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AEO Training Material > 3901 (4/29/14 - 5/2/14) > Flashcards

3901 (4/29/14 - 5/2/14) Flashcards

1
Q

What function does the Feed Ion Exchangers serve?

A

Removes lithium and fission products from the feed to reduce activity.

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1
Q

What function does Aux Steam serve for the NBAE?

A

Provides a heating source to both the Evaporator and the Feed Preheater.

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1
Q

What does the level indication of the Unit 2 MFP L/O Tanks measure?

A

The top 30 inches of the Tank.

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1
Q

Why do we have Air Assisted Check valves on our Feedwater System?

A

To keep the check valves out of the flow stream to prevent erosion of the valve.

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1
Q

What is the function of the Fuel Oil System?

A

Stores, transfers and supplies fuel oil for use in the EDG.

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2
Q

Describe how the Boric Acid Batches made.

A

800 gallons of Demin Water, heated by Aux Steam, agitated by an agitator, Boric Acid Bags are added to the Batching Tank through the Strainer to keep the Plastic Bags out. Can be sent to the BART or BAST’s.

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2
Q

What are the sources of water to the MFP Seal Water System?

A
  • Normally supplied from the CBP Discharge.
  • Backup supply is from the MFP Seal Water Pump which takes suction from either the CST (alternate) or the discharge of the Hotwell Pumps (normal).
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2
Q

What are the MFP Trips?

A
  1. Low Vacuum
  2. Overspeed
  3. Low Suction Pressure
  4. Low Lube Oil
  5. Excessive Bearing Thrust
  6. Safety Injection
  7. Hi-Hi S/G Level
  8. Rx Trip
  9. Manual
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2
Q

What’s the function of the EDG Lube Oil System?

A

To keep the EDG supplied with clean L/O at the proper temperature, both when the EDG is running or shut down.

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3
Q

What is the normal flowpath for the Unit 1 MFP L/O?

A
  1. Shaft-driven Pump
  2. L/O Cooler (1 of 2)
  3. L/O Duplex Filters
  4. Bearing Oil Header.
  5. L/O Return Header.
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4
Q

What are the trips on an EDG after a loss of DC power?

A
  1. Manual pull knob on the Worthington Panel
  2. Mechanical Overspeed
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5
Q

Why does Radiation Protection perform a survey of the sluice piping before and after sluicing?

A

Radiation levels higher than the pre sluice survey indicates stuck resin.

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6
Q

What are the four major steps involved in sluicing demineralizer resin?

A
  1. Loosen resin with Primary Water backflushing.
  2. Sluice resin to the Spent Resin Storage Tank with Primary Water.
  3. Leak check the demineralizer.
  4. Refil the demineralizer.
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6
Q

What indications/evolutions involving the NBAE need to be logged?

A
  1. NBAE Startup.
  2. NBAE Shut-down.
  3. Opening/Closing Stripping Column Drains.
  4. Pumping down the NBAE Bottoms.

(Be sure to include component details like start/finish levels/pressures, boron concentrations, etc.)

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6
Q

What is the capacity (Rx Power) of a single Main Feed Pump?

A

~65% Rx Power.

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6
Q

What will cause the auto-start of the MFP Seal Water Pumps?

A

15 psid between the MFP Seal Water Pressure & the MFP Suction Pressure.

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7
Q

What are the trips available on the EDG’s while modified for Appendix R operation?

A
  1. Mechanical Overspeed
  2. Trip Pull Knob on the Worthington Panel
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8
Q

How are the MFP’s ELO’s operated?

A
  • Air Open.
  • Spring Closed.
  • Ensures 4,000 gpm flow through the MFP’s.
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8
Q

What are the trips on an EDG following an Auto-start (SI/Load Shed)?

A
  1. Electrical Overspeed
  2. Generator Phase Differential
  3. Manual Push Button(CR/Local)
  4. Incomplete Start
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9
Q

What are the four basic parts to the NBAE?

A
  1. Feed System
  2. Concentrates System
  3. Heat Source
  4. Distillate System
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10
Q

What must be verified prior to breaking vacuum on the MFP Pump Condenser?

A

The MFP Condenser is isolated from the Main Condenser.

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11
Q

What are the potential sources of Boric Acid to the BAST’s?

A
  1. BART
  2. NBAE Bottoms
  3. Batching Tank
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12
Q

What does the Feedwater System provide during load changes?

A

Sufficient fluid capacity to accommodate changes due to expansion and contraction from temperature/pressure changes in the S/G’s.

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13
Q

How does the Reactor Protection System (RPS) support the Main Feedwater System?

A

Provides the Feedwater Isolation Signal.

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14
Q

What’s the function of the Woodward Governor of the EDG’s?

A

Maintains the engine speed while operating in any configuration.

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16
Q

How does Reactor Nitrogen interface with operation of the NBAE?

A

Supplies supplemental cover gas to the NBAE Condenser and CVCS HUT’s.

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16
Q

What Boric Acid concentrations are the BAST’s required to be maintained within?

A

6550-6990 ppm.

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16
Q

What’s the highest Boroc Acid concentration that we can send from the NBAE?

A

10,000 ppm

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17
Q

How do the EDG’s respond if it is currently running (Surveillance) and receives a Safety Injection Signal?

A

EDG output breakers trip open.

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18
Q

What are the close times of the MFW Feedwater Control Valves (FRV’s)?

A
  1. Normal close time: 20 seconds.
  2. Close time with FW Isolation Signal: 2-6 seconds.
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18
Q

What is the motive force for the EDG L/O system with the EDG running?

A

The Shaft-driven L/O Pump.

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19
Q

Describe Filling and Venting the MFPs.

A
  • Verify Aux L/O Pump I/S.
  • Perform Valve Lineup.
  • Verify MFP Seal Water I/S.
  • Check MFP ELO’s Closed.
  • Fail OPEN Inboard/Outboard Seal Water Valves by closing air supply to allow for pump casing to fill.
  • Vent Pump casing/piping at: Suction/Discharge vent Valve & Suction Strainer Valve.
  • Open MFP Suction valve equalizing valve.
  • Open air supplies to Seal Water Inboard/Outboard Valves.
  • Open MFP ELO’s.
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21
Q

How does Primary Water interface with operation of the NBAE?

A

Provides flushing water to the NBAE Condenser and Absorption Tower.

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21
Q

What is the highest Boron concentration that can be sent to the BAST’s?

A

8,000 ppm.

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22
Q

What size transient can the Feedwater System sustain?

A

10% step or a 5%/minute ramp load change, without Steam Dumps.

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22
Q

What is the Tech. Spec Level of the EDG Fuel Oil Storage Tanks?

A
  • 46,000 gallons.
  • Supports ONE EDG at full load for 7 Days.
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23
Q

What is the function of the Vapor Extractors of the MFP’s?

A
  • Remove moisture from the L/O Tank.
  • Maintain vacuum on the Tank to prevent oil leaks.
  • Located on the top of the Tank.
  • Controlled by a pushbutton (On or Off).
  • Power supplies: 1-TPC-CS (E), 1-TBP-BE (W).
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24
Q

What is the medium for slucing resin?

A

Primary Water in the Demin Sluice Header.

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25
Q

In the event of a failure of the NBAE Rupture Disk, what is the source of the steam you would see in the room?

A

The water in the NBAE Drum flashing to steam.

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26
Q

What were the effects of the Acid Spill of 2013?

A

Discharged 9400 gallons of 2.5-2.4 pH acid to the absorption pond.

7 day report to Michigan Dept. Evironmental Quality.

60 day report to the MDEQ.

Termination of the MUP Operator.

HAZMAT cleanup required to mitigate.

EC Change to trip the Acid Pump on High Day Tank level.

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26
Q

What percentage of Feedwater flow can a single string of HP Heaters maintain? How much for the HP Heater Bypass?

A
  1. 80% through a single string of HP Heaters.
  2. 20% through the HP Heater Bypass line.
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28
Q

What actions must be taken in the event of a rupture disk failure?

A
  1. Steam must be isolated.
  2. RP must be notified.
  3. NBAE must be shut down.
  4. AWAY must be initiated.
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29
Q

Where could Boric Acid be sent from the BAST’s?

A
  1. Other BAST’s.
  2. BART.
  3. Recirc Back to itself.
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30
Q

Where do the MFP’s take suction?

A
  1. The Suction Strainers from the Condensate System (CBP discharge).
  2. Heater Drain Pumps.
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30
Q

What’s the function of the EDG’s Crankcase Breather?

A

Remove oil vapors and minimize oil leakage from the EDG’s.

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31
Q

What is the purpose of the Main Feed Pumps?

A
  • Supply sufficient water at design temperature and pressure to the SG’s in normal/abnormal conditions.
  • Provide a reliable controlled source of water to the SG’s for heat removal of the Rx.
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32
Q

What does an AEO check on an EDG immediately after an Auto start?

A
  • Ensure it’s running properly
  • Realign the Jacket Water Pumps as necessary (One in Run & One in Standby)
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33
Q

What is the maximum level allowed in the CVCS HUT’s and why?

A

77% to prevent covering the sparger.

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34
Q

What’s the purpose of the Heaters in the BAST?

A

To minimize 02 levels in the BAST. NOT TO KEEP BORIC ACID IN SOLUTION.

36
Q

What function does the Evaporator Coil Drain Tank Serve?

A

Receives steam after it is used in the evaporator coils.

38
Q

How does the Condensate Storage Tank interface with the Main Feedwater System?

A

Provides a Surge Volume for changes in inventory during load changes.

39
Q

What is the function of the Jacket Water System on the EDG’s?

A
  • Provides cooling water to the engine (running).
  • Rejects heat of combustion to the ESW system (running).
  • Maintains the EDG’s warmed to ensure it comes up to speed within 10 seconds (Standby).
41
Q

How do we swap MFP L/O Filters?

A

Slowly turn the handwheel to allow for a complete fill and vent of the filter being placed in service.

42
Q
  1. What’s the location of the new SFP level instruments?
  2. Where are their indications read?
A
  1. On the Northwest (Unit 1) and Northeast (Unit 2) corners of the SFP.
  2. In their respective Control Rooms.
43
Q

What loads feed into the Passive Header?

A
  1. VCT Relief
  2. Accumulator Test Line
  3. BIT Relief
  4. BAE Feed Pump Recirc
45
Q

What is the motive force for the EDG L/O while in standby?

A

Before & After Pump.

45
Q

How do the EDG’s respond while in standby with a Load Shed followed by a Safety Injection?

A
  • EDG’s start and loads: CCW, ESW, AFW, NESW
  • (Safety Injection occurs) → (Load Conservation occurs)
  • Loaded Pumps trip
  • The following will load to the T-Bus: CCP, SI, RHR, CCW, ESW, AFW, & NESW
  • If a Containment Spray (Phase ‘B’) Signal is received the NESW Pump will trip and the CTS Pump will start.
46
Q

What are the functions of the NBAE?

A
  • Re-concentrate the boric acid in the letdown liquid recovered from the CVCS HUTs and send to: BAST’s, BART, or Middle CVCS HUT
  • Recover primary water for recycling: as makeup or dilution water to the RCS or for use in the PWST.
46
Q

What gives a FeedWater Isolation Signal?

A
  1. Safety Injection
  2. S/G Hi-Hi Level
  3. Rx Trip with low Tave
48
Q

Describe the MFP Seal Water system, including function and flowpath.

A
  • Prevents hot feedwater/steam from leaking into atmosphere.
  • A small amount leaks into the pump and the major portion flows outward to the drain.
50
Q

How is the NBAE protected against over-pressurization?

A

The rupture disk on the NBAE blows at 15 psi to protect the NBAE vessel.

52
Q

What feeds into the Active Header of the CVCS?

A
  1. Letdown
  2. RCDT Pump discharge
  3. BA Blender
  4. Monitor Tank Pumps
  5. SFP Pumps
  6. CVCS HUT Area Sump Pump (alternate flowpath)
  7. Concentrates Holding Tank Pumps
  8. CVCS HUT Recirc Pump
53
Q

Where does the Spent Resin Storage Tank drain to (water side)?

A

CWHUT on the 587’; NOT the Clean Sump Tank.

55
Q

What are the pressure parameters of the CVCS HUT’s?

A
  • Normal: 1 to 1.5 psig
  • Maximum: 10 psig
  • Safeties lift @ 12 psig
56
Q

How much flow does the MFP ELO’s ensure?

A

4,000 gpm.

57
Q

State the function of the Solid Waste Disposal System.

A

Provides for storage of spent resin until it can be removed from the plant.

58
Q

How long should it take an EDG to come up to rated speed following a Load Shed/Safety Injection?

A

10 seconds.

59
Q

How is the Fuel Oil delivered to the EDG from the Fuel Oil Day Tank?

A

Via the Shaft-Driven Fuel Oil Pump.

60
Q

How many FRV’s/FMO’s are required to remain Operable per Tech Specs?

A
  • Loss of one or more FRV’s/FMO’s would require Isolation/Shutdown within 72 hours.
  • Loss of one or more FRV’s/FMO’s within the same flowpath requires Isolation/Shutdown with in 8 hours.

(Modes 1-3 only)

62
Q

How does the Feedwater System Improve Plant efficiency?

A

Uses Turbine Bleed Steam to increase the temperature of the Feedwater at each Feedwater Heater Stage.

63
Q

Unit 1 gets a Train ‘A’ Rx Trip Signal with a low Tave. What Feedwater Valves (FRV’s & FMO’s) will get a Closed Signal?

A

All 4 Loops’ FRV’s (210-240) & all 4 Loops’ FMO’s (201-204).

64
Q

How do you determine that the demineralizer is filled and vented?

A

After the drain valve on the Demineralizer is closed level in the CWHUT will start to rise.

65
Q

What protective gear must be worn during resin replacement?

A

Eye protective gear.

66
Q

What is the area temperature in the BAST’s required to be maintained above?

A

63 ℉

67
Q

What departments coordinate with Operations to sluice resins?

A

R.P.

Chemistry

Fire Protection Supervisor

Maintenance

69
Q

What happens to the Main Feedwater Regulating Valves (FRV’s) upon a loss of all DC power?

A

The FRV’s Solenoids (XSO’s) de-energize and vent off the signal air to the Volume Boosters, failing the FRV’s Closed.

71
Q

What are some things we check on a MFP prior to starting?

A
  1. Proper L/O Tank level.
  2. Stop/Control Valves closed.
  3. Stop Valve above/below seat drains Open.
  4. Isolation valve upstream Stop Valve Open.
  5. Oil Pump(s) I/S.
  6. Start the Turning Gear.
  7. Set up Steam Packing Exhauster.
  8. Make sure all electrical breakers I/S.
  9. Establish exhaust vacuum.
  10. Verify required steam conditions ahead of stop valves.
  11. Verify Oil temperature is correct.
73
Q

What function does the Evaporator Condensate Demineralizer serve?

A

Removes boron carryover.

74
Q

What components of the NBAE does CCW cool?

A
  1. Evaporator Condenser.
  2. Vent Condenser
  3. Distillate Cooler.
75
Q

What are some of the parameters AEO’s check during an EDG run?

A
  • Turbo Speed
  • Turbo Pressure
  • Exhaust Manifold Temperatures
  • Turbo Exhaust Gas Inlet/Outlet Temperatures
  • Bearing Temperatures
  • Jacket Water Inlet Pressure
  • Fuel Oil Manifold Pressure
  • Lube Oil Manifold Pressure
  • Crankcase Vacuum
  • Jacket Water Inlet Temperature
  • Aftercooler Temperatures
  • ESW to Air Aftercooler Valve Position
  • Combustion Air Aftercooler ESW Inlet/Outlet Temperatures
  • Lube Oil Pump Discharge Temperature
  • Lube Oil Inlet/Outlet Temperature
  • Jacket Water Cooler Inlet Temperature
  • Lube Oil Cooler to Full Flow Lube Oil Strainer Temperature
  • Full Flow Filter
76
Q

What temperature is the L/O Heater Pump & Heater maintaining in the L/O Sump Tank?

A

100 ℉.

77
Q

What is the purpose of the Low Flow Feedwater Heating alignment?

A
  • Used during low-power, start-up, or an extended operation in Hot Standby to prevent thermal shock of the elbows at the nozzles in the S/G’s.
  • Bypass/Main Steam is supplied to the 5 & 6 Feedwater Heaters only.
78
Q

How do the EDG’s respond when in standby with a loss of power to the Safeguards Buses?

A
  • Load Shed occurs
  • Safeguards Bus feeder breakers open
  • EDG’s start
  • When EDG’s at 95% speed and 80% voltage, the output breakers close
  • Load Shed clears and loads sequence on:

CCW, ESW, AFW, NESW

79
Q

What is the purpose of the Feedwater System?

A

Provide a continuous flow of water at uniform temperature to all S/G’s under normal operating conditions.

80
Q

How do we loosen the resin bed?

A

Backflush of the demineralizers for 5 minutes with Primary Water.

80
Q

How does Bleed Steam interface with the Main Feedwater System?

A

Provides heating source to the Feedwater Heaters (U1: 5&6, U2: 4,5&6) from the High Pressure Turbine to improve Plant efficiency.

81
Q

What potential problem could be caused by leaving the Spent Resin Storage Tank drain valve open long enough to completely drain the water from the tank?

A

You could have a radioactive release through the drain line to the CWHUT; the CWHUT is vented to the plant vent header.

83
Q

What is the normal flowpath for the Unit 2 MFP L/O?

A
  1. Shaft-driven Pump
  2. L/O Cooler (Both)
  3. L/O Duplex Filters
  4. Bearing Oil Header.
  5. L/O Return Header.
85
Q

What changes will be made to the IFU as a part of the permanent installation?

A

Larger pumps/motors & a Soft Starter.

85
Q

What is the minimum level required to be in the EDG L/O Sump Tank?

A

395 gallons.

86
Q

What are the Normal Trips on an EDG?

A
  1. Manual
  2. Cardox Actuated
  3. Generator Overcurrent
  4. Generator Phase Differential
  5. Electric Overspeed
  6. Fuel Oil Pressure Low-Low
  7. Lube Oil Pressure Low
  8. Air Chest Pressure High
  9. Neutral Ground Overcurrent
  10. High Bearing Temperature
87
Q

What is the function of the EDG Fuel Oil Storage Tanks? What are the capacity requirements? Why?

A
  • Provides storage capacity for TWO EDGs’s (1 per unit).
  • 80% of the Storage Tank capacity allows for 8 hours at full load before we reach the Tech. Spec. value.
88
Q

Why should the NBAE level be maintained above 30% and what action should be taken if level is drained below 30%?

A
  1. Prevent uncovering the electric heaters while energized.
  2. Take the heaters to off.
89
Q

What is the function of the Soft Starter on the IFU?

A

Allows for a smoother start of the motor by cotrolling the amount of voltage admited to the motor upon startup. Once it reaches full speed the voltage reducing contacts are bypassed.

90
Q

What is the Active Header?

A

The header that is composed of inputs/flowpaths that AEO’s can realign and therefore isolate.

91
Q

What do AEO’s do to assist in aligning for Alternate Boration?

A
  1. Obtain an A-37 key.
  2. Unlock App. R ladder in West Charging Pump Room.
  3. Open 1/2-CS-294

(We don’t take credit for this flowpath for T.S.)

93
Q

How is fuel oil for the EDG’s delivered from the Fuel Oil Storage Tanks (Outside) to the Fuel Oil Day Tanks?

A

Via the Fuel Oil Transfer Pumps.

94
Q

State the function of the Spent Resin Storage Tank.

A

Allows spent resin storage from CVCS demineralizers, SFP deminerlizers, blowdown treatment demineralizers to allow decay of short-lived radioactive isotopes.

95
Q

How does the Ventillation System for the EDG’s maintain room temperature?

A

The Tempering Damper on the EDG Supply Fan is open when outside temperature is above 45 ℉ & closes when outside temperature is below 45 ℉.

96
Q

What’s the design of the new SFP level instruments?

A
  • 2 permanently fixed channels (1 primary & 1 backup)
  • Must remain functional until offsite resources can be deployed.
  • Must have alternate power sources.
98
Q

How often is the Upper Valve Gear Assembly lubricated during standby/running conditions of the EDG’s?

A
  • Standby: 2 minutes of every 4 hours.
  • Running: Continuously until til stopped, then within 6-8 minutes after shutdown.
100
Q

What is the function of the CVCS HUT’s?

A

Receive letdown liquid from the RCS and clean drains from other RCS components.

102
Q

What is the Passive Header?

A

The CVCS Header composed of inputs/flowpaths from select gas/water safety reliefs.

103
Q

What is the minimum level of the EDG Fuel Oil Day Tank?

A
  • 70 usable gallons (101.4 gallons).
  • Provides sufficient fuel for 16 minutes of operation.
104
Q

What is the purpose of the Emergency Diesel Generators?

A

Supply an independent, automatic emergency source of electrical power to he Safeguards busses if Normal and Reserve power are lost.

105
Q

What closing time is required on the Feedwater Isolation Valves (FMO’s)?

A
  • No required time for Tech Specs.
  • Should close within 44 seconds.
106
Q

What components do AEO’s operate to assist in aligning for Emergency Boration?

A
  • Open the breakers (1-ABV-A-R2C & 2-ABV-A-R2C)
  • Open 1-QMO-410 and/or 2-QMO-420 to bypass the Blender to the suction of the Charging pumps.
107
Q

Describe the function of the Duplex Oil Filters on the MFP’s.

A
  • Filters the oil going to the turbine and pump bearings.
  • One I/S, one in S/B.
  • Contains internal bypass that auto opens at 15 psid.
  • Should be swapped prior to reaching 10 psid.
  • Aligned so that properly swapping will not impede flow.
108
Q

How are the Feedwater Regulating Valves Operated?

A
  • Air Opened.
  • Spring Closed.
  • Manual Hand-wheel (will impede Open/Close capability).
109
Q

Which condensers do the MFP ELO’s go to?

A
  1. East MFP: ‘B’ Condenser
  2. West MFP: ‘A’ Condenser
110
Q

What action should you avoid when interacting with the new I/P (current to pressure) converters?

A

They’re designed to continuously bleed off air. Do not cover up the vent port. This could cause movement of the actuator.

112
Q

At what pressures do the Unit 2 AC & DC MFP L/O Pumps Auto-Start?

A

AC: 25 psig

DC: 7 psig

113
Q

What were the causes of the Acid Spill at Cook in 2013?

A
  • MUP Operator forgot the acid was transferring.
  • The Control Room was not aware of the acid transfer.
  • There was no pre-job brief.
  • The MUP Operator didn’t communicate the status of the MUP with the Control Room.
  • The MUP Operator didn’t advocate his position when asked to assist with another job.
  • The MUP Operator was overconfident.
  • The MUP Operator got complacent.
  • He didn’t learn from previous OE.
114
Q

Why do we stop a feed pump when opening the Stripping Column Drains?

A

To prevent pumping CVCS HUT’s water into the Clean Sump Tank via the Stripping Column Drains.

115
Q

What is the purpose of informing the Control Room when opening Stipping Column Drains?

A

There is the potential of having an uncontrolled Radioactive Release.

116
Q

Describe the function and design of the MFP Lube Oil Coolers.

A
  • Two 100% capacity (U1: 1 I/S & 1 S/B U2: Both I/S).
  • Cooled by NESW.
  • Arranged so that upon transfer flow is never lost.
  • Maintains Bearing Drain temperature at 140-160 ℉.
117
Q

What are symptoms of Gas Binding in the NBAE?

A
  1. Shell pressure steady or increasing with little/no distillate flow.
  2. Shell pressure control valve closed/nearly closed with pressure increasing.
118
Q

Who’s permission is needed before slucing a Demineralizer containing PRC-01 resin?

A
  • Operations, Chemistry, & Radiation Protection.
  • If the curie count is greater than 250 the Plant Manager must also grant permission before backflushing.
119
Q

What are the Unit 1 Aux. & DC L/O Pump Auto-Starts?

A
  1. Aux: 43 psig L/O Header Pressure.
  2. DC: 36 psig L/O Header Pressure.
120
Q

How does ESW support the operation of the EDG’s?

A
  • Removes heat from: Induction Air system, L/O System, & Jacket Water System.
  • Provides an emergency source of makeup to the EDG’s Jacket Water System.
121
Q

How does an EDG respond after a Safety Injection?

A
  • EDG Starts
  • EDG Output Breakers stay OPEN.

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