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108 Cards in this Set
- Front
- Back
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WHAT IS THE DESIGN BASIS FOR THE 125/250 VDC SYSTEMS? |
TO BE ABLE TO CARRY NORMAL LOADS FOR 8 HOURS, PLUS EMERGENCY / SAFE SHUTDOWN LOADS OF OTHER UNIT FOR 4 HOURS, FOLLOWING LOSS OF ALL AC POWER |
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WHAT IS THE DESIGN BASIS FOR THE 24/48 VDC SYSTEM? |
TO BE ABLE TO CARRY FULL LOAD FOR 8 HOURS WITHOUT RECHARGING |
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WHERE ARE THE ALTERNATE 125 VDC BATTERIES? |
U1: MEZZ LEVEL INSIDE BATTERY ROOM
U2 : MEZZ LEVEL OUTSIDE BATTERY ROOM |
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HOW MANY 250 VDC CHARGERS ARE THERE? |
3
U1, U2, 1/2 (ON UNIT 1) |
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WHAT ARE THE MAJOR 250 VDC LOADS? |
MCC 1A (2A) - HPCI VALVES MCC 1B (2B) - RCIC VALVES
TB MCC 1 (2) - FEEDS 1A AND 2A PLUS OTHER EMERGENCY LOADS |
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WHAT LOAD IS ON THE NON-ESSENTIAL 250 VDC SYSTEM? |
TURBINE EMERGENCY BEARING OIL PUMP |
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WHAT IS THE NORMAL SUPPLY FOR POWER TO 250 VDC MCC 1B? |
TB 250 VDC MCC 2 |
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WHAT IS REQUIRED TO POWER 250 VDC MCC 2B FROM UNIT 2? |
TRANSFER REMOVABLE LINKS FROM MCC 2B TO MCC 2A |
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WHAT ARE THE POWER SUPPLIES FOR THE 250 VDC CHARGERS? |
U1 MCC 19-2 U2 MCC 29-2 1/2 18-2 / 28-2 |
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WHAT IS THE POWER SUPPLY FOR THE NON-ESSENTIAL 250 VDC CHARGERS? |
1A: 15-2 1B: 16/26-1
2A: 26-3 2B: 25-6 |
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WHAT IS THE PURPOSE OF THE ALTERNATE 125 VDC BATTERY? |
TO ALLOW THE 125 VDC BATTERY TO UNDERGO TESTING WITHOUT ENTERING A DUAL UNIT OUTAGE |
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WHAT IS DIRECTLY POWERED BY BATTERY BUS 1 (125 VDC)? |
BUS 1A |
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WHAT IS FED BY 125 VDC BUS 1A? |
RB 1 BUS 1A-1 BUS 1A-2 BUS 2B
U1 DIV 1 U2 DIV 2 |
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WHAT IS FED BY 125 VDC BUS 2B? |
2B-1 WHEN THEN FEEDS 2B-2 |
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WHAT IS FED BY 125 VDC BUS 1B? |
1B-1 WHICH THEN FEEDS 1B-2 |
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WHAT IS THE NAMING CONVENTION FOR 125 VDC BUSES? |
FIRST NUMBER - UNIT
LETTER - DIVISION (A= DIV 1 B= DIV 2)
FINAL NUMBER - ESS OR NON-ESS (1=ESS 2=NON) |
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WHAT IS THE NORMAL CONTROL POWER SOURCE FOR BUS 13-1 AND BUS 18? |
RB-1 |
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WHAT IS THE RESERVE SOURCE FOR CONTROL POWER TO BUSES 14-1 AND 19? |
RB-1 |
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WHAT IS THE NORMAL CONTROL POWER SOURCE FOR BUS 14-1 AND BUS 19? |
1B-1 |
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WHAT IS THE RESERVE CONTROL POWER SOURCE FOR BUS 13-1 AND BUS 18? |
1B-1 |
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WHAT ARE THE NORMAL AND RESERVE POWER SUPPLIES FOR RB-1? |
NORMAL : BUS 1A
RESERVE: 1B-1 |
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WHICH 4KV/480 BUSES ARE DIV 1 AND DIV 2 NORMALLY CONTROLLING? |
DIV 1: 11, 13, 15, PLUS 13-1, 18
DIV 2: 12, 14, 16, 17, PLUS 14-1, 19 |
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TO SWAP RB-1 FROM BUS 1A TO BUS 1B-1 CONTROL, WHAT IS REQUIRED? |
REMOVE AND REINSTALL COPPER LINKS |
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WHAT PICKS UP THE CONTROL POWER FOR BUSES 13-1 OR 14-1 IF NORMAL CONTROL POWER IS LOST? |
SBO 125VDC FROM BUS 6A-1 (7A-1 FOR UNIT 2)
USES AN AUTOMATIC TRANSFER SWITCH
WILL NOT AUTO SWAP BACK
NOT SAFETY RELATED, SO MAKES ESS BUS INOP |
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WHAT SUPPLIES POWER TO THE 125 VDC CHARGERS? |
CHARGER 1: 19-2 CHARGER 1A: 18-2
CHARGER 2: 29-2 CHARGER 2A: 28-2 |
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WHAT SUPPLIES POWER TO THE ALTERNATE 125 VDC CHARGERS? |
16-3 (26-3) |
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WHAT SUPPLIES POWER TO THE 24/48 VDC BATTERY CHARGERS? |
INSTRUMENT BUS |
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WHAT LOADS ARE SUPPORTED BY THE 24/48 BATTERIES? |
SRMs IRMs SDV LEVEL INSTRUMENTS RAD MONITORS OFFGAS 15 MINUTE TIMER |
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WHAT POWERS THE VENTILATION AND HEATING FOR THE BATTERY ROOMS? |
MCC 15-2 (25-1) |
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WHY IS BATTERY ROOM VENTILATION REQUIRED? |
REMOVE HYDROGEN GENERATED DURING BATTERY USE |
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WHAT IS THE NORMAL POWER SUPPLY TO COMPUTER UPS? |
BUS 17 |
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WHAT MAJOR LOADS ARE SUPPORTED BY 125VDC? |
BUS CONTROL POWER ECCS LOGIC ATWS TURBINE/GENERATOR PROTECTIVE RELAYS CONTAINMENT INTERLOCK DOORS BACKUP SCRAM VALVES EDG FIELD FLASH AND CONTROL POWER EDG AIR START |
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HOW IS THE 1/2 250 VDC CHARGER KEPT FROM BEING DUAL FED BY THE UNITS? |
KEYLOCK INTERLOCK AT 28-2 |
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WHAT WILL TRIP A BATTERY CHARGER? |
INTERNAL OVERVOLTAGE (FLOAT VOLTAGE TOO HIGH) |
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WHAT IS A FUSIBLE SWITCH AND WHERE ARE THEY? |
A DISCONNECT DEVICE WITH A FUSE LOCATED DOWNSTREAM OF THE SWITCH
THEY ARE USED ON THE 125 VDC FEEDS TO VARIOUS 125 VDC BUSES |
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WHAT ACTIONS ARE REQUIRED FOR A LEVEL 3 GROUND? |
TAKE ACTION TO ISOLATE AND REPAIR ENTER 14 DAY CLOCK PERFORM OP EVAL |
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WHAT AUTOMATIC ACTIONS OCCUR ON A LOSS OF THE 1A (2A) 24/48 BUS? |
1/2 SCRAM (A)
OFFGAS TIMER STARTS |
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WHAT ARE THE REQUIREMENTS FOR THE BATTERY SYSTEMS FOR REACTOR STARTUP? |
BOTH 125 AND 250 VDC SYSTEMS MUST BE OPERABLE FOR STARTUP OF EITHER UNIT |
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IF A BATTERY CHARGER TRIPS WHAT ACTIONS FOLLOW? |
BATTERY PICKS UP LOAD
ENTER TECH SPEC 3.8.4 UNTIL BACKUP CHARGER IS ONLINE |
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HOW MANY 24/48 VDC BATTERY CHARGERS ARE THERE? |
4
2 PER SUBSYSTEM (A/B) |
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WHAT IS THE PURPOSE OF ESSENTIAL SERVICE AND INSTRUMENT BUS? |
PROVIDE RELIABLE 120V SINGLE PHASE POWER FOR INSTRUMENTATION AND CONTROL |
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WHAT IS THE NORMAL POWER SUPPLY TO ESSENTIAL SERVICE? |
BUS 18 FEEDING ESS UPS |
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WHAT ARE THE THREE POWER SUPPLIES TO THE ESS UPS, IN ORDER OF PREFERENCE? |
BUS 18 (28) 250 VDC MCC 1 (2) BUS 17 (26) |
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WHAT IS THE RESERVE POWER SUPPLY TO ESSENTIAL SERVICE? |
MCC 18-2 (28-2) |
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WHAT ARE THE TECH SPEC REQUIREMENTS FOR ESSENTIAL SERVICE? |
BUS MUST BE POWERED
FEED FROM 18-2 (28-2) MUST BE AVAILABLE
MUST BE AVAILABLE TO SUPPORT CREVS/SBGT FOR OTHER UNIT |
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WHICH TWO POWER SOURCES FEED THE ESS ABT? |
ESS UPS (FROM STATIC SWITCH)
RESERVE POWER 18-2 (28-2) |
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WHAT IS THE NORMAL SUPPLY THROUGH THE STATIC SWITCH TO THE ABT? |
STATIC SWITCH IS NORMAL SEEKING
POWER FROM INVERTER (BUS 18 OR MCC 1) IS PREFERRED OVER POWER FROM THE REGULATOR (BUS 17) |
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WHICH ESSENTIAL SERVICE SWITCHES WILL INTERRUPT POWER AND WHICH WILL NOT? |
ABT - BREAK BEFORE MAKE TO SWAP FROM UPS TO RESERVE POWER FROM 18-2
MCC 1 / BUS 18 FEED INTO AUCTIONEERING DIODE, THEN INVERTER. STATIC SWITCH IS MAKE BEFORE BREAK TO CHOOSE BETWEEN INVERTER AND REGULATOR FROM BUS 17 |
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WHEN WILL THE ABT SWAP TO RESERVE POWER FROM MCC 18-2? |
<70% RATED VOLTAGE, IF OTHER FEED IS >90% VOLTAGE AND >54 HZ |
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WHAT ARE THE NORMAL AND ALTERNATE FEEDS FOR THE INSTRUMENT BUS? |
NORMAL: MCC 18-2 (28-2)
RESERVE: MCC 15-2 (29-2) |
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WILL A SWAP OF THE INSTRUMENT BUS ABT INTERRUPT POWER? |
YES. ABT IS BREAK BEFORE MAKE |
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WHICH ABT IS POWER SEEKING AND WHICH IS NORMAL SEEKING? |
ESSENTIAL SERVICE: POWER SEEKING
INST BUS: NORMAL SEEKING |
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WHAT ARE THE POWER SUPPLIES TO ESSENTIAL SERVICE, IN ORDER OF PREFERENCE? |
BUS 18 (28) - VIA RECTIFIER MCC 1 (2) - VIA AUCTIONEERING DIODE BUS 17 (26) - VIA STATIC SWITCH MCC 18-2 (28-2) - VIA ABT |
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WHEN DOES THE DC SUPPLY FROM MCC 1 TO THE ESS UPS TRIP? |
TRIPS: 206 VDC
CLEARS: 214 VDC (MANUAL RESET REQ'D) |
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WHEN WILL THE STATIC SWITCH SELECT THE REGULATOR FROM BUS 17 VERSUS THE INVERTER? |
WHEN INVERTER OUTPUT VOLTAGE IS +/-10% RATED
NORMAL SEEKING. WILL RETURN TO INVERTER IF VOLTAGE RETURNS TO NORMAL |
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WHAT DOES THE ESSENTIAL SERVICE SYNCHRONIZATION CIRCUIT DO? |
SWAPS POWER TO BUS 17 IN THE EVENT THE INVERTER BECOMES OUT OF SYNCH WITH THE REGULATOR (INVERTER FAILURE OR SYNCH ISSUE FROM EDG) |
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IF THE ESS ABT IS BEING FED BY RESERVE POWER FROM MCC 18-2, WHEN WILL IT RETRANSFER BACK TO THE ESS UPS? |
MUST BE MANUALLY RESET
A LOSS OF 18-2 WILL DE-ENERGIZE ESS BUS |
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WHAT PLANT RESPONSE WILL OCCUR ON AN ESS ABT SWAPOVER? |
FUEL POOL AND RX BLDG RAD MONITORS FAIL UPSCALE RB VENTS ISOLATE SBGT STARTS RWCU ISOLATES 1A, 1B, 2A FRV's LOCKUP |
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WHAT ARE THE PERMISSIVES FOR THE INSTRUMENT BUS ABT? |
SWAPS AT 70% NORMAL VOLTAGE IF: >90% VOLTAGE >51 HZ ON OTHER POWER SUPPLY
NORMAL SEEKING |
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WHAT PROVIDES POWER FOR THE COMPUTER PERIPHERAL POWER SUPPLY? |
EITHER UNIT'S ESS BUS |
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WHICH ESSENTIAL SERVICE BUS POWER SWITCH MAY BE BYPASSED? |
THE STATIC SWITCH TO SELECT EITHER THE INVERTER (MCC 1 OR BUS 18) OR THE REGULATOR (BUS 17 ALTERNATE FEED) |
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IF THE INSTRUMENT BUS IS ALIGNED TO ITS RESERVE FEED AND MCC 15-2 FAILS, WHAT IS THE RESULT? |
ABT IS NORMAL SEEKING, SO IF 18-2 WERE AVAILABLE, IT WOULD BE POWERED FROM THERE
LOSS OF 1502 IN THIS CASE WOULD MEAN LOSS OF INSTRUMENT BUS |
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HOW DOES A LOSS OF INSTRUMENT BUS IMPACT FWLC? |
2B FRV LOCKUP |
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HOW DOES A LOSS OF ESSENTIAL SERVICE IMPACT FWLC? |
1A, 1B, 2A FRV's LOCKUP
RFP MIN FLOW VALVES OPEN (LEVEL LOWERS) |
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WHY DOES A LOSS OF ESSENTIAL SERVICE CAUSE A RWCU ISOLATION? |
ESS POWERS THE STEAM TUNNEL HIGH AREA TEMPERATURE RELAY |
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WHAT IS THE MAIN CONCERN ON LOSS OF THE INSTRUMENT BUS? |
FW HEATER NORMAL LEVEL CONTROL VALVES FAIL CLOSED AND EMERGENCY LCV's FAIL OPEN.
LOSS OF FEEDWATER HEATING
RMCS IS ALSO LOST SO CANNOT MOVE RODS TO RESPOND |
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WHY DOES A LOSS OF INSTRUMENT BUS CAUSE A ROD BLOCK? |
SDV HIGH LEVEL SENSORS POWERED BY INST BUS |
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WHAT IS THE PURPOSE OF THE ERV's AND TARGET ROCK? |
1) PREVENT OVERPRESSURIZING THE REACTOR COOLANT PRESSURE BOUNRARY
2) DEPRESSURIZE THE VESSEL TO ALLOW CORE SPRAY AND LPCI TO INJECT
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WHAT IS THE PURPOSE OF ADS? |
BACKUP TO HPCI TO DEPRESSURIZE THE VESSEL FOR SMALL BREAK LOCA TO ALLOW LOW PRESSURE ECCS TO INJECT |
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AT WHAT REACTOR PRESSURE TO THE ERV's AND TARGET ROCK OPEN? |
A (TARGET ROCK) 1135# B & C 1115# D & E 1135# |
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WITH THE RELIEF VALVE KEYLOCK SWITCH IN OFF, WHAT CAUSES RELIEF VALVES TO OPEN? |
AN ADS SIGNAL WILL STILL OPEN THE ERV'S
(OVERPRESSURE PROTECTION LOST) |
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WHY IS THERE A DELAY BETWEEN RELIEF VALVE OPENING AND CLOSING? |
WHEN VALVE CLOSES, STEAM IN THE DISCHARGE TAILPIPE CONDENSES, CREATING A WATER SLUG WHEN WATER IS DRAWN IN FROM THE TORUS
RE-OPENING TOO SOON WOULD CAUSE WATER SLUG TO IMPACT BOTTOM OF TORUS |
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WHAT PROVIDES THE SIGNAL FOR RELIEF VALVE POSITION ON THE 90X-3 PANEL? |
ERV'S: LIMIT SWITCH IN PILOT VALVE SOLENOID SHOWS ENERGIZED/DE-ENERGIZED
TARGET ROCK: ACTUATOR AIR PRESSURE |
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BESIDES INDICATING LIGHTS, WHAT INDICATIONS FOR RELIEF VALVE POSITON ARE AVAILABLE? |
ACOUSTIC MONITORS (ESS BUS)
TAILPIPE TEMPERATURES (INST BUS) |
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WHAT SIGNALS ACTUATE ADS? |
2.5# DRYWELL PRESSURE -59" CORE SPRAY/LPCI PUMP > 100# 110 SECOND TIMER
OR
-59" FOR 8.5 MINUTES WITH CORE SPRAY/LPCI >100# |
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WHY IS THE 8.5 MINUTE TIMER NEEDED FOR ADS? |
USED FOR LEAKS OUTSIDE OF DRYWELL
IF LEVEL NOT RESTORED IN 8.5 MINUTES, IT SHOWS HPCI IS NOT CAPABLE OF RESTORING LEVEL |
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ONCE ADS IS INITIATED, HOW CAN DEPRESSURIZATION BE TERMINATED? |
TIMER RESET PUSHBUTTON, OR
AUTO BLOWDOWN INHIBIT SWITCH, OR
TURN OFF ALL LOW PRESSURE ECCS PUMPS |
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HOW DOES THE DRYWELL PRESSURE RESET KEYLOCK AFFECT ADS? |
PREVENTS / DENERGIZES THE DRYWELL PRESSURE RELAYS
WILL PREVENT, BUT NOT TERMINATE, ADS DEPRESSURIZATION DUE TO LO-LO LEVEL AND HIGH DRYWELL PRESSURE |
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IF NORMAL POWER IS LOST TO 'B' ADS LOGIC AND IT IS FED FROM ITS RESERVE FEED, IS THE SYSTEM OPERABLE? |
NO. 'B' LOGIC WILL FUNCTION ON -59" FOR 8.5 MINUTES, BUT WILL NOT INITIATE ADS FOR DRYWELL PRESSURE AND -59" FOR 110 SECONDS |
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WHAT IS THE PURPOSE OF THE 110 SECOND TIMER IN ADS LOGIC? |
1) ALLOWS HPCI TIME TO RESPOND
2) ALLOWS OPERATOR TIME TO TAKE CONTROL AND EVALUATE IF SHOULD BE INHIBITED |
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WHAT ACTIONS ARE TAKEN IF A RELIEF VALVE LIFTS AND WILL NOT RESEAT? |
TAKE KEYLOCK FOR ERV TO "OFF"
CYCLE BETWEEN MANUAL AND AUTO
SCRAM REACTOR |
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WHAT IS THE DESIGN BASIS FOR THE RELIEF VALVES? |
DESIGNED TO OPEN ON A HIGH PRESSURE SIGNAL TO RELIEVE PRESSURE TO THE SUPPRESSION POOL
SIZED TO HANDLE A TURBINE TRIP WITHOUT BYPASS |
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WHAT IS THE DESIGN BASIS FOR ADS? |
BACKUP TO HPCI FOR SMALL BREAK LOCA
PROVIDE ADEQUATE CORE COOLING USING LPCI OR CORE SPRAY WITHOUT ADDITIONAL ENGINEERED SAFETY FEATURES |
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ON AN ADS INITIATION, WHICH RELIEF VALVES OPEN? |
ALL OF THEM SIMULTANEOUSLY |
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WHICH STEAM LINE HAS 2 RELIEF VALVES? |
'B'
3B AND 3E |
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WHICH STEAM LINE HAS THE TARGET ROCK? |
A |
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WHAT ARE THE CLOSING SETPOINTS FOR THE RELIEF VALVES? |
A 1090 B & C 1070 D & E 1090 |
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WHAT ARE THE THREE SIGNALS FOR OPENING A RELIEF VALVE? |
OVER PRESSURE
MANUAL DEMAND (KEYLOCK SWITCH ON -3 PANEL)
ADS INITIATION |
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WHAT IS THE INHIBIT LIGHT ON THE B & C RELIEF VALVES? |
14.5 SECOND TIME DELAY AFTER CLOSING |
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HOW DOES THE TARGET ROCK OPERATE IF DRYWELL PNEUMATICS IS LOST? |
ACCUMULATOR AND CHECK VALVE PROVIDES ENOUGH PRESSURE FOR 4-5 CYCLES WITH DRYWELL AT ATMOSPHERIC PRESSURE |
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WHAT IS THE PURPOSE OF THE RELIEF VALVE TAILPIPE VACUUM BREAKERS? |
2 VACUUM BREAKERS PER TAILPIPE MITIGATE WATER SLUGS IN THE DISCHARGE LINE AFTER VALVE CLOSURE |
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WHERE ARE THE RELIEF VALVE VACUUM BREAKERS? |
INSIDE THE DRYWELL ON THE RELIEF VALVE DISCHARGE LINES
2 PER LINE |
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WHAT IS THE POWER SUPPLY FOR ADS LOGIC? |
'A' LOGIC 125 VDC 1A-1 (2A-1)
'B' LOGIC 125 VDC 1B-1 (2B-1) (PARTIAL BACKUP FROM 1A-1 (2B-1))
A & B REDUNDANT, EXCEPT B ON BACKUP |
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WHAT IS THE NORMAL POWER SUPPLY TO TARGET ROCK AND RELIEF VALVE SOLENOIDS? |
RB 1 (RB 2) |
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WHAT IS THE RESERVE POWER SUPPLY TO TARGET ROCK AND RELIEF VALVE SOLENOIDS? |
1B-1 (2B-1)
AUTOMATIC SUPPLY, NORMAL SEEKING |
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PER ECCS INSTRUMENTATION TECH SPECS, IF ADS INITIATION CAPABILITY FROM DIV 1 AND DIV 2, WHAT IS REQUIRED? |
DECLARE ADS INOPERABLE WITHIN 1 HOUR |
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IF ADS OR A RELIEF VALVE HAS A FAILURE WITH EITHER HPCI OR A LOW PRESSURE ECCS SUBSYSTEM INOPERABLE, WHAT IS REQUIRED? |
ENTER LCO 3.0.3 IMMEDIATELY |
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WHEN IS RELIEF VALVE INSTRUMENTATION REQUIRED TO BE OPERABLE? |
MODES 1, 2, AND 3 |
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WHAT RELIEF VALVE INSTRUMENTATION IS REQUIRED TO BE OPERABLE? |
PRESSURE SETPOINT LIFT
REACTUATION TIME DELAY (B & C) |
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HOW MANY RELIEF VALVES ARE REQUIRED TO BE OPERABLE?
SAFETY VALVES? |
5 RELIEF VALVES
9 SAFETY VALVES |
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WHEN IS ADS REQUIRED TO BE OPERABLE? |
MODES 1,2,3, BUT NOT BELOW 150 PSIG |
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WHEN ARE THE LOW SET RELIEF VALVES REQUIRED TO BE OPERABLE? |
MODES 1,2,3
SEE TS 3.6.1.6 (CONTAINMENT SYSTEMS) |
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WHAT INDICATIONS FOR RELIEF VALVES ARE PAM INSTRUMENTS? |
ACOUSTIC MONITORS
TAILPIPE TEMPERATURES |
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WHEN WILL THE LOW-SET ERV'S OPEN BEFORE THE TIMER EXPIRES? |
MANUALLY (PROCEDURALLY NOT ALLOWED, BUT POSSIBLE) |
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HOW DOES A LOSS OF 125 VDC OR DRYWELL PEUMATICS IMPACT THE TARGET ROCK? |
INOP AS RELIEF VALVE
STILL FUNCTIONS AS SAFETY VALVE |
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WHERE DO THE RELIEF VALVES DISCHARGE? |
T-QUENCHERS 5' BELOW TORUS WATER LEVEL |
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HOW ARE THE -59" AND 2.5# SIGNALS DIFFERENT IN ADS LOGIC? |
-59" WILL REST IF LEVEL RESTORED
2.5 PSIG WILL NOT (SIGNAL SEALS-IN) |
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WHAT FAILURE WILL INOP THE TARGET ROCK VALVE SAFETY FUNCTION? |
BELLOWS RUPTURE (>25# SIGNAL WILL CAUSE ALARM) - VALVE INOP
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