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LOIT 2020 exam prep > Exam 11 prep > Flashcards

Exam 11 prep Flashcards

1
Q

What is the purpose of PPS?

A
  • Assure SAFDL AND pressurizer safety limits are not exceeded during an Anticipated Operational Occurrence
  • Redundant and independent to ensure
    • No single fault will cause an actuation
    • No single fault will cause a loss of safety function
  • 4 separate (train) sensing channels
  • 6 logic matrices that contain relays to trip RTSGs
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2
Q

How does a loss of one PN bus affect PPS?

A
  • Loss of a single PN power supply: 2 RTSGs open (A & C OR B & D)
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3
Q

How does a loss of 2 or more PN buses affect PPS?

A
  • Loss of any 2 or more PN power supplies: Rx Trip
    • Also due to instruments losing power you will get a FULL ESFAS actuation. (Every signal except LOP)
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4
Q

What happens in PPS if a single parameter exceeds its trip setpoint?

What actions are required and how long do you have?

A
  • Single parameter exceeding trip setpoint: No trip only alarms
    • If the instrument is determined to be bad causing this trip then we will bypass it. (New logic is now 2 out of 3 instead of 2 out of 4)
    • 1 hour time limit to get this channel bypassed
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5
Q

What will happen in PPS if one parameter is bypassed in A train and its trip setpoint is exceeded in B train?

What actions are required and how long do you have to do it?

A
  • One parameter in bypass the same parameter has a trip on another channel: NO TRIP (Only 1 out of 3, needed 2 out of 3)
    • If this is also due to a failed instrument then within 1 hour 1 channel is placed in bypass and the other is tripped (this is done by I & C)
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6
Q

What should be done to the signals associated with PPS A if PNA is lost?

A
  • ALL signals on that associated cabinet should be bypassed.
    • Since these are pushbuttons that stay depressed even though power is gone the bypasses will still work
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7
Q

Which leg of ESFAS logic is responsible for valve group actuations? Pump group actuactions?

A
  • 1-3 leg (Valve group relays)
  • 2-4 leg (Pump group relays)
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8
Q

How does loss of a single PN bus affect the ESFAS portion of PPS?

A
  • Half leg trip on both A and B trains (same leg)
  • The bottom of the electrical circuit for initiation relays is basically “cross-connected” so you need contacts to open on both legs to cause a full actuation. (A SINGLE CONTACT GOING OPEN WILL NOT MOVE ANYTHING)
  • There is a fuse in the current return for each leg
    • IF this fuse were to blow then the associated relays of that leg will also de-energize causing an actuation of its associated components (half leg trips)
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9
Q

What type of manual initiation is available from B05?

What configuration will ensure complete esfas actuation?

A
  • Manual initiation of each channel is available for each train from B05
    • However there is a catch: FOR A FULL ACTUATION YOU MUST TAKE MORE THAN ONE CHANNEL TO INITIATE TO HAVE AN ACTUATION. (Also the 2 MUST NOT be same train A&C/B&D)
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10
Q

At the Aux relay cabinet, how are initiation signals manually initiated?

How are channels reset at the Aux relay cabinet?

A
  • Trip/Resetting @ Aux Relay Cabinet
    • To Reset ONLY 1 BUTTON PRESS IS NEEDED (for 1 Train)
    • To Initiate 2 BUTTONS ARE REQUIRED (for 1 train)
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11
Q

State the instruments, setpoints, and actions associated with:

VOPT

A

Safety NI’s

  • Fixed setpoint at 110% pwr
  • Variable at 9.7% above SS pwr
  • rate of change at 10.6%/min

Reactor trip

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12
Q

State the instruments, setpoints, and actions associated with:

HI LOG power

A

Log signal from middle safety NI.

  • >0.01%(1E-2%) pwr, (bypassed on startup at 1E-4%; will auto remove this bypass on going below 1E-4%)

Reactor Trip

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13
Q

State the instruments, setpoints, and actions associated with:

Hi LPD

A

Originates in CPCs

  • > 21kw/ft

Reactor trip

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14
Q

State the instruments, setpoints, and actions associated with:

LO DNBR

A

Originates in CPCs

  • < 1.34 dnbr’s

Reactor trip

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15
Q

State the instruments, setpoints, and actions associated with:

Hi Ppzr

A

PT-101A-D NR Ppzr

  • > 2383 psia

Reactor Trip

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16
Q

State the instruments, setpoints, and actions associated with:

LO Ppzr

A

PT-102A-D, WR Ppzr

  • < 1837 psia

Reactor trip

SIAS

CIAS

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17
Q

State the instruments, setpoints, and actions associated with:

LO Psg

A

SG 1: PT-1013A-D

SG 2: PT-1023A-D

<960 psia (variable)

Reactor trip

MSIS

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18
Q

State the instruments, setpoints, and actions associated with:

D/P across SG-1 and SG-2

A

SG 1: PT-1013A-D

SG 2: PT-1023A-D

  • >185psid between S/Gs

AFAS lockout

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19
Q

State the instruments, setpoints, and actions associated with:

LO Lsg

A

SG-1: LT-1113A-D WR

SG-2: LT-1123A-D WR

<44.2% Reactor trip

<25.8% AFAS

<20.3% DAFAS

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20
Q

State the instruments, setpoints, and actions associated with:

HI Lsg

A

SG-1: LT-1114A-D NR

SG-2: LT-1124A-D NR

> 91%

Reactor trip

MSIS

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21
Q

State the instruments, setpoints, and actions associated with:

HI Pcont.

A

PT-351A-D

> 3psig NR

Reactor Trip

SIAS

CIAS
MSIS

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22
Q

State the instruments, setpoints, and actions associated with:

HI HI Pcont.

A

PT-352A-D

> 8.5psig(8.06psig per ARP)

CSAS

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23
Q

State the instruments, setpoints, and actions associated with:

LO Flow-RCS

A

Loop 1: PD-115A-D

Loop 2: PD-125A-D

Variable

Reactor trip

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24
Q

State the instruments, setpoints, and actions associated with:

LO Lrwt

A

LT-203A-D

<9.4%

RAS

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25
Q

What protects the plant against a RCP shaft shear event?

A
  • “4” ∆P SG provided to protect against a RCP shaft shear
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26
Q

What does TS 3.3.1 require to be operable and in what modes?

A
  • “4” ∆P SG also provided to protect against a RCP shaft shear
  • Tech spec
    • T.S. 3.3.1 requires these channels to be operable in Modes 1 & 2
      • EXCEPT LOG POWER IS ONLY REQUIRED IN MODE 2 ONLY
    • T.S. 3.3.2 SG ½ Pressure and Log Power High are only parameters required in MODE 3.
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27
Q

What does HI Ppzr protect against?

A
  • High Pressurizer pressure (NR)
    • Protects against
      • Loss of Condenser Vacuum (AOO)
      • CEA Withdrawal From Low Power Conditions(AOO)
      • Chemical and Volume Control System Malfunction (AOO)
      • Main Feedwater System Pipe Break (Accident).
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28
Q

What does LO Ppzr protect against?

A
  • Low Pressurizer Pressure (WR)
    • Initiates SIAS/CIAS to protect against
      • SIAS (all inside containment)
        • LOCAs
        • MSLB
        • CEA ejection
      • CIAS
        • LOCAs (Inside or outside containment)
        • MSLB (Inside or outside containment)
        • FWLB (Inside containment)
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29
Q

What does LO Psg protect against?

A
  • Steam Generator Low Pressure
    • Initiates MSIS/Reactor Trip/∆P Lockout
    • Mitigates consequences inside or outside of containment for:
      • MSLBs
      • FWLBs
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30
Q

What does LO Lsg protect against?

A
  • Steam Generator Level Low (WR)
    • Rx trip (44.3%)
      • Protects against exceeding RCS design pressure during loss of heat sink event
    • AFAS (25.8%)
      • Maintains heat sink during a S/G Tube rupture event
      • As well as a MSLB or FWLB (Inside or outside containment)
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31
Q

What does HI Lsg protect against?

A
  • Steam Generator Level High (NR)
    • High trip is specific to preventing MOISTURE CARRYOVER to the TURBINE
    • Rx trip
    • MSIS
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32
Q

What does the LO Lrwt protect against?

A
  • Low RWT Level (9.4%)
    • Enough water left to not damage pumps during fill phase yet enough water to fill containment to allow recirculation to work.
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33
Q

How are the setpoints for LO Ppzr lowered during normal cooldown?

A
  • Setpoint Reset PUSHBUTTON
    • Lowers the Low PZR pressure setpoint by 400# from CURRENT pressure. 10 second delay for each push of the button.
      • This can be done all the way down to 400# pressure at which point the Low PZR pressure can be BYPASSED (amber light for permissive)
      • Can be bypassed at the following:
        • Bistable Control Panel (BCP)
        • Remote Operators Module ROM (B05)
        • RSP
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34
Q

How is Ppzr trip affected by pressurizing the RCS?

A

ON THE WAY UP

Bypass automatically removed @ 500# and will lag 400# until 1837# is reached.

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35
Q

How is HI log bypass placed or removed?

A
  • HI log bypass
    • Done between 10-4% & 10-2%. If not completed prior to exceeding 10-2% the unit will trip
    • Can be bypassed at:
      • BCP
      • ROM
    • Places itself automatically back in service @ <10-4%.
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36
Q

How is Psg setpoint lowered?

A
  • SG Press
    • Lo Steam Generator Pressure Pushbutton
      • Lowers S/G pressure setpoint to 200# less than the current S/G Pressure. 10 seconds must elapse as well before hitting it again.
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37
Q

How is DNBR/LPD trips bypassed?

A
  • DNBR/LPD (OP Bypass)
    • Automatically Removed at 10-4% going up
    • May be bypassed < 10-5%
      • Done by using the enable key to “allow” operators to insert the OP Bypass into the ROM on B05
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38
Q

What would happen if an attempt to bypass the same parameter across multiple PPS channels was performed?

A
  • Bypassing Parameters on PPS Cabinets
    • There is a priority. YOU ARE NOT ABLE TO PLACE THE SAME PARAMETER IN BYPASS ON MULTIPLE CHANNELS
    • It will automatically ensure 2 channels aren’t bypassed on the same parameter by removing one of the parameters from bypass
    • Priority: A→B→C→D. So if “B” is already in bypass for a parameter and “A” bypass button is pushed “B” will come out of bypassed. The same relationship exists for “B” to “C” (“C” would “lose”)
    • The same priority is available for being able to place a channel in test
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39
Q

What indication exists on the BCP that a pre-trip has been met and what will this cause?

A
  • NORMALLY ON GREEN LIGHT, will go out when a valid DNBR/LPD pre-trip from the CPC is causing a CWP
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40
Q

What happens to feed if AFAS 1-2 are manually initiated from B05 concurrent with a SG d/p lockout on one SG?

A
  • S/G D/P Lockout wins if initiation handswitch position is returned to its normal position.
    • If the manual initiation switches on B05 are left in the initiate position Aux FW will fill the generator until the operator does something
    • All 4 switches must be taken to initiate for a FULL actuation of AFAS
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41
Q

Describe DAFAS initiation requirements and what it will perform?

What will occur with regard to feed if a MSIS is received during a DAFAS actuation?

A
  • Initiation Requirements
    • 2409 psia
    • NO AFAS
    • NO MSIS
    • 2 out of 4 SG < 20.3% WR
  • YOU ONLY GET ONE FILL TO 40.8% WR and the DAFAS WILL NOT FEED ANYMORE
    • If you get a MSIS in the middle of a DAFAS actuation it will stop feeding. Pumps will remain running.
  • 8 keys to bypass DAFAS in the Aux Relay Cabinets - fun fact.
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42
Q

With regard to RAS, should it be manually initiated based on RWT level trending towards its setpoint?

Why or why not?

A
  • RAS should NEVER be manually initiated on trend this allows enough water inventory into containment
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43
Q

What happens to the LPSI pumps and miniflows on a a RAS initiation?

What operator actions are required and in what amount of time?

A
  • Operator action required w/in 5 min to close the RWT suction valves
  • LPSI shutsdown, mini-flows close
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44
Q

Where can an MSIS be initiated from?

A
  • MSIS
    • CAN BE INITIATED FROM RSP or B05 or Aux Relay Cabinet
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45
Q

Where can the SPS(supplementary protection system) be initiated from?

A
  • SPS
    • CAN ONLY BE MANUALLY INITIATED FROM SPLA CABINET IN THE FIELD
46
Q

What is the PTTI(power trip test interlock) and what will it do?

A
  • PTTI (Power trip test interlock)
    • Will trip DNBR and LPD (with no pre-trip) if NI Calibration switches are not in OFF or in event of voltage problems
    • Only if the DNBR and LPD on that channel is not bypassed
47
Q

What will occur if the Linear Calibration switch on the Safety ex core drawer is placed in a position other than OPERATE?

A
  • Placing the Linear Calibration switch on the ex-core safety channel NI drawer to other than the OPERATE position will cause a channel Variable Overpower trip.
48
Q

What will occur if the Logarithmic calibrate switch on the Safety ex core drawer is placed in a position other than OPERATE?

A
  • Placing the Logarithmic Calibrate switch on the NI drawer to other than the OPERATE position will cause a channel High log power trip.
49
Q

What will occur when depressing the TEST pushbutton on B05?

How do you reset this?

A
  • Depressing the TEST Push Button
    • Lights all three sections of the bistable status indicators on the ROM and similar indicators on the corresponding PPS cabinet BCP.
    • Releasing the TEST PB will extinguish only the BYPASS portion of the bistable status indicators.
  • Returns the white P (pretrip) and red T (trip) sections of the bistable indicators to their original state if the alarm or test condition has cleared.
    • Pre-trip and Trip lights will stay lit until this happens.
50
Q

What can occur if the Aux bldg vent condenser is allowed to overflow?

A

Aux Building HVAC

  • If the Aux Building Vent Condenser is allowed to overflow from either pump loss or flow path isolated the overflow will come out of aux building ventilation
51
Q

What do HAA-1 thru 6 and HAB-1 thru 6 do?

A
  • Separates ventilation into 2 sections. Below 100ft and 100ft and above
  • THERE IS NO OVERRIDE CAPABILITY FOR THESE DAMPERS
52
Q

What happens in the aux bldg hvac system at 3’6” water level in the AF pump room?

A
  • @ 3’6” high water level in the Aux Feed Pump Room there are 2 air operated dampers in EACH supply and exhaust duct.
    • 4 total 2 “A” train and 2 “B” train
      • These are powered by their respective PK busses
53
Q

What ensures there is negative pressure in the Aux bldg?

A
  • A SUPPLY AHU CANNOT BE STARTED unless an EXHAUST FAN IS ALREADY RUNNING
    • This is sensed by D/P across AFU fans
  • 2 SUPPLY AHU’s CANNOT BE RUNNING WITH JUST 1 AFU RUNNING
    • IF “A” AHU and “A” AFU are running and the “B” AHU is taking to start then the “A” AHU trips off to ensure just a 1 for 1 combo
      • This same pattern holds true if 2 “B” train units were running.
    • Here’s where it gets really silly
      • IF “A” AHU and “B” AFU are running and the “B” AHU is taken to start……it will not start
    • IF all 4 are running and a LOW D/P condition is sensed on the “B” AFU then the “A” AHU WILL TRIP
      • Same holds true for “A” AFU and “B” AHU
54
Q

What starts the respective charging rooms ACUs?

What is this room cooled by?

How is this ACU affected by a loss of air?

A
  • Charging Room ACU
    • Starts when the associated pump starts. Continues to run for 5 min after the pump is shutdown.
    • Cooled by normal chill water
    • Remember on a loss of air to the air coolers it fails to FULL COOLING
55
Q

How do the CEDM cabinet room ACUs operate and what happens on a startup/shutdown to WC valves?

A
  • CEDM Cabinet Room ACUs
    • WC valves open when the unit is started and close when the unit is stopped. Then controlled by a temp controller
56
Q

With regards to the essential pump room ACUs, when do they start and stop?

What exception exists for the AFA pump room?

A
  • All Motor Operated Pump Room ACUs start concurrent with a pump start and will run for 5 min after the pump is secured
  • AFA
    • ACU STARTS WHEN ONE OF THE BIG STEAM ADMISSION VALVES LEAVES IT’S FULLY CLOSED POSITION
    • Turns off: 5 min after BOTH Steam admission valves are fully closed.
57
Q

What starts teh E-PEN ACU and how is it secured?

A
  • E-PEN ACU
    • Will start on a SIAS or LOP must be manually secured at the local switchgear.
58
Q

How must manually starting ACUs be performed?

A

One must manually start EW, EC and SP before starting the ACU so that cooling is available.

59
Q

What is the TS limit for containment pressure during normal operations?

A
  • Tech Spec Limit for Containment Pressure
    • -0.3 psig to 2.5 psig
      • Corresponds to an indicated pressure of -0.3 psig to 1.8 psig
60
Q

What cools Cont normal ACUs and how are they operated?

A
  • Cooled by Normal Chill Water (WC!)
  • ACU’s take suction on the 120ft. and discharges to the 100ft and the 80ft
  • A & B or C & D ACUs operate in pairs
    • Each pair share a common discharge duct.
  • Class PG Load Center power
61
Q

What is the auto start feature with the Cont ACUs?

A
  • Fans will auto start 60 secs after a sensed low D/P as long as the control room switch is green flagged.
  • Amber light indicates an auto start. Like other amber lights it really is saying that the fan started somehow with the switch in the green flagged position
62
Q

What cools the CEDM ACUs?

What is its normal configuration and what is the capacity of the ACU?

A
  • Cooled by NC!
    • NC is applied to the cooling unit when it’s associated fans are ionstarted by a motor operated valve
  • ACU’s take suction through the cooling unit and discharge out of the top
    • 1 fan can handle the total heat load though 2 are usually running
  • Both ACU’s are supplied from a common suction.
  • Powered from Class Load Centers PG
63
Q

What is the auto start of the CEDM ACUs?

A
  • Standby Units will auto start on a low D/P @ 120 secs after low D/P
    • CEDM ACUs should always use the standby feature start CEDM to allow for the 120 secs for the fans to stop spinning in the reverse direction
64
Q

When should the CEDM ACUs be placed in operation?

What action is required if CEDM cooling is lost when RCS is > 300F?

A
  • ACUs must be in operation prior to >225F RCS temp
  • If CEDM cooling is lost and RCS Temp >300F then CEDM cooling must be restored or the CEDM must be de-energized w/in 40 minutes
65
Q

How do the CEDM and Cont normal ACUs operate during a SIAS?

During a LOP?

A
  • SIAS
    • Containment Normal & CEDM ACUs stop on a SIAS
      • May be overridden
    • Once the SIAS signal is RESET then the CR Operator must take the handswitch to STOP to reset the SX relay and allow for normal fan operation
  • LOP
    • Running Containment Normal and CEDM ACUs will load shed and then be restarted by the sequencer ~ 55 secs into the sequence
66
Q

How do the Rx cavity fans and Pzr normal fans operate?

A
  • Reactor Cavity Fans & Pressurizer Normal Cooling Fans
    • Powered by SIAS LOAD SHED PANELS
    • Both will auto start the opposite fan on a sensed low D/P
67
Q

How do the MSSS supply fans operate?

A
  • Normally 1 AHU and 1 Filter is running while the other is standby
  • Standby fan will auto start on low D/P
  • 2 exhaust fans are installed to remove heat from the MSSS 100’ and above.
    • Each fan takes suction on one side of the MSSS and therefore both are normally running.
68
Q

What direction and speed does the bridge move?

A

Bridge moves at 50ft/min in an east/west direction

69
Q

At what direction and speed does the Trolley move?

A

Trolley moves at 30ft/min in a north/south direction

70
Q

At what direction and speed does the hoist move?

A

Hoist moves at 40ft/min in the up/down direction

71
Q

When is the following stopped on the hoist?

Upmotion:

Downmotion:

A

At up limt and overload

At cable slack and underload

72
Q

What prevents raising the new fuel elevator when loaded with fuel?

A

Interlock. has bypass key.

73
Q

What does the Mast bumper obstruction override do?

A

Allows bridge movement off of an obstruction that contacted the mast.

74
Q

What does the hoist underload interlock bypass do?

A
  • must be pulled out when lowering an empty grapple
  • Bypass auto clears on up motion or cable slack condition or pushing interlock in
  • Hoist Underload Interlock stops inward hoist motion in fuel region if load drops 150 lbs < expected load
75
Q

How much stress can the fuel spacer guides withstand and when does this likely occur?

A

Fuel spacer guides can withstand 200 lbs of shear stress (caught on adjacent assembly)

76
Q

What does the Hoist overload interlock bypass do?

A

Hoist Overload Interlock Bypass – bypassed overload (used when hoist box being picked up)

77
Q

What does the bridge trolley lockout do?

A

Bridge/Trolley Lockout prevents motion if hoist is energized, hoist < grapple elevation, spreader expanded

78
Q

What does the Fuel load extended interlock do?

A

Fuel Load Extended - prevents bridge/trolley motion if fuel extended below hoist box

79
Q

What does the hoist lockout do?

A

prevents hoist motion when bridge/trolley is moving

80
Q

What does the mast bumper interlock do?

A

stops bridge/trolley if mast driven into obstruction (can override to move trolley)

81
Q

When can the bridge/trolley speed interlocks be applied?

A

allow fast speed in Core Clear Zone at up limit

82
Q

What does the upender vertical interlock do?

A

prevents driving RM over upender if not vertical

83
Q

What does the cable slack load interlock do?

A

prevents hoist down motion when cable tension nears zero, cleared by raising hoist

84
Q

What does the spreader extended interlock do?

A

prevents bridge/trolley motion with spreader down (extended)

85
Q

What does the grapple rotate hang up interlock do?

A

prevents hoist operation if grapple not fully open or closed

86
Q

What does the bridge/trolley stop do?

A

prevents collision with wall

87
Q

What doest he UGOZ do?

A

prevents hoisting up with grapple open in UGOZ

88
Q

What does the unstop interlock do?

A

prevents hoist operation when max up limit reached

89
Q

When is the hoist manual mode used?

A

only to put fuel in safe location, testing, maintenance, fuel assembly not seating correctly

No interlocks when moving RM with manual handwheel

90
Q

Why should any fuel being inserted in the vessel have support from 2 sides?

A

flow rotates fuel

91
Q

Why shouldnt the grapple operate at cable slack?

A

damage to grapple

92
Q

What does the TM winch overload do?

A

stops winch on overload (800 lbs) – can override by changing setpt and using HIGH setting

93
Q

What does the TM winch carriage drive do?

A

prevents carriage movement if upender is not horizontal

94
Q

What does the TM upender rotation/carriage do?

A

prevents upender operation if carriage not properly positioned in upender

95
Q

What does the TM upender rotation/refueling interlock do?

A

prevents upender operation to vertical if RM or SFHM over upender

96
Q

What does the SFHM Hoist underload overload interlock do?

A

stops hoist, cleared by moving hoist inward, can bypass underload

97
Q

What does the SFHM Cable slack interlock do?

A

stops hoist to prevent winch damage due to drum over-rotation

98
Q

What does the SFHM Bridge/Trolley slow speed interlock do?

A

fuel on hoist and hoist not at up limit

99
Q

What does the SFHM travel limit do?

A

prevents fuel from being driven into SFP walls

100
Q

What does the SFHM Upender vertical interlock do?

A

prevents entry into transfer canal if upender is not vertical, can be bypassed

Not bypassed unless tube gate valve closed and carriage in CNMT

SM controls key

101
Q

What does the SFHM hoist up/down limit do?

A

max/min hoist travel limits reached

102
Q

What does the SFHM New Fuel Elevator interlock do?

A

prevents SFHM trolley from entering transfer canal unless elevator at down limit

103
Q

What does TRM T3.9.103 restrict?

A

loads > 2000 lbs prohibited from travelling over fuel in SFP

104
Q

Who is required for fuel movement in the following locations:

Cont.

FB

CR

A
  • Containment
    • Refueling SRO
    • Machine Operator
  • Fuel Building
    • Fuel Handling Supervisor
    • Machine Operator
  • Control Room
    • Reactor Engineering
    • Licensed RO or SRO
105
Q

Who gives permission to alter the movement sequence of fuel?

A
  • Altering the movement sequence of fuel
    • Agreement between Reactor Engineering and Refueling SRO. Final confirmation given by CRS or SM for verbal approval.
106
Q

What actions shluld be taken if communications are lost while moving fuel?

A
  • If communications are lost: SUSPEND FUEL MOVEMENT
107
Q

What are the COLR requirements for fuel movement?

What should be done if a possible boron dilution event has occurred?

A
  • Minimum Boron Concentration: >/= 3000 ppm to ensure a keff = 0.95
  • If there is a question of a possible dilution event or boron concentration < 3000 ppm then perform the following:
    • STOP CORE ALTERATIONS
    • SUSPEND POSITIVE REACTIVITY ADDITIONS
    • INITIATE EMERGENCY BORATION IMMEDIATELY
108
Q

What defines Core Alterations?

A
  • Defined as: movement or manipulation of any fuel, sources, or reactivity control components w/in the reactor vessel with the vessel head removed and fuel in the vessel.
    • Examples:
      • CEA Coupling/Uncoupling
      • UGS Removal/Installation
      • Fuel/CEA/Souce Movement
        • Exception: First or last bundle in the core
      • Fuel Realignment After Fuel Position Verification
      • UGS Lift Rig CEA Support Plate Raised or Lowered W/CEAs LATCHED
109
Q

What are the transfer canal level requirements for moving…

CEAs:

Fuel:

A
  • Moving CEAs
    • 23’ above the top of the fuel seated in the vessel corresponds to (122’1” on WR!)
    • Based on Rad levels
  • Moving fuel
    • 23’ above the top of the reactor vessel pressure flange corresponds to (137’4”)
    • Based on absorbing Iodine during fuel handling accident
  • If at any time the water level requirement is not met STOP MOVING THINGS
110
Q

What conditions require immediately suspending core alterations and positive reactivity additions?

A
  • Boron concentration not within limits
  • Any containment penetration doesn’t meet tech spec closure
  • Any S/U Channel INOP
  • Water level doesn’t meet >23’ requirement
111
Q

What is the procedure required refuel pool level for moving fuel?

A
  • Per procedure REFUEL POOL LEVEL SHALL BE > 137’9” DURING MOVEMENT OF IRRADIATED FUEL ASSEMBLIES

LOIT 2020 exam prep (12 decks)

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