ML19162A408
| ML19162A408 | |
| Person / Time | |
|---|---|
| Issue date: | 06/13/2019 |
| From: | Office of Nuclear Regulatory Research |
| To: | |
| T. Rivera | |
| Shared Package | |
| ML19162A398 | List: |
| References | |
| Download: ML19162A408 (29) | |
Text
Step 2: Review of the Internal Events PRA Against the Fire Safe Shutdown Analysis TABLE 1: SYSTEMS IN PRA MODEL System Description Additional Details Address in Comments Fire PRA Model?
(Y or N)
RCS Reactor Coolant PORV for pressure relief and feed & bleed.
System Stuck-open PORV causes small LOCA.
CVCS Chemical and Normal charging and letdown functions are Volume Control not modeled. However, components required System to isolate the volume control tank and letdown are modeled for HPI mode.
HPI High Pressure The charging pumps in the CVCS also Injection System function as safety injection pumps.
RHR Residual Heat Shutdown cooling is not modeled. However, Removal System the RHR pump and heat exchanger are required for recirculation.
AFW Auxiliary Feedwater All three trains are modeled.
System
TABLE 1: SYSTEMS IN PRA MODEL System Description Additional Details Address in Comments Fire PRA Model?
(Y or N)
MFW Main Feed Water Would take considerable effort to get cables involved and their locations MS Main Steam System Stuck-open secondary atmospheric dump valve could cause equivalent of main steam line break.
CS Containment Spray Required for recirculation during LOCA CF Containment Fan Required for recirculation during LOCA Coolers CI Containment Isolation Modeled in LERF ESFAS Emergency Safeguards Actuation System CCW Component Cooling Water System
TABLE 1: SYSTEMS IN PRA MODEL System Description Additional Details Address in Comments Fire PRA Model?
(Y or N)
SW Service Water System AC AC Power (all voltage To extent power is needed to support levels) equipment in the PRA.
DG Emergency Diesel Generators DC DC Power To extent power is needed to support equipment in the PRA.
IA Instrument Air Required for PORV and other valves.
HVAC-HPI HVAC in HPI Pump HVAC is required during 24-hr PRA mission Room HVAC-RHR HVAC in RHR Pump HVAC is required during 24-hr PRA mission Room
TABLE 2: SYSTEMS IN APPENDIX R System Description Additional Details System Comments function addressed in the Internal Events PRA Model?
(Y or N)
RCS Reactor Coolant System PORV to prevent spurious opening and PORV block valve fails to close results in consequential small LOCA.
CVCS Chemical Volume and Normal charging and letdown Control System functions are credited.
RHR Residual heat Removal Shutdown cooling is credited System AFW Auxiliary Feedwater Motor-driven and steam -driven System AFW pumps are credited.
MS Main Steam System Steam relief for secondary heat removal. Secondary relief valves and MSIVs are also
TABLE 2: SYSTEMS IN APPENDIX R System Description Additional Details System Comments function addressed in the Internal Events PRA Model?
(Y or N) included to prevent spurious opening causing uncontrolled secondary depressurization.
CCW Component Cooling Water System SW Service Water System AC AC Power (all voltage But certain buses not credited levels) (especially non-safety) if loads not otherwise required for safe shutdown DG Emergency Diesel Generators DC DC Power But certain buses not credited (especially non-safety) if loads
TABLE 2: SYSTEMS IN APPENDIX R System Description Additional Details System Comments function addressed in the Internal Events PRA Model?
(Y or N) not otherwise required for safe shutdown IA Instrument Air Required for normal charging Y and letdown valves.
RCS Instruments RCS pressure, Required for safe shutdown temperature, nuclear monitoring.
instrumentation, etc Secondary Steam Generator level, Required for safe shutdown Instruments Streamline pressure, etc. monitoring.
HVAC-HPI HVAC in HPI Pump HVAC is required during 72-hr Room Appendix R mission HVAC-RHR HVAC in RHR Pump HVAC is required during 72-hr Room Appendix R mission
TABLE 2: SYSTEMS IN APPENDIX R System Description Additional Details System Comments function addressed in the Internal Events PRA Model?
(Y or N)
HVAC-AFW HVAC in AFW Pump HVAC is required during 72-hr Room Appendix R mission
TABLE 3: LIST OF BASIC EVENTS IN PRA MODEL Basic Event Description
%I1 Interfacing Systems LOCA at RCS/LPI Interface (1 MOV and 1 check valve in series)
%I2 Interfacing Systems LOCA at RCS/RHR Interface (2 MOVs in series)
%I3 Interfacing Systems LOCA at RCS/CCW interface (Reactor Coolant Pump Cooler rupture)
%T1 REACTOR TRIP
%T15 LOSS OF COMPONENT COOLING WATER (CCW)
%T23 PARTIAL LOAD REJECTION
%T25 REACTOR TRIP WITH PORV OPENING
%T4 LOSS OF MAIN FEEDWATER
%T5C GRIDCENTERD LOSS OF OFFSITE POWE INITIATING EVENT
%T5D WEATHERCENTERD LOSS OF OFFSITE POWE INITIATING EVENT
%T5P PLANTCENTERD LOSS OF OFFSITE POWE INITIATING EVENT
%T6 STEAMLINE/FEED LINE BREAK UPSTREAM OF MAIN STEAM ISOLATION VALVE AFWAFTR Motordriven AFW Pump A fails to run AFWAFTS Motordriven AFW Pump A fails to start AFWBFTR Steamdrivens AFWB fails to run AFWBFTS Steamdrivens AFWB fails to start AFWCFTR Dieseldrivern AFW Pump C fails to run AFWCFTS Dieseldrivern AFW Pump C fails to start AOV1_FTC PORV AOV1 fails to CLOSE AOV1_FTO PORV AOV1 fails to open AOV3_FTC AOV3 FAILS TO CLOSE CCW_FAILS FAILURE OF COMPONENT COOLING WATER AFTER TRIP COMP1_FTR AIR COMPRESSOR 1 FAILS TO RUN
TABLE 3: LIST OF BASIC EVENTS IN PRA MODEL Basic Event Description EPS120VBUSAF 120V BUS A FAULT EPS120VBUSAINVF FAILURE OF 120V BUS A INVERTER EPS120VBUSBF 120V BUS B FAULT EPS120VBUSBINVF FAILURE OF 120V BUS B INVERTER EPS125VDCBUSAF FAULT ON 125V DC BUS A EPS125VDCBUSBF FAULT ON 125V DC BUS B EPS125VDCPNLAF FAULT ON 125V DC PANEL A EPS125VDCPNLBF FAULT ON 125V DC PANEL B EPS480VLC1F 480V LOAD CENTER 1 FAULT EPS480VLC1XTF 480V LOAD CENTER 1 TRANSFORMER FAILS EPS480VLCAF 480V LOAD CENTER A FAULT EPS480VLCAXTF 480V LOAD CENTER A TRANSFORMER FAILS EPS480VLCBF 480V LOAD CENTER B FAULT EPS480VLCBXTF 480V LOAD CENTER B TRANSFORMER FAILS EPS480VMCCA1F 480V MCC A1 FAULT EPS480VMCCB1F 480V MCC B1 FAULT EPS4VBUS1F 4KV BUS 1 FAULT EPS4VBUSAF 4KV BUS A FAULT EPS4VBUSBF 4KV BUS B FAULT EPSBATA FAILURE OF BATTERY A EPSBATB FAILURE OF BATTERY B EPSBCAF FAILURE OF BATTERY CHARGER A EPSBCBF FAILURE OF BATTERY CHARGER B EPSDGAF FAILURE OF DIESEL GENERATOR A
TABLE 3: LIST OF BASIC EVENTS IN PRA MODEL Basic Event Description EPSDGBF FAILURE OF DIESEL GENERATOR B HPIA_FTR HPIA fails to run HPIA_FTS HPIA fails to start HPIA_HVAC LOSS OF HVAC COOLING TO HPI PUMP A ROOM HPIB_FTR HPIB fails to run HPIB_FTS HPIB fails to start HPIB_HVAC LOSS OF HVAC COOLING TO HPI PUMP B ROOM MFWFAIL MAIN FEEDWATER SYSTEM FAILURE AFTER REACTOR TRIP MOV10_FTO MOV10 fails to open MOV11_FTO MOV11 fails to open MOV14_FTO MOV14 FAILS TO OPEN MOV15_FTO MOV15 FAILS TO OPEN MOV18_FTO MOV18 fails to open MOV1_FTO MOV1 FAILS TO OPEN MOV2_FTC MOV2 fails to close MOV3_FTO MOV3 fails to open MOV4_FTO MOV4 fails to open MOV5_FTC MOV5 fails to close MOV5_FTO MOV5 fails to open MOV6_FTC MOV6 fails to close MOV6_FTO MOV6 fails to open MOV9_FTO MOV9 FAILS TO OPEN OPER1 Operator fails to switch over to recirculation OPER4 Operator fails to establish feed an bleed cooling
TABLE 3: LIST OF BASIC EVENTS IN PRA MODEL Basic Event Description OPER7 OPERATOR FAILS TO TRIP REACTOR COOLANT PUMP PT1_FL PRESSURE TRANSMITTER PT1 FAILS LOW RCPSEAL RCP SEAL LOCA GIVEN LOSS OF CCW AND SUCCESSFUL RCP TRIP RHRBFTR RHR PUMP B FAILS TO RUN RHRBFTS RHR PUMP B FAILS TO START RHRBHVAC LOSS OF RHR PUMP B ROOM HVAC COOLING SUTF FAILURE OF STARTUP TRANSFORMER (SUT)
UATF FAILURE OF UNIT AUXILIARY TRANSFORMER (UAT)
Continuation of Step2 and Including Steps 4 thru 6:
TABLE 4: DISPOSTION OF COMPONENTS IN PRA AND APPENDIX R (USE TABLES 1-3 AND FIGURES 1-3)
In PRA In Appendix Add to Fire PRA Comments Power Equipment ID Equipment Description Model? (Y or R? (Y or N) Equipment List? (Y or N)
Supply N)
High pressure safety Y HPI-A 4.16kV Bus A injection pump A High pressure safety Y HPI-B 4.16kV Bus B injection pump B RHR-B RHR pump 4.16kV Bus B Y Instrument air Y COMP-1 480 V LC 1 compressor Motor-driven AFW pump Y AFW-A 4.16kV Bus A A
Steam-driven AFW Pump Y AFW-B N/A B
N Diesel-driven AFW Pump AFW-C NA C
TABLE 4: DISPOSTION OF COMPONENTS IN PRA AND APPENDIX R (USE TABLES 1-3 AND FIGURES 1-3)
In PRA In Appendix Add to Fire PRA Comments Power Equipment ID Equipment Description Model? (Y or R? (Y or N) Equipment List? (Y or N)
Supply N)
Y (only to AOV-1 Pressure operated relief 120VAC Bus ensure (SOV-1) valve A remains closed)
AOV-2 125 VDC Bus Y (for normal Letdown isolation valve B letdown)
(SOV-2)
AOV-3 Charging pump injection 125 VDC Bus Y (for normal valve B charging)
(SOV-3)
AOV-4 Atmospheric dump valve DC-Bus-1 Y MOV-1 HPI-A discharge valve 480V MCC A1 N Y (for normal MOV-2 VCT isolation valve 480V MCC B1 suction to charging)
MOV-3 Cont. sump recirc valve 480V MCC A1 N MOV-4 Cont. sump recirc valve 480V MCC B1 N MOV-5 RWST isolation valve 480V MCC A1 N
TABLE 4: DISPOSTION OF COMPONENTS IN PRA AND APPENDIX R (USE TABLES 1-3 AND FIGURES 1-3)
In PRA In Appendix Add to Fire PRA Comments Power Equipment ID Equipment Description Model? (Y or R? (Y or N) Equipment List? (Y or N)
Supply N)
MOV-6 RWST isolation valve 480V MCC B1 N Y (for RHR inboard suction MOV-7 480V MCC A1 shutdown valve cooling)
Y (for RHR outboard suction MOV-8 480V MCC B1 shutdown valve cooling)
MOV-9 HPI-B discharge valve 480V MCC B1 N MOV-10 AFW-A discharge valve 480V MCC A1 Y 125 VDC Bus Y MOV-11 AFW-B discharge valve B
MOV-13 PORV block valve 480V MCC A1 Y AFW-B turbine steam line 125 VDC Bus Y MOV-14 isolation valve B AFW-B steam inlet 125 VDC Bus Y MOV-15 throttle valve B
TABLE 4: DISPOSTION OF COMPONENTS IN PRA AND APPENDIX R (USE TABLES 1-3 AND FIGURES 1-3)
In PRA In Appendix Add to Fire PRA Comments Power Equipment ID Equipment Description Model? (Y or R? (Y or N) Equipment List? (Y or N)
Supply N)
AFW-A test line isolation N MOV-16 480V MCC A1 valve AFW-B test line isolation N MOV-17 480V MCC B1 valve 480 V MCC- N MOV-18 AFW-C discharge valve B1 AFW-C test line isolation 480 V MCC- N MOV-19 valve B1 Shutdown cooling 480 V MCC- Y MOV-20 discharge valve B1 120VAC Bus Y LI-1 RWST level A
120VAC Bus Y LI-2 RWST level B
120VAC Bus N LI-3 Containment sump level A
TABLE 4: DISPOSTION OF COMPONENTS IN PRA AND APPENDIX R (USE TABLES 1-3 AND FIGURES 1-3)
In PRA In Appendix Add to Fire PRA Comments Power Equipment ID Equipment Description Model? (Y or R? (Y or N) Equipment List? (Y or N)
Supply N) 120VAC Bus N LI-4 Containment sump level B
120VAC Bus Y LI-5 SG secondary level A
120VAC Bus Y LI-6 SG secondary level B
Letdown heat exchanger 120VAC Bus N TI-1 outlet temperature A 120VAC Bus Y PT-1 RCS pressure B
120VAC Bus N A-1 AFW-B motor high temp A
SUT-1 Y SWGR-A Train A 4160 V Bus EDG-A SWGR-B Train B 4160 V Bus SUT-1 Y
TABLE 4: DISPOSTION OF COMPONENTS IN PRA AND APPENDIX R (USE TABLES 1-3 AND FIGURES 1-3)
In PRA In Appendix Add to Fire PRA Comments Power Equipment ID Equipment Description Model? (Y or R? (Y or N) Equipment List? (Y or N)
Supply N)
EDG-B Y
UAT-1 SWGR-1 Non-Safety 4160 V Bus SUT-1 UAT-1 N SWGR-2 Non-Safety 4160 V Bus SUT-1 SUT-1 Startup Transformer OSP Y Main N UAT-1 Auxiliary Transformer generator Train A Emergency Y EDG-A PNL-A Diesel Generator Train B Emergency Y EDG-B PNL-B Diesel Generator Non-Safety 480 V Load Y LC-1 SST-1 Center
TABLE 4: DISPOSTION OF COMPONENTS IN PRA AND APPENDIX R (USE TABLES 1-3 AND FIGURES 1-3)
In PRA In Appendix Add to Fire PRA Comments Power Equipment ID Equipment Description Model? (Y or R? (Y or N) Equipment List? (Y or N)
Supply N)
Non-Safety 480 V Load N LC-2 SST-2 Center Train A 480 V Load Y LC-A SST-A Center Y
Train B 480 V Load LC-B SST-B Center Non-Safety Station Y SST-1 SWGR-1 Service Transformer Non-Safety Station N SST-2 SWGR-2 Service Transformer Train A Station Service Y SST-A SWGR-A Transformer Train B Station Service Y SST-B SWGR-B Transformer MCC-1 Non-Safety 480 V Motor LC-1 Y
TABLE 4: DISPOSTION OF COMPONENTS IN PRA AND APPENDIX R (USE TABLES 1-3 AND FIGURES 1-3)
In PRA In Appendix Add to Fire PRA Comments Power Equipment ID Equipment Description Model? (Y or R? (Y or N) Equipment List? (Y or N)
Supply N)
Control Center Non-Safety 480 V Motor N MCC-2 LC-2 Control Center Train A 480 V Motor Y MCC-A1 LC-A Control Center Train B 480 V Motor Y MCC-B1 LC-B Control Center Non-Safety Swing Battery MCC-1 Y BC-1 Charger MCC-2 BC-A Train A Battery Charger MCC-A1 Y BC-B Train B Battery Charger MCC-B1 Y BAT-1 Non-Safety Battery N/A Y BAT-A Train A Battery N/A Y BAT-B Train B Battery N/A Y DC BUS-1 Non-Safety 125 VDC Bus BC-1 Y
TABLE 4: DISPOSTION OF COMPONENTS IN PRA AND APPENDIX R (USE TABLES 1-3 AND FIGURES 1-3)
In PRA In Appendix Add to Fire PRA Comments Power Equipment ID Equipment Description Model? (Y or R? (Y or N) Equipment List? (Y or N)
Supply N)
BAT-1 BC-A Y DC BUS-A Train A 125 VDC Bus BAT-A BC-B Y DC BUS-B Train B 125 VDC Bus BAT-B INV-A Train A Inverter DC BUS-A Y INV-B Train B Inverter DC BUS-B Y Train A 120 VAC Vital Y VITAL-A INV-A Bus Train B 120 VAC Vital Y VITAL-B INV-B Bus PNL-A Train A 125 VDC Panel DC BUS-A Y PNL-B Train B 125 VDC Panel DC BUS-B Y
Step 3: Identify Fire-Induced Initiating Events Based on Equipment Affected Will need to examine each fire compartment / analysis unit and determine based on the equipment and cables located there, which of the initiators (from Step 1 of Task 2) can be caused by a fire in that compartment / analysis unit. If any new initiators are identified, include in the Fire PRA. The Fire PRA will then include fires mapped to initiating events in the model. Each compartment / analysis unit should have a disposition with regard to the initiating event(s) that occur as a result of a fire in each location (even if none).
INITIATING EVENTS IN INTERNAL EVENTS PRA Initiating Event Description
%I1 Interfacing Systems LOCA at RCS/LPI Interface (1 MOV and 1 check valve in series)
%I2 Interfacing Systems LOCA at RCS/RHR Interface (2 MOVs in series)
%I3 Interfacing Systems LOCA at RCS/CCW interface (Reactor Coolant Pump Cooler rupture)
%T1 REACTOR TRIP
%T15 LOSS OF COMPONENT COOLING WATER (CCW)
%T23 PARTIAL LOAD REJECTION
%T25 REACTOR TRIP WITH PORV OPENING
%T4 LOSS OF MAIN FEEDWATER
%T5C GRIDCENTERD LOSS OF OFFSITE POWE INITIATING EVENT
%T5D WEATHERCENTERD LOSS OF OFFSITE POWE INITIATING EVENT
%T5P PLANTCENTERD LOSS OF OFFSITE POWE INITIATING EVENT
%T6 STEAMLINE/FEED LINE BREAK UPSTREAM OF MAIN STEAM ISOLATION VALVE
MAPPING OF INITERNAL EVENTS INITIATING EVENTS TO FIRE COMPARTMENT Equipment Equipment Description Internal Events Initiating Compartment Impacted by Fire Event (s) 1 AFW-A Motor-driven AFW pump A AFW-B Steam-driven AFW pump B AFW-C Diesel-driven AFW pump C A-1 AFW motor high temperature AOV-1 Power operated relief valve AOV-2 Letdown isolation valve AOV-3 Charging pump injection valve AOV-4 Atmospheric dump valve LC-1 Non-safety 480 V load center 1 LC-2 Non-safety 480 V load center 2 LC-A Train A 480 V load center LC-B Train B 480 V load center SWGR-1 Non-safety 4160 V switchgear 1 SWGR-2 Non-safety 4160 V switchgear 2 SWGR-A Train A 4160 V switchgear SWGR-B Train B 4160 V switchgear EDG-A Train A emergency diesel generator EDG-B Train B emergency diesel generator HPI-A High pressure safety injection pump A HPI-B High pressure safety injection pump B LI-1 RWST level instrument LI-2 RWST level instrument LI-3 Containment sump level instrument LI-4 Containment sump level instrument LI-5 SG secondary level instrument LI-6 SG secondary level instrument MFW Main feedwater MOV-1 HPI discharge valve
MAPPING OF INITERNAL EVENTS INITIATING EVENTS TO FIRE COMPARTMENT Equipment Equipment Description Internal Events Initiating Compartment Impacted by Fire Event (s)
MOV-10 AFW pump A discharge valve MOV-11 AFW pump B discharge valve MOV-13 PORV block valve MOV-14 AFW pump B steam line isolation valve MOV-15 AFW pump B steam inlet throttle valve MOV-18 AFW pump C discharge valve MOV-2 VCT isolation valve MOV-3 Cont. sump recirc. valve MOV-4 Cont. sump recirc. valve MOV-5 RWST isolation valve MOV-6 RWST isolation valve MOV-9 HPI discharge valve PT-1 RCS pressure instrument RCP-1 Reactor coolant pump 1 SUT-1 Startup transformer TI-1 Letdown heat exchanger outlet temperature 2 A-1 AFW motor high temperature AOV-2 Letdown isolation valve AOV-3 Charging pump injection valve HPI-A High pressure safety injection pump A HPI-B High pressure safety injection pump B MFW Main feedwater MOV-1 HPI discharge valve MOV-2 VCT isolation valve MOV-3 Cont. sump recirc. valve MOV-4 Cont. sump recirc. valve MOV-5 RWST isolation valve MOV-6 RWST isolation valve
MAPPING OF INITERNAL EVENTS INITIATING EVENTS TO FIRE COMPARTMENT Equipment Equipment Description Internal Events Initiating Compartment Impacted by Fire Event (s)
MOV-9 HPI discharge valve RCP-1 Reactor coolant pump 1 TI-1 Letdown heat exchanger outlet temperature 3 AFW-A Motor-driven AFW pump A AFW-B Steam-driven AFW pump B AFW-C Diesel-driven AFW pump C A-1 AFW motor high temperature AOV-1 Power operated relief valve AOV-2 Letdown isolation valve AOV-3 Charging pump injection valve AOV-4 Atmospheric dump valve INV-A Train A inverter INV-B Train B inverter LC-1 Non-safety 480 V load center 1 LC-2 Non-safety 480 V load center 2 LC-A Train A 480 V load center LC-B Train B 480 V load center SWGR-1 Non-safety 4160 V switchgear 1 SWGR-2 Non-safety 4160 V switchgear 2 SWGR-A Train A 4160 V switchgear SWGR-B Train B 4160 V switchgear EDG-A Train A emergency diesel generator EDG-B Train B emergency diesel generator HPI-A High pressure safety injection pump A HPI-B High pressure safety injection pump B LI-1 RWST level instrument LI-2 RWST level instrument LI-3 Containment sump level instrument
MAPPING OF INITERNAL EVENTS INITIATING EVENTS TO FIRE COMPARTMENT Equipment Equipment Description Internal Events Initiating Compartment Impacted by Fire Event (s)
LI-4 Containment sump level instrument LI-5 SG secondary level instrument LI-6 SG secondary level instrument MFW Main feedwater MOV-1 HPI discharge valve MOV-10 AFW pump A discharge valve MOV-11 AFW pump B discharge valve MOV-13 PORV block valve MOV-14 AFW pump B steam line isolation valve MOV-15 AFW pump B steam inlet throttle valve MOV-18 AFW pump C discharge valve MOV-2 VCT isolation valve MOV-3 Cont. sump recirc. valve MOV-4 Cont. sump recirc. valve MOV-5 RWST isolation valve MOV-6 RWST isolation valve MOV-9 HPI discharge valve PT-1 RCS pressure instrument RCP-1 Reactor coolant pump 1 TI-1 Letdown heat exchanger outlet temperature 9 AFW-A Motor-driven AFW pump A AFW-B Steam-driven AFW pump B A-1 AFW motor high temperature AOV-1 Power operated relief valve AOV-2 Letdown isolation valve AOV-3 Charging pump injection valve AOV-4 Atmospheric dump valve VITAL-A Train A 120 VAC vital bus
MAPPING OF INITERNAL EVENTS INITIATING EVENTS TO FIRE COMPARTMENT Equipment Equipment Description Internal Events Initiating Compartment Impacted by Fire Event (s)
INV-A Train A inverter VITAL-B Train B 120 VAC vital bus INV-B Train B inverter MCC-A1 Train A 480 V motor control center MCC-B1 Train B 480 V motor control center SWGR-B Train B 4160 V switchgear BC-A Train A battery charger BC-B Train B battery charger MFW Main feedwater MOV-1 HPI discharge valve MOV-10 AFW pump A discharge valve MOV-11 AFW pump B discharge valve MOV-13 PORV block valve MOV-2 VCT isolation valve MOV-3 Cont. sump recirc. valve MOV-4 Cont. sump recirc. Valve MOV-7 RHR inboard suction valve MOV-8 RHR outboard suction valve MOV-9 HPI discharge valve TI-1 Letdown heat exchanger outlet temperature 10 AFW-A Motor-driven AFW pump A AOV-1 Power operated relief valve VITAL-A Train A 120 VAC vital bus INV-A Train A inverter DC BUS-A Train A 125 VDC bus PNL-A Train A 125 VDC panel LC-A Train A 480 V load center SST-A Train A station service transformer
MAPPING OF INITERNAL EVENTS INITIATING EVENTS TO FIRE COMPARTMENT Equipment Equipment Description Internal Events Initiating Compartment Impacted by Fire Event (s)
MCC-A1 Train A 480 V motor control center SWGR-A Train A 4160 V switchgear BAT-A Train A battery BC-A Train A battery charger EDG-A Train A emergency diesel generator EDG-B Train B emergency diesel generator HPI-A High pressure safety injection pump A MFW Main feedwater MOV-1 HPI discharge valve MOV-3 Cont. sump recirc. valve 11 AFW-B Motor-driven AFW pump B AOV-4 Atmospheric dump valve VITAL-B Train B 120 VAC vital bus INV-B Train B inverter DC BUS-B Train B 125 VDC bus PNL-B Train B 125 VDC panel LC-B Train B 480 V load center SST-B Train B station service transformer MCC-B1 Train B 480 V motor control center SWGR-B Train B 4160 V switchgear BAT-B Train B battery BC-B Train A battery charger HPI-B High pressure safety injection pump B MFW Main feedwater MOV-11 AFW pump B discharge valve MOV-2 VCT isolation valve MOV-4 Cont. sump recirc. valve
MAPPING OF INITERNAL EVENTS INITIATING EVENTS TO FIRE COMPARTMENT Equipment Equipment Description Internal Events Initiating Compartment Impacted by Fire Event (s) 12 AFW-C Diesel-driven AFW pump C AOV-4 Atmospheric dump valve COMP1 Instrument air compressor DC BUS-1 Non-safety 250 VDC bus LC-1 Non-safety 480 V load center 1 SST-1 Non-safety station service transformer 1 LC-2 Non-safety 480 V load center 2 SST-2 Non-safety station service transformer 2 MCC-1 Non-safety 480 V motor control center 1 MCC-2 Non-safety 480 V motor control center 2 SWGR-1 Non-safety 4160 V switchgear 1 SWGR-2 Non-safety 4160 V switchgear 2 SWGR-A Train A 4160 V switchgear SWGR-B Train B 4160 V switchgear EPS-ATS1 Non-safety DC bus transfer switch EPS-BC1 Non-safety DC bus battery charger EDG-A Train A emergency diesel generator EDG-B Train B emergency diesel generator LI-1 RWST level instrument LI-2 RWST level instrument LI-3 Containment sump level instrument LI-4 Containment sump level instrument MFW Main feedwater MOV-10 AFW pump A discharge valve MOV-11 AFW pump B discharge valve MOV-14 AFW pump B steam line isolation valve MOV-15 AFW pump B steam inlet throttle valve MOV-18 AFW pump C discharge valve
MAPPING OF INITERNAL EVENTS INITIATING EVENTS TO FIRE COMPARTMENT Equipment Equipment Description Internal Events Initiating Compartment Impacted by Fire Event (s)
MOV-5 RWST isolation valve MOV-6 RWST isolation valve MOV-7 RHR inboard suction valve MOV-8 RHR outboard suction valve RCP-1 Reactor coolant pump 1 SUT-1 Startup transformer 13 SWGR-1 Non-safety 4160 V switchgear 1 SWGR-2 Non-safety 4160 V switchgear 2 SWGR-A Train A 4160 V switchgear SWGR-B Train B 4160 V switchgear LI-1 RWST level instrument LI-2 RWST level instrument MFW Main feedwater SUT-1 Startup transformer 15 BAT-1 Non-safety battery MFW Main feedwater