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Remediation Objectives Flashcards

1
Q

LCO 3.7.12 “Fuel Handling Area Ventilation System” requirement

A

The Fuel Handling Area Ventilation System shall be operable with 1 fuel handling area exhaust fan aligned to the emergency filter bank and in operation.

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2
Q

LCO 3.7.12 “Fuel Handling Area Ventilation System” applicability

A
  • During movement of irradiated fuel assemblies in the fuel handling building when irradiated fuel assemblies with < 30 days decay time are in the fuel handling building.
  • During movement of a fuel cask in or over the SFP when irradiated fuel assemblies with < 90 days decay time are in the fuel handling building.
  • During core alterations when irradiated fuel assemblies with < 30 days decay time are in the containment with the equipment hatch open.
  • During movement of irradiated fuel assemblies in the containment when irradiated fuel assemblies with < 30 days decay time are in the containment with the equipment hatch open.
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3
Q

LCO 3.7.12 “Fuel Handling Area Ventilation System” required action if Fuel Handling Area Ventilation System not aligned or in operation, OR Fuel Handling Area Ventilation System inoperable

A

IMMEDIATELY suspend movement of fuel assemblies, suspend core alterations, and suspend movement of a fuel cask in or over the SFP

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4
Q

LCO 3.7.13 “Engineered Safeguards Room Ventilation (ESRV) Dampers” requirement

A

2 ESRV Damper trains shall be operable

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5
Q

LCO 3.7.13 “Engineered Safeguards Room Ventilation (ESRV) Dampers” applicability

A

Modes 1-4

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6
Q

LCO 3.7.13 “Engineered Safeguards Room Ventilation (ESRV) Dampers” required action if 1 or more ESRV Damper Trains inoperable

A

IMMEDIATELY initiate action to isolate associated ESRV Damper train(s)

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7
Q

What are the requirements for bypassing Feedwater Heaters?

A
  • Bypass heaters before lowering load
  • If any 2 stages of heaters are to be bypassed, turbine load is limited to < 600 MWe to prevent excessive extraction steam velocity in the next higher pressure heater.
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8
Q

What are the requirements for bypassing feedwater heater E-5A or B?

A

The associated E-6 feedwater heater is required to be removed from service, and turbine load is restricted to 600 MWe

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9
Q

What are the requirements for bypassing a feedwater heater E-6A or B?

A

Power shall be lowered to at least 3% below max permissible power level to prevent exceeding power limit due to introduction of cold feedwater.

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10
Q

Which feedwater heaters can be completely isolated during plant operations?

A

E-3A/B, E-4A/B, and E-6A/B, as they are the only heaters with BTVs

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11
Q

What is the purpose of the Steam Generator Water Level Control System?

A
  • To regulate feedwater flow such that feed flow matches steam flow, and S/G water levels are maintained within normal operating limits
  • To maintain indicated S/G level above the low S/G level trip setpoint, and below the high level override setpoint for a step load increase/decrease of up to 10% of rated, ramp load increases of up to 5% of rated per minute, and ramp load decreases of up to 15% of rated per minute.
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12
Q

What causes MSIV auto closure?

A
  • Low S/G pressure @ 500 psia 2/4 logic

- CHP @ 4 psig 2/4 logic

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13
Q

How is MSIV closure block achieved?

A
  • Blocked by pushing the push button when 3/4 channels of S/G pressure between 512 and 548 psia
  • 1 push button for each MSIV
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14
Q

How does the quick open feature work for the TBV and ADVs?

A
  • Quick open signal is generated when a turbine trip causes the 386AST relay to energize.
  • If Tave >= 556.9 F, the Steam Dump Control Relay is energized and closes contacts to align the quick open air supply solenoids to the TBV and ADVs to open the valves fully.
  • Valves will stay full open until Tave < 556.9 F
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15
Q

How does the modulate open feature work for the TBV and ADVs?

A
  • Once Tave < 556.9 F, modulating mode takes over.
  • TBV and ADVs will be full open at 556.9 F, and start modulating closed as Tave lowers, until they are full closed at 535 F.
  • When valves are full closed with Tave <= 535F, they won’t start modulating back open until Tave increases to 540 F.
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16
Q

What causes auto closure of the TBV?

A

Condenser vacuum < 5”

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17
Q

What is the steam capacity of the TBV and ADVs?

A

TBV - 4.5% of rated steam flow

ADVs - 7.5% of rated steam flow (30% total). Capacity is adequate to prevent lifting the code safeties

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18
Q

What Aux Feedwater indications are available in the control room?

A
  • P-8A/B flow to each generator
  • P-8C flow to each generator
  • P-8A/B discharge pressure
  • P-8C discharge pressure
  • AFW pumps amps
  • P-8B steam supply pressure
  • CV-0522B DC Control Power Available light
  • FOGG MOV positions
  • 2T-2 level indicators
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19
Q

What Aux Feedwater controls are available in the control room?

A
  • P-8A handswitch
  • P-8C handswitch
  • CV-0522B handswitch
  • Flow controller for P-8A/B to ‘A’ S/G
  • Flow controller for P-8A/B to ‘B’ S/G
  • Flow controller for P-8C to ‘A’ S/G
  • Flow Controller for P-8C to ‘B’ S/G
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20
Q

What Aux Feedwater indications are available outside the control room?

A
  • P-8A/B flow to each generator on C-33
  • P-8C flow to each generator on C-33
  • P-8A/B flow to each generator on C-150
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21
Q

What Aux Feedwater controls are available outside the control room?

A
  • P-8A/B flow controllers to each generator on C-33
  • P-8C flow controllers to each generator on C-33
  • P-8A/B flow controllers to each generator on C-150
  • CV-0522B handswitch on C-150
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22
Q

What Service Water indications are available in the control room?

A
  • Pump amps
  • D/G SW outlet temperature
  • CCW HX SW outlet temperatures
  • Critical header pressures
  • ESS Room Cooler temperatures
  • SW inlet temperature
  • SW outlet temperature
  • Radiation monitor
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23
Q

What Service Water controls are available in the control room?

A
  • ESS Room Coolers SW inlets
  • SW header division valves
  • Critical header isolations
  • Critical header cross-connects
  • Non-Critical header isolation
  • CAC SW supply and return valves
  • CCW HX SW outlets (high caps)
  • CCW HX TCVs
  • VC-10 and D/G 1-2 SW inlet
  • VC-11 and D/G 1-1 SW inlet
  • ESS pumps backup cooling supply inlets and outlets
  • CAC SW inlet and outlet CVs
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24
Q

What Service Water indications are available outside the control room?

A
  • Local SW temp
  • SW bay level
  • Traveling screen differential levels
  • Pump discharge pressures
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25
Q

What Service Water controls are available outside the control room?

A
  • CAC SW supply and return valves
  • CAC SW inlets and outlets
  • ESS pumps seal cooling valves
  • ESS rooms coolers SW inlets
  • CCW HX outlets (high caps)
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26
Q

LCO 3.8.4 “DC Sources - Operating” requirement

A

The left train and right train DC electricalpower sources shall be operable

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27
Q

LCO 3.8.4 “DC Sources - Operating” applicability

A

Modes 1-4

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28
Q

LCO 3.8.5 “DC Sources - Shutdown” requirement

A

DC electrical power source(s) shall be operable to support the DC electrical power distribution subsystem(s) required by LCO 3.8.10 “Distribution Systems - Shutdown”

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29
Q

LCO 3.8.5 “DC Sources - Shutdown” applicability

A
  • Modes 5 and 6

- During movement of irradiated fuel assemblies

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30
Q

LCO 3.8.5 “DC Sources - Shutdown” required action if 1 or more required DC electrical power sources inoperable

A

IMMEDIATELY

declare affected required feature(s) inoperable

                                OR

suspend core alterations, suspend movement of irradiated fuel assemblies, initiate action to suspend operations involving positive reactivity additions, and initiate action to restore required DC electrical power source(s) to operable status

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31
Q

LCO 3.8.6 “Battery Cell Parameters” requirement

A

Battery cell parameters for the left train and right train batteries shall be within limits

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32
Q

LCO 3.8.6 “Battery Cell Parameters” applicability

A

When associated DC electrical power source(s) are required to be operable

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33
Q

LCO 3.8.6 “Battery Cell Parameters” required action if 1 or more batteries with 1 or more battery cell parameters not within Category A or B limits

A

WITHIN 1 HOUR verify pilot cells electrolyte level and float voltage meet Category C limits

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34
Q

LCO 3.8.6 “Battery Cell Parameters” required action if required action and completion time not met, 1 or more batteries with average electrolyte temperature of the representative cells < 70 F, or 1 or more batteries with 1 or more battery cell parameters not within Category C limits

A

IMMEDIATELY declare associated battery inoperable

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35
Q

LCO 3.8.7 “Inverters - Operating” requirement

A

4 inverters shall be operable

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36
Q

LCO 3.8.7 “Inverters - Operating” applicability

A

Modes 1-4

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37
Q

LCO 3.8.8 “Inverters - Shutdown” requirement

A

Inverter(s) shall be operable to support the onsite Class 1E Preferred AC bus electrical power distribution subsytem(s) required by LCO 3.8.10 “Distribution Systems - Shutdown”

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38
Q

LCO 3.8.8 “Inverters - Shutdown” applicability

A
  • Modes 5 and 6

- During movement of irradiated fuel assemblies

39
Q

LCO 3.8.8 “Inverters - Shutdown” required action if 1 or more required inverters inoperable

A

IMMEDIATELY

Declare affected required feature(s) inoperable

                                OR

Suspend core alterations, suspend movement of irradiated fuel assemblies, initiate action to suspend operations involving positive reactivity additions, and initiate action to restore required inverters to operable status

40
Q

LCO 3.8.9 “Distribution Systems - Operating” requirement

A

Left train and right train AC, DC, and preferred AC bus electrical power distribution subsystems shall be operable

41
Q

LCO 3.8.9 “Distribution Systems - Operating” applicability

A

Modes 1-4

42
Q

LCO 3.8.9 “Distribution Systems - Operating” required action if 2 or more inoperable distribution subsystems that result in a loss of function

A

IMMEDIATELY enter LCO 3.0.3

43
Q

LCO 3.8.10 “Distribution Systems - Shutdown” requirement

A

The necessary portion of AC, DC, and preferred AC electrical power distribution subsystems shall be operable to support equipment required to be operable

44
Q

LCO 3.8.10 “Distribution Systems - Shutdown” applicability

A
  • Modes 5 and 6

- During movement of irradiated fuel assemblies

45
Q

LCO 3.8.10 “Distribution Systems - Shutdown” required action if 1 or more required AC, DC, or preferred AC bus electrical power distribution subsystems inoperable

A

IMMEDIATELY

Declare associated supported required feature(s) inoperable

                             OR

Suspend core alterations, suspend movement of irradiated fuel assemblies, initiate action to suspend operations involving positive reactivity additions, initiate actions to restore required AC, DC, and preferred AC bus electrical power distribution subsystems to operable, and declare associated required shutdown cooling train inoperable and not in operation

46
Q

What is the interlock associated with low suction pressure on a Main Feed Pump?

A

At 270 psig, Heater Drain Pumps Discharge Throttle Valve goes full open to ensure adequate NPSH for the Main Feed Pumps

47
Q

What are the Main Feed Pump trips?

A
  • Overspeed - 5500 rpm
  • Low governor oil pressure - 25 psig
  • Low bearing oil pressure - 9 psig
  • Thrust bearing movement - 12 mils north, 24 mils south
  • Low suction pressure - 250 psig
48
Q

What causes an automatic feedwater isolation?

A
  • CHP - closes both MFRVs and bypass valves
  • Low S/G pressure @ 500 psia - closes MFRV and bypass valve on affected S/G only
  • S/G high level override @ 84.7% - closes MFRV on affected S/G only
49
Q

What is the function of the Main Feed Pump Recirc Valves?

A
  • Provide minimum flow for the feed pumps
  • Modulate open based on feed pump flow
  • Full open at 3000 gpm, and full closed at 6500 gpm
  • Interlocked so if either of its associated T&T valves are open, it will modulate open. If both T&T valves are closed, then the recirc valve will close.
50
Q

How is hotwell level controlled?

A

Level is maintained 66-71% using an automatic 3” makeup valve, and a 4” reject valve that automatically modulates open @ 76%. Also available are a 6” manual makeup valve, and a 12” emergency makeup is available, but not used.

51
Q

What is the source for hotwell makeup and reject?

A
  • T-2

- Hotwell can be batched directly to the lake

52
Q

How is condensate minimum flow maintained?

A
  • 12” condensate recirc CV modulates based on flow

- Maintains minimum flow of 6800 gpm (1600 gpm to gland seal condenser, and 5200 gpm to air ejector condenser)

53
Q

How are PZR heaters normally aligned?

A
  • All backup heaters normally energized

- Proportional heaters modulate on/off based on PZR pressure control program

54
Q

What is the function of the PZR Spray CVs?

A
  • Modulate open/closed based on PZR pressure control program

- Bypass valve around spray valves throttled open to provide approximately 1 gpm spray flow

55
Q

What is the function of the Aux Spray CV?

A

Used to supply PZR spray flow from the discharge of the charging pumps when PCPs are not available (startups/shutdowns or when on natural circulation)

56
Q

What is the function of the PORVs?

A
  • Connected to the top of the PZR and relieve to the Quench Tank
  • Isolated by the block valves above 430 F
  • Controlled by the LTOP controller
57
Q

What is the function of the PZR Code Safety Valves?

A

3 safety valves connected to the top of the PZR and relieve to the Quench Tank at 2500 psia, 2540 psia, and 2580 psia

58
Q

What is the function of the PZR Pressure Controllers?

A

Maintain PZR pressure from 2010-2100 psia by sending signals to PZR Heaters and Spray Valves

59
Q

What is the function of the LTOP Control Units?

A

Calculate PORV relief setpoint based on cold leg temperature

60
Q

What is the function of the PZR Spray Nozzles?

A

1 spray nozzle at the top of the PZR that receives flow from the PZR Spray Valves and/or Aux Spray Valve

61
Q

What is the range of operation for the PZR Heaters and Spray Valves based on PZR Pressure Controller output signal?

A
  • Proportional Heaters are full on @ 0% output, and off at 33.3% output.
  • Spray valves are full closed at 66.7% output, and full open at 100% output.
  • Between 33.3% and 66.7%, heaters are off and spray valves are closed
62
Q

What is the LTOP trip and pre-trip setpoints?

A
  • Trip setpoint is calculated based on cold leg temperature.

- Pre-trip setpoint is 50 psi below the trip setpoint

63
Q

What provides automatic protective de-energization of the PZR Heaters?

A

Cut off at Low-Low PZR Level of 36% to prevent heater burnout

64
Q

What are the power supplies for the PZR Level Controllers?

A

LIC-0101A - Y-10

LIC-0101B - Y-20

65
Q

LCO 3.4.9 “Pressurizer” requirement

A

The pressurizer shall be operable with level < 62.8%, >= 375 kW of PZR heater capacity available from Bus 1D, and >= 375 kW of PZR heater capacity available from Bus 1E with the capability of being powered from an emergency power supply

66
Q

LCO 3.4.9 “Pressurizer” applicability

A

Modes 1-3

67
Q

LCO 3.3.7 “PAM Instrumentation” requirement as applicable to the PZR Level Control System

A

The PAM Instrumentation for Wide Range PZR Level

68
Q

LCO 3.3.7 “PAM Instrumentation” applicability

A

Modes 1-3

69
Q

LCO 3.3.8 “Alternate Shutdown System” requirement as applicable to the PZR Level Control System

A

The Alternate Shutdown System Functions for PZR Level and Pressure shall be operable

70
Q

LCO 3.3.8 “Alternate Shutdown System” applicability

A

Modes 1-3

71
Q

How does the relationship between SI flow and PCS pressure impact operation of the SIS?

A
  • As PCS pressure lowers, SI flow raises
  • HPSI flow begins injecting at ~ 1200 psia
  • SITs will inject at ~ 200 psia
  • LPSI flow begins injectins at ~ 170 psia
72
Q

Why is there a minimum flow limit for the Primary Makeup Controller FIC-0210A (used for dilutions)?

A

Flow rates between 5 gpm and 30 gpm may produce flow errors of up to 2 gpm

73
Q

LCO 3.4.7 “PCS Loops - Mode 5, Loops Filled” requirement

A

1 SDC Train shall be operable and in operation with >= 2810 gpm flow through the reactor core and either 1 additional SDC train shall be operable, or the secondary side water level of each S/G shall be >= -84%

74
Q

LCO 3.4.7 “PCS Loops - Mode 5, Loops Filled” additional notes

A
  • The SDC pump of the train in operation may not be in operation for <= 1 hour per 8 hour period, provided no operations are permitted that would cause reduction of the PCS boron concentration, and core outlet temperature is maintained at least 10 F below saturation temperature.
  • Both SDC trains may be inoperable for up to 2 hours for surveillance testing or maintenance, provided 1 SDC train is providing the required flow through the reactor core, core outlet temperature is maintained at least 10 F below saturation temperature, and each S/G secondary side water level >= -84%
  • Forced circulation (starting the first PCP) shall not be initiated unless S/G secondary temperature is <= reactor inlet temperature (Tcold), S/G secondary temperature is < 100 F above Tcold and SDC is isolated from the PCS and PCS heatup/cooldown rate <= 10 F/hr, or S/G secondary temperature is < 100 F above Tcold and SDC is isolated from the PCS and PZR level is <= 57%
  • P-50A and P-50B shall not be operated simultaneously
  • All SDC trains may not be in operation during planned heatup to Mode 4 when at least 1 PCS loop is in operation
75
Q

LCO 3.4.7 “PCS Loops - Mode 5, Loops Filled” required action if 1 SDC train inoperable and any S/G with secondary side water level not within limit

A

IMMEDIATELY initiate action to restore a second SDC train to operable, or initiate action to restore S/G secondary side water level to within limits

76
Q

LCO 3.4.7 “PCS Loops - Mode 5, Loops Filled” required action if 2 SDC trains inoperable, or SDC flow through the reactor core not within limts

A

IMMEDIATELY suspend all operations involving reduction in PCS boron concentration, and initiate action to restore 1 SDC train to operable status and in operation with >= 2810 gpm flow through the reactor core

77
Q

LCO 3.4.8 “PCS Loops - Mode 5, Loops Not Filled” requirement

A

2 SDC trains shall be operable, and either 1 SDC train in operation with >= 2810 gpm flow through the reactor core, or 1 SDC train in operation with 650 gpm flow through the reactor core with 2 of the 3 charging pumps incapable of reducing the boron concentration in the PCS below the minimum value necessary to maintain the required shutdown margin

78
Q

LCO 3.4.8 “PCS Loops - Mode 5, Loops Not Filled” additional notes

A
  • All SDC pumps may not be in operation for <= 1 hour provided no operations are permitted that would cause a reduction in PCS boron concentration, core outlet temperature is maintained > 10 F below saturation temperature, and no draining operations to further reduce the PCS water volume are permitted.
  • 1 SDC train may be inoperable for <=2 hours for surveillance testing provided the other SDC train is operable an in operation
79
Q

LCO 3.4.8 “PCS Loops - Mode 5, Loops Not Filled” required action if 1 SDC train inoperable

A

IMMEDIATELY initiate action to restore SDC train to operable status

80
Q

LCO 3.4.8 “PCS Loops - Mode 5, Loops Not Filled” required action if 2 SDC trains inoperable, or SDC flow through the reactor core not within limits

A

IMMEDIATELY suspend all operations involving reduction of PCS boron concentration, and initiate action to restore 1 SDC train to operable and in operation with SDC flow through the reactor core within limit

81
Q

LCO 3.9.4 “SDC and Coolant Circulation - High Water Level” requirement

A

1 SDC train shall be operable and in operation

82
Q

LCO 3.9.4 “SDC and Coolant Circulation - High Water Level” applicability

A

Mode 6 with refueling cavity water level >= 647’ elevation

83
Q

LCO 3.9.4 “SDC and Coolant Circulation - High Water Level” additional notes

A
  • The required SDC train may not be in operation for <= 1 hour per 8 hour period, provided no operations are permitted that would cause reduction of the PCS boron concentration
  • The required SDC train may be made inoperable for <= 2 hours per 8 hour period for testing or maintenance, provided 1 SDC train is in operation providing flow through the reactor core, and core outlet temperature <= 200 F
84
Q

LCO 3.9.4 “SDC and Coolant Circulation - High Water Level” required action if 1 required SDC train inoperable or not in operation

A

IMMEDIATELY initiate action to restore SDC train to operable and in operation, suspend operations involving a reduction in PCS boron concentration, suspend loading irradiated fuel assemblies in the core, and close all containment penetrations providing direct access from containment atmosphere to outside atmosphere

85
Q

LCO 3.9.5 “SDC and Coolant Circulation - Low Water Level” requirement

A

2 SDC trains shall be operable and 1 SDC train shall be in operation

86
Q

LCO 3.9.5 “SDC and Coolant Circulation - Low Water Level” applicability

A

Mode 6 with refueling cavity water level < 647’ elevation

87
Q

LCO 3.9.5 “SDC and Coolant Circulation - Low Water Level” required action if 1 SDC train inoperable

A

IMMEDIATELY initiate action to restore SDC train to operable, or initiate action to establish the refueling cavity water level >= 647’ elevation

88
Q

LCO 3.9.5 “SDC and Coolant Circulation - Low Water Level” required action if no SDC train inoperable or in operation

A

IMMEDIATELY suspend operations involving a reduction in PCS boron concentration, initiate action to restore 1 SDC train to operable and in operation, and initiate action to close all containment penetrations providing direct access from containment atmosphere to outside atmosphere

89
Q

Where does SDC take suction from, and discharge to?

A

Takes suction from Loop 2 Hot Leg, and discharges to all 4 Cold Legs

90
Q

What causes an auto start of the Containment Spray Pumps?

A
  • Armed by SIAS signal, then auto start on CHP.
  • If CHP clears, and pumps are shut off, pumps will not restart automatically if CHP comes back in, due to not being re-armed by SIAS
91
Q

What interlock is provided for Containment Spray Pump runout protection?

A
  • 1 Containment Spray Pump can only provide 2 things (out of 2 spray headers and 2 HPSI subcooling valves)
  • If only 1 pump is available (loss of C bus), then Spray Header Isolation Valve CV-3001 closes.
92
Q

When and how does the Containment Spray Pump suction swap from SIRWT to Containment Sump?

A
  • Swaps over on RAS (2% SIRWT level)
  • Suction valves from containment sump open, and suction valves from SIRWT close
  • Valve stroke timing is coordinated such that the sump suction valves open faster then the SIRWT suction valves close, to ensure suction source isn’t interrupted.
93
Q

What is required for an EDG to be operable?

A 
Jacket Water and Lube Oil >90F
Lube Oil <205F
Air Start Pressure >95# but <175#
Starting Air Tank Pressure >215#
Service Water available
Generator/Engine protective relays in service
Over speed is latched
Output Breaker is racked in with control power available
In UNIT (not in PARALLEL)
Voltage Regulator in AUTO
Crankcase covers installed
EDG Room ventilation
Outside Air <85F one fan in-service
Outside Air >85F two fans in-service

Advanced Systems (36 decks)

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