1B-SB BY SHORT CIRCUIT OF BATTERY [INIT EVENT DBA1B_SBTN 15 2.20E-03 AFW MD PUMP A FTS FPM1A-SAFS

1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 5.00E-02 MANUALLY CLOSE MD PUMP B BKR CLOSE BKR 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 2.4E-10 1.23E-03 DC DISTRIBUTION PNL DP-1B-SB FAILS [INIT EVENT]

DPA1B-SBFN 16 2.20E-03 AFW MD PUMP A FTS FPM1A-SAFS 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 5.00E-02 MANUALLY CLOSE MD PUMP B BKR CLOSE BKR 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 1.8E-10 1.66E-03 LOSS OF DC BUS DP-1B-SB BY SHORT CIRCUIT OF BATTERY [INIT EVENT DBA1B_SBTN 17 1.55E-03 CHECK VALVE 1AF-16 MD PUMP A DISCHARGE FTO FCVAF-16TN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 5.00E-02 MANUALLY CLOSE MD PUMP B BKR CLOSE BKR 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 1.7E-10 1.66E-03 LOSS OF DC BUS DP-1B-SB BY SHORT CIRCUIT OF BATTERY [INIT EVENT DBA1B_SBTN 18 1.47E-03 PRES TRANS PT-2150A MD PUMP A DISC FAILS LOW PT2150AFN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 5.00E-02 MANUALLY CLOSE MD PUMP B BKR CLOSE BKR 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 1.6E-10 1.66E-03 LOSS OF DC BUS DP-1B-SB BY SHORT CIRCUIT OF BATTERY [INIT EVENT DBA1B_SBTN 19 1.40E-03 HYDRAULIC VALVE 1AF-19 MD PUMP A DISCH PCV TRANSFER CLOSED FHVAF-19FN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 5.00E-02 MANUALLY CLOSE MD PUMP B BKR CLOSE BKR 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 1.5E-10 1.23E-03 DC DISTRIBUTION PNL DP-1B-SB FAILS [INIT EVENT]

DPA1B-SBFN 20 1.55E-03 CHECK VALVE 1AF-16 MD PUMP A DISCHARGE FTO FCVAF-16TN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 5.00E-02 MANUALLY CLOSE MD PUMP B BKR CLOSE BKR 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL

1.3E-10 1.23E-03 DC DISTRIBUTION PNL DP-1B-SB FAILS [INIT EVENT]

DPA1B-SBFN 21 1.47E-03 PRES TRANS PT-2150A MD PUMP A DISC FAILS LOW PT2150AFN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 5.00E-02 MANUALLY CLOSE MD PUMP B BKR CLOSE BKR 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 1.2E-10 2.6E-08 BASE CASE CDF FOR INTERNAL EVENTS FROM DOMINANT CUTSETS 3E-8/1.32E-2

  • 1.0 = 2.27E-6 = NON-CONFORMING CASE 3E-8 = BASE CASE 2.27E 3E-8 = 2.24E-6 = DELTA CDF DELTA CDF DERIVATION FOR LOCAS FOR INTERNAL EVENTS LOCAs WILL ALSO BE CONSIDERED TO ENSURE THE DOMINANT ACCIDENT SEQUENCES ARE ENCOMPASSED THE LICENSEE USES A SLIGHTLY DIFFERENT METHODOLGY IN THEIR FULL SCOPE MODEL TO DERIVE LOCA INITIATING EVENT PROBABILITIES AND DEFINE SUCCESS CRITERIA. FOR PURPOSES OF THIS ANALYSIS, THEIR MB & LBLOCA FREQUENCIES ARE A MAGNITUDE CONSERVATIVE WHEN EVALUATED AGAINST NUREG/CR 5750 INFORMATION. THEREFORE, A 5E-6 IE FREQUENCY IS ASSIGNED TO THE COMPOSITE LB & MB LOCA NO CREDIT FOR ALTERNATE ECCS INJECTION OR RECIRCULATION METHODS WILL BE CREDITED FOR LB & MBLOCA. CREDIT WILL BE GIVEN FOR S2 & S1 LOCAS.

A 4E-5 WILL BE ASSIGNED TO THE LICENSEE'S S2 LOCA IE FREQUENCY AND 5E-4 TO THE LICENSEE'S S1 LOCA FREQUENCY. THIS IS A MAGNITUDAL SHIFT UPWARDS FOR S2 AND A MAGNITUDAL SHIFT DOWNWARDS FOR S1. S2 LOCAS ARE SMALL BREAK LOCAS AND S1 LOCAS ARE ACTUALLY LEAKS WITHIN THE CAPABILITY OF THE CHARGING SYSTEM (NOT REALLY LOCAS).

FROM THE LICENSEE'S BASIC EVENTS AND IPE DESCRIPTION OF THE LHSI SYSTEM A FAILURE PROBABILITY FOR ONE TRAIN OF LPR CAN BE DERIVED. THIS IS 5E-2. RATHER THAN LOOK AT INDIVIDUAL CUTSETS THAT WOULD INVOLVE THE BASIC EVENTS THAT CAUSE RANDOM FAILURE OF TRAIN B. THIS 5E-2 SURROGATE WILL BE APPLIED.

1.32E-02 MOV 301 FAIL TO OPEN 1.32E-02 MOV 311 FAIL TO OPEN 1.40E-03 LHSI PUMP B FAIL TO START 4.32E-04 LHSI PUMP B FAIL TO RUN 4.20E-03 HEAT EXCHGR PLUGS 2.48E-03 HEAT EXCHGR LEAKS 3.00E-03 MOV CCW MOV 167 TO SHELL OF RHR HEAT EXCHGR FAILS CLOSED 1.10E-02 AIR OP FLOW CONTROL VALVE 66 FAILS CLOSED 7.54E-04 AIR OP HEAT EXCHGR BYPASS FLOW CTRL VALVE 58 FAILS OPEN 4.97E-02 SURROGATE FOR LPR TRAIN B 5.00E-06 LARGE BREAK/MEDIUM BREAK LOCA

%A 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 5.00E-02 SURROGATE FOR FAILURE OF LPR TRAIN B LPR TRAIN B 3.3E-09 NONCONFORMING CDF = [3E-9] / 1.32E-2 = 2.27E-7 CONFORMING CDF = 3E-9 DELTA CDF = 2.27E 3E-9 = 2.24E-7 4.00E-05 SMALL LOCA S2

%S2 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 5.00E-02 SURROGATE FOR FAILURE OF LPR TRAIN B LPR TRAIN B 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 2.6E-09 3E-9 / 1.32E-2 = 2.27E-7 = NONCONFORMING CDF 3E-9 = CONFORMING CDF 2.27E 3E-9 = 2.24E-7 = DELTA CDF THE CRITICAL S1 EVENT TREE INVOLVING THE PERFORMANCE DEFICIENCY WILL BE THOSE ASSOCIATED WITH:

1) S1 * /HHSI * /SSHR * /COOLDOWN
  • HPR/LPR
2) S1 * /HHSI * /SSHR
  • COOLDOWN
  • HPR
3) SI * /HHSI
  • SSHR * /BLEED
  • HPR
  • ALT INJ SUCCESSES ARE SET TO 1.0 & ARE DENOTED BY A /

COOLDOWN FAILURE IS DOMINATED BY OPERATOR ACTION FAILURE AND IS SET TO 1.5E-3 FROM LICENSEE'S FULL SCOPE MODEL BASIC EVENT OPER-9 [FAILURE TO INITIATE RCS COOLDOWN TO USE LPSI/RHR]

RHR FAILURE CAN BE FOR ONLY THOSE COMPONENTS THAT ARE NOT COMMON TO THE HPR FUNCTION, THESE ARE THE SUCTION VALVES FROM THE RCS HOT LEG RH-39 & RH-40 WITH FAILURE PROBABILITIES OF 4.65E-2 SEQUENCE #1 5.00E-04 S1 SBLOCA

%S1 9.30E-02 FAILURE OF EITHER SUCTION VALVE RHR 5.00E-02 HPR/LPR TRAIN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 3.1E-09 SEQUENCE #2 5.00E-04 S1 SBLOCA

%S1 1.50E-03 OPERATOR FAILURE TO COOLDOWN AND DEPRESSURIZE CLDN 1.00E-01 SURROGATE FOR FAILURE OF ACTIVE COMPONENTS FOR HPR B HPR TRAIN B 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 9.9E-11 SEQUENCE #3 5.00E-04 S1 SBLOCA

%S1 1.00E-03 SURROGATE FOR LOSS OF MFW & AFW NO SSHR 1.00E-01 SURROGATE FOR FAILURE OF ACTIVE COMPONENTS FOR HPR B HPR TRAIN B 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 6.6E-11

[3E-9 + 1E-10 + 7E-11] / 1.32E-2 = 2.4E-7 = NONCONFORMING CDF 3.17E-9 = CONFORMING CDF 2.4E 3.17E-9 = 2.37E-7 DELTA CDF

TOTAL DELTA CDF FOR INTERNAL EVENTS 2.24E-06 DOMINANT ACCIDENT SEQUENCES 2.24E-07 LARGE BREAK/MEDIUM BREAK LOCA 2.24E-07 S2 LOCA 2.37E-07 S1 LOCA 2.93E-06 TOTAL DELTA CDF FOR INTERNAL EVENTS EXTERNAL EVENTS DELTA CDF DERIVATION FROM THE 21 INTERNAL EVENTS DOMINANT CUTSETS, FIRE INITIATING EVENTS WILL BE DEVELOPED TO ASCERTAIN THE RISK INCREASE DUE TO THE PERFORMANCE DEFICIENCY FOR EXTERNAL EVENTS CUTSET #1 IS A NON-RECOVERABLE MFW LOSS SEVERITY IGNITION NON-RECOVERABLE MFW LOSS INITIATING EVENT DEVELOPMENT FACTOR FREQ FROM PAGE 12 OF IPEEE RESPONSE TO RIA DATED 2/16/98 0.0008 0.2 4.00E-03 0.003135 0.57 5.50E-03 0.00169 0.13 1.30E-02 0.00086 0.2 4.30E-03 0.0001 0.1 1.00E-03 0.0004 0.25 1.60E-03 0.000143 0.13 1.10E-03 0.0032 1

3.20E-03 0.00099 0.3 3.30E-03 0.00039 0.3 1.30E-03 0.011708 SURROGATE FOR MFW LOSS DUE TO FIRE INITIATING EVENT FREQ 1.10E-02 TOTAL LOSS OF MAIN FEEDWATER DUE TO FIRE [INIT EVENT]

MLMF 1

3.40E-04 CCF 3 OF 3 AFW PUMP FTS FCCFPUMPS 1.00E-01 MOV 1RH-63 RHR B TO CSIP SUCTION FTO HMV1RH63TN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 4.9E-10

5E-10 / 1.32E-2 = 3.8E-8 NONCONFORMING CASE 5E-10 CONFORMING CASE 3.8E 5E-10 = 3.75E-8 DELTA CDF THE NEXT CUTSETS [2, 3, 4, 5, 11] INVOLVE A LOSS OF 6.9 KV BUS. THERE ARE TWO FIRE SCENERIOS THAT WILL BE CONSIDERED. 1ST A FIRE ORIGINATING IN THE 6.9 KV BUS.

2ND A FIRE ORIGINATING IN THE COMPARTMENT THAT EVENTUALLY ENCOMPASSES THE BUS IN QUESTION. RECOVERY OF THE BUS IS NOT CONSIDERED.

FROM THE IPEEE IGNITION SOURCE DATA SHEET ELECTRICAL CABINET FIRE SCENERIO #1 FREQUENCY IS 7.3E-3 /YR. FOR THE 1-A-SWGRB ROOM. THERE ARE 4 6.9 KV BUSES IN THE COMPARTMENT. THEREFORE, 7.3E-3 /4 = 1.8E-3 FOR BUS 1B-SB IGNITION FREQUENCY SUBSTITUTE THIS 1.8E-3 FOR THE INITIATING EVENT 1.80E-03 6.9 KV BUS 1B-SB FAILS FROM FIRE ORIGINATING IN 1B-SB [INIT EVENT]

JBS1B_SBFN 2

2.20E-03 AFW MD PUMP A FTS FPM1A-SAFS 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 5.2E-09 1.80E-03 6.9 KV BUS 1B-SB FAILS FROM FIRE ORIGINATING IN 1B-SB [INIT EVENT]

JBS1B_SBFN 3

1.55E-03 CHECK VALVE 1AF-16 MD PUMP A DISCHARGE FTO FCVAF-16TN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 3.7E-09 1.80E-03 6.9 KV BUS 1B-SB FAILS FROM FIRE ORIGINATING IN 1B-SB [INIT EVENT]

JBS1B_SBFN 4

1.40E-03 HYDRAULIC VALVE 1AF-19 MD PUMP A DISCH PCV TRANSFER CLOSED FHVAF-19FN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 3.3E-09 1.80E-03 6.9 KV BUS 1B-SB FAILS FROM FIRE ORIGINATING IN 1B-SB [INIT EVENT]

JBS1B_SBFN 5

1.47E-03 PRES TRANS PT-2150A MD PUMP A DISC FAILS LOW PT2150AFN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL

3.5E-09 1.80E-03 6.9 KV BUS 1B-SB FAILS FROM FIRE ORIGINATING IN 1B-SB [INIT EVENT]

JBS1B_SBFN 11 5.50E-03 AFW MD PUMP A OOS FTMMDPA 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 5.00E-01 CONDITIONAL PROBABILITY SAFETY TRAIN B PROTECTED X-PROTB 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 6.5E-09 2.2E-08 CONFORMING CDF NONCONFORMING CDF = 2.2E-8 / 1.32E-2 = 1.67E-6 DELTA CDF = 1.67E 2.2E-8 = 1.64E-6 FIRES THAT CAUSE LOSS OF 6.9 KV THAT DO NOT ORIGINATE IN 1B-SB SCENERIO #2 DOMINANT IGNITION FREQUENCIES FROM IPEEE

[7.3E 1.8E-3] *.214 [SEVERITY FACTOR] *.5 [MANUAL SUPPRESSION] = 5.885E-4 OTHER BUSES 3.29E-3 *.24 [SEVERITY FACTOR] *.5 [MANUAL SUPPRESSION] = 3.95E-4 TRANSFORME 5.885E-4 + 3.95E-4 = 9.8E-4 = IGNITION FREQ CAUSING LOSS OF 6.9 KV FROM OTHER THAN 1B-SB BUS 9.8E-4

  • 2E-8/1.8E-3 = 1.1E-8 = CONFORMING CDF 1.1E-8 / 1.32E-2 = 8.3E-7 NONCONFORMING CDF 8.3E 1.1E-8 = 8.2E-7 DELTA CDF THE SEVERITY FACTORS AND MANUAL SUPPRESSION TERMS WERE DEVELOPED IN A PREVIOUS ANALYSIS ASSOCIATED WITH THERMO-LAG BARRIER PERFORMANCE DEFICIENCY THE NEXT CUTSETS [6, 7, 8, 9, 10] INVOLVE A LOSS OF INSTRUMENT AIR 1.85E-3/YR WILL BE USED AS THE SURROGATE FOR A FIRE CAUSING THE LOSS OF IA &

THE LOSS OF TWO COMPRESSORS. THIS IS CONSERVATIVE AND IS BASED UPON IPEEE RIA RESPONSE DATED 2/16/98. PAGE 12 ASSIGNS A 1.85E-3 IGNITION FREQUENCY TO ONE COMPRESSORS. FOR PURPOSES OF THIS ANALYSIS A CONSERVATIVE ASSUMPTION THAT THIS REPRESENTS A TOTAL LOSS OF IA WILL BE USED AS THE SURROGATE.

1.85E-03 CCF 3 OF 3 AIR COMPRESSORS FAIL TO RUN DUE TO FIRE ACCFC%FTR 6

3.40E-04 CCF 3 OF 3 AFW PUMP FTS FCCFPUMPS 1.00E-01 MOV 1RH-63 RHR B TO CSIP SUCTION FTO HMV1RH63TN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 8.3E-11 1.85E-03 IA COMPRESSOR 1A-NNS FAILS TO RUN DUE TO FIRE ACP1ANS%FN 7

IA COMPRESSOR 1B-NNS FAILS TO RUN DUE TO FIRE ACP1BN%SFN 5.40E-02 IA COMPRESSOR 1C FAILS TO START ACPRACOMNN 3.40E-04 CCF 3 OF 3 AFW PUMP FTS FCCFPUMPS 1.00E-01 MOV 1RH-63 RHR B TO CSIP SUCTION FTO HMV1RH63TN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 4.5E-12 1.85E-03 CCF 2 OF 3 AIR COMPRESSORS 1A & 1C FAIL TO RUN DUE TO FIRE ACCFAC%FR 8

6.18E-01 IA COMPRESSOR 1B-NNS FAILS TO RUN ACP1BN%SFN 3.40E-04 CCF 3 OF 3 AFW PUMP FTS FCCFPUMPS 1.00E-01 MOV 1RH-63 RHR B TO CSIP SUCTION FTO HMV1RH63TN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 5.1E-11 1.85E-03 CCF 2 OF 3 AIR COMPRESSORS 1B & 1C FAIL TO RUN DUE TO FIRE ACCFBC%FR 9

6.18E-01 IA COMPRESSOR 1B-NNS FAILS TO RUN ACP1BN%SFN 3.40E-04 CCF 3 OF 3 AFW PUMP FTS FCCFPUMPS 1.00E-01 MOV 1RH-63 RHR B TO CSIP SUCTION FTO HMV1RH63TN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 5.1E-11 1.85E-03 CCF 2 OF 3 AIR COMPRESSORS 1B & 1A FAIL TO RUN DUE TO FIRE ACCFAB%FR 10 6.18E-01 IA COMPRESSOR 1C-NNS FAILS TO RUN ACP1CN%SFN 3.40E-04 CCF 3 OF 3 AFW PUMP FTS FCCFPUMPS 1.00E-01 MOV 1RH-63 RHR B TO CSIP SUCTION FTO HMV1RH63TN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL

5.1E-11 2.4E-10 CONFORMING CASE CDF NON-CONFORMING CDF = 2.4E-10 / 1.32E-2 = 1.8E-8 DELTA CDF = 1.8E 2.4E-10 = 1.79E-8 THE NEXT CUTSETS [12, 13, 15, 17, 18, 19] INVOLVE A FAILURE OF THE BATTERY. THE IGNITION FREQUENCY OF A BATTERY FIRE IS ESTABLISHED AS 3.2E-3 / THE NUMBER OF BATTERIES - IN THIS CASE 2 [ THIS IS FROM THE IPEEE AND FIVE]. THEREFORE, THE FIRE IGNITION FREQUENCY IS ESTABLISHED AS 3.2E-3 / 2 = 1.6E-3. TWO SCENERIOS WILL BE CONSIDERED. FIRST A SMALL FIRE THAT CAUSES ONLY A FAILURE OF THE BATTERY. SECOND A BATTERY FIRE THAT EVENTUALLY CAUSES A LOSS OF THE COMPARTMENT.

SCENERIO#1 - THE SMALL BATTERY FIRE 1.60E-03 LOSS OF DC BUS DP-1B-SB BY BATTERY FIRE [INIT EVENT]

DBA1B_SBTN 12 5.50E-03 AFW MD PUMP A OOS FTMMDPA 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 5.00E-01 CONDITIONAL PROBABILITY SAFETY TRAIN B PROTECTED X-PROTB 5.00E-02 MANUALLY CLOSE MD PUMP B BKR CLOSE BKR 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 2.9E-10 1.60E-03 LOSS OF DC BUS DP-1B-SB BY BATTERY FIRE [INIT EVENT]

DBA1B_SBTN 13 2.20E-03 AFW MD PUMP A FTS FPM1A-SAFS 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 5.00E-02 MANUALLY CLOSE MD PUMP B BKR CLOSE BKR 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 2.3E-10 1.60E-03 LOSS OF DC BUS DP-1B-SB BY BATTERY FIRE [INIT EVENT]

DBA1B_SBTN 15 2.20E-03 AFW MD PUMP A FTS FPM1A-SAFS 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 5.00E-02 MANUALLY CLOSE MD PUMP B BKR CLOSE BKR 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 2.3E-10 1.60E-03 LOSS OF DC BUS DP-1B-SB BY BATTERY FIRE [INIT EVENT]

DBA1B_SBTN 17

1.55E-03 CHECK VALVE 1AF-16 MD PUMP A DISCHARGE FTO FCVAF-16TN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 5.00E-02 MANUALLY CLOSE MD PUMP B BKR CLOSE BKR 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 1.6E-10 1.60E-03 LOSS OF DC BUS DP-1B-SB BY BATTERY FIRE [INIT EVENT]

DBA1B_SBTN 18 1.47E-03 PRES TRANS PT-2150A MD PUMP A DISC FAILS LOW PT2150AFN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 5.00E-02 MANUALLY CLOSE MD PUMP B BKR CLOSE BKR 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 1.6E-10 1.60E-03 LOSS OF DC BUS DP-1B-SB BY BATTERY FIRE [INIT EVENT]

DBA1B_SBTN 19 1.40E-03 HYDRAULIC VALVE 1AF-19 MD PUMP A DISCH PCV TRANSFER CLOSED FHVAF-19FN 1.32E-02 MOV 1SI-310 SUMP TO RHR PUMP A FTO LMVSI310TS 5.00E-02 MANUALLY CLOSE MD PUMP B BKR CLOSE BKR 1.00E-01 PROVIDE ALTERNATE RCS INJECT FROM RWST VIA REFILL OF RWST RWST REFILL 1.5E-10 1.2E-09 CONFORMING CDF NON-CONFORMING CDF = 1.2E-9 / 1.32E-2 = 9E-8 DELTA CDF = 9E 1.2E-9 = 8.9E-8 SCENERIO #2 - THE LARGE FIRE IN THE LARGE FIRE THE RECOVERY ACTION TO CLOSE THE MD PUMP B BKR IS LOST.

HOWEVER, FOR THE FIRE TO REACH THIS PORPORTION THE FIRE MUST CAPABLE OF DEVELOPING INTO A LARGE FIRE AND MANUAL SUPPRESSION FAILS. FOR PURPOSES OF THIS ANALYSIS A 5E-2 SURROGATE WILL REPRESENT THE POSSIBLE DEVELOPMENT OF THE FIRE AND THE FAILURE OF MANUAL SUPPRESSION EFFORTS.

THEREFORE, THE CONFORMING, NON-CONFORMING & DELTA CDF IS THE SAME AS FOR THE SMALL BATTERY FIRE.

1.9E-09 CONFORMING CDF NON-CONFORMING CDF = 1.2E-9 / 1.32E-2 = 9E-8 DELTA CDF = 9E 1.2E-9 = 8.9E-8

THE FINAL CUTSETS [14, 16, 20, 21] DEAL WITH THE FAILURE OF THE DC DISTRIBUTION PANEL. HOWEVER, THESE CUTSETS ARE SUB-SUMED IN THE 6.9 KV BUS FIRES SINCE THESE FIRES INVOLVED ALL CABINET FIRES AS A CONSERVATISM OF THE ANALYSIS.

TOTAL DELTA CDF DERIVATION [EXTERNAL & INTERNAL EVENTS]

2.24E-06 DOMINANT INTERNAL EVENTS ACCIDENT SEQUENCES 2.24E-07 LARGE BREAK/MEDIUM BREAK LOCA 2.24E-07 S2 LOCA 2.37E-07 S1 LOCA 2.93E-06 TOTAL DELTA CDF FOR INTERNAL EVENTS 8.90E-08 FIRE BATTERY SMALL 8.90E-08 FIRE BATTERY LARGE 1.79E-08 FIRE LOSS OF IA 3.75E-08 FIRE TOTAL LOSS OF MFW 1.64E-06 FIRE 6.9 KV SMALL 8.20E-07 FIRE 6.9 KV COMPARTMENT 2.69E-06 TOTAL DELTA CDF FOR EXTERNAL EVENTS 5.62E-06 TOTAL DELTA CDF

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