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51 Cards in this Set
- Front
- Back
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Liq RW
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1. Paraphrase the function of the Liquid Radwaste System.
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Answer: The Liquid Radwaste System collects, segregates, processes and disposes of the liquid wastes generated during normal operations, refueling, and maintenance.
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2. List the areas that the Reactor Coolant Drain Tank Subsystem collects drainage from.
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Answer: RCP #2 seals, excess letdown, reactor vessel flange leakoff, ECCS accumulator drains, PRT drains, Refuel Pool drains, and RCS Loop drains.
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3. The ______________________ is the "source" tank for Drain Channel A. A. Floor Drain Tank B. Recycle Holdup Tank C. Waste Holdup Tank D. Waste Evaporator Condensate Tank
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Answer: C. Waste Holdup Tank
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4. What do the Floor Drain Tanks collect? A. Containment leak offs that are highly radioactive and have a high tritium concentration. B. Miscellaneous liquid wastes with a high tritium concentration. C. Miscellaneous liquid wastes with a low tritium concentration. D. Miscellaneous detergent and chemical wastes.
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Answer: C. Miscellaneous liquid wastes with a low tritium concentration.
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5. Which effluent radiation monitor will isolate the liquid waste discharge valve should there be high radiation detected in the effluent sample stream being discharged? A. GE RE 92 B. BM RE 52 C. HF RE 95 D. HB RE 18
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Answer: D. HB RE 18
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6. What is the low level trip for the Floor Drain Tank Pumps? A. 4% B. 10% C. 14% D. 23%
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Answer: A. 4%
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7. Paraphrase the function of the Laundry Waste System.
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Answer: It collects the laundry water. If necessary, the water can be reused or processed and discharged.
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8. Which system provides makeup to the Laundry Water System? A. Demineralized Water System B. Reactor Makeup System C. Waste Monitor Tank B D. Potable Water
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Answer: B. Reactor Makeup System
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9. How are the Chemical Drain Tank contents processed? They are: A. directed to the Waste Holdup Tank and processed through Drain Channel A. B. directed to the Floor Drain Tank and processed through Drain Channel A. C. directed to the Waste Holdup Tank and processed through Drain Channel B. D. directed to the Floor Drain Tank and processed through Drain Channel B.
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Answer: D. directed to the Floor Drain Tank and processed through Drain Channel B.
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10. The Chemical Drain Tank contents are recirculated for sampling: A. using Floor Drain Tank pumps. B. using Waste Monitor Tank pumps. C. using the Chemical Drain Tank pump. D. using the Waste Evaporator Condensate Pump.
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Answer: C. using the Chemical Drain Tank pump.
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Lake Makeup Discharge
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1. The Make-Up Water Pumps are started from the Main Control Board using the __________________.
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1. Answer: Site Supervisory System
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2. The purpose of the Low Level Outlet Works is to __________________.
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2. Answer: provide a means of de-watering the Cooling Lake for repair and inspection of the lake dams and for water quality control
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1. How can the Make-Up Water Pump discharge valves be opened?
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1. Answer: valve must be manually opened using the hydraulic operator
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2. What process signal will trip the Make-Up Water Pumps?
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2. Answer: Low Level in the Intake afterbay.
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3. The Raw Water Pumps will trip on _________________.
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3. Answer: a low level in the MUDS water basin.
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Instruument Aid
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1. What types of loads are provided with instrument air and what types of loads are provided with service air? Answer: Instrument air is used for instrument and control operations while service air is used for service outlets, pneumatic tools, etc.
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Answer: Instrument air is used for instrument and control operations while service air is used for service outlets, pneumatic tools, etc.
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1. How many air compressors are available to supply the Instrument/Service Air System, if needed?
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Answer: 4 total, 3 Atlas-Copco and one Sullair.
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2. Which component is used to cool the discharge air from the compressor unit?
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Answer: An aftercooler.
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3. The air that is discharged from the Sullair compressor potentially has moisture content in it. How is this moisture removed?
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Answer: A refrigerated air dryer is used along with two cyclone separators.
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4. The air that is discharged from the Atlas-Copco compressors potentially has moisture content in it. How is this moisture removed?
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Answer: A desiccant filled air dryer, equipment with pre and after filters to ensure the air is clean of debris when it leaves the dryer.
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. Which system provides cooling water to the "C" Atlas-Copco compressor?
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Answer: Central Chilled Water System
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2. Which signal must be reset in order to close the supply breakers for Atlas-Copco compressors "A" and "B" after a load-shed signal is actuated?
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Answer: Safety Injection Signal
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1. If service air header pressure starts to decrease and continues to decrease, how are the Atlas-Copco compressors started to attempt to bring pressure back to normal?
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Answer: A low-pressure signal is generated from each compressor's receiver and processed through the sequencer to send a start signal to the appropriate compressor.
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2. An Atlas-Copco compressor trips. The initiating fault is clear. What manipulation is necessary to make the compressor ready for operation?
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Answer: The RESET/START switch is manipulated to reset the compressor trip.
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1. According to OFN KA-019, what is the pressure at which valve KA PV-11 can be re-opened after a decrease in air header pressure?
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Answer: Above 110 psig.
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2. At what pressure does the second standby Atlas-Copco compressor receive an automatic start signal?
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Answer: 112 psig.
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1. Which two plant systems are affected by Technical Specifications that have an interrelationship with the Instrument/Service Air System?
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Answer: Auxiliary Feedwater and Main Steam.
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2. Which components in the Instrument/Service Air System are included in Tech Specs and which Tech Specs?
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Answer: Containment Instrument Air Isolation Valve KA FV-29 for Containment Isolation Valves. It is not specifically for the Instrument Air System.
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IncoreInstrumentation
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Question 1: What is the primary function of MIDS?
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Answer 1: Precise measurement of neutron flux at specific locations to detect localized power peaking in the core.
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Question 2: Apart from the primary function of MIDS, what other functions does MIDS provide?
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Answer 2: 1. Confirm the existence of any flux tilt in the core as indicated by the excore nuclear instrumentation system. 2. Detect an incorrect fuel load pattern. 3. Detect or verify the existence of misaligned rods.
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Question 1: What is the function of the incore thermocouple system?
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Answer 1: Measure the coolant temperature at the outlet of selected core fuel assemblies.
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Question 2: How is the exit temperature of a fuel element that does not have an installed thermocouple determined?
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Answer 2: The exit temperature is estimated using data taken from adjacent fuel assemblies.
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Question 1: Explain the operation of a fission chamber.
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Answer 1: Lined with U-235 enriched U3O8. Fission causes massive ionization. Fission pulse is greater than alpha and gamma signals. Current flow measured to determine intensity of neutron flux. Operates in ion chamber region of gas-filled detector characteristic curve.
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Question 2: List the six transfer paths from the 6-path transfer device.
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Answer: 1. NORMAL 2. CALIBRATE 3. ALTERNATE (3) 4. STORAGE
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Question 3: MIDS contains two types of limit switches. What are they called and what do they do?
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Answer 3: Withdrawal limit switches - 1) Provides signal to console and manual control box indicating detector withdrawn; 2) Prevents operation of associated 6-path transfer until detector withdrawn from transfer so no jam occurs and; 3) Provides zero reference for measuring length of cable insertion for position measuring circuits in console. Safety limit switches - Stops detector from entering drive box, in case of malfunction of withdrawal limit switch, by removing electrical power from drive assembly gear motor.
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Question 4: What component forms the primary pressure boundary between the reactor coolant system and moveable incore detector system during normal operations?
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Answer 4: Swagelok seal at the seal table.
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Question 5: An instrumentation thimble has ruptured. The detector and cable are inserted and jammed in the core and can not be withdrawn. What action will be required to stop the loss of coolant?
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Answer 5: The associated manual isolation valve will have to be closed.
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Question 1: How many thermocouples are contained in the incore thermocouple system?
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Answer 1: 50
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Question 2: Explain the operation of a thermocouple.
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Answer 2: Whenever two dissimilar metals are joined at welded junction, a potential difference exists across the junction.
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Question 3: What component(s) serve as the pressure boundary between the reactor coolant system and the incore thermocouple system?
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Answer 3: Two conoseals
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Question 4: How many reference junction boxes for the incore thermocouple system are there and how many thermocouples does each serve?
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Answer 4: Two; 25
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Question 1: What aspect of fission chambers makes them particularly hazardous?
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Answer 1: They become extremely radioactive during use and can make a significant contribution to radiation levels below the reactor.
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Question 2: What three points concerning primary system leaks at seal tables should be remembered to minimize the risk of developing leaks at this location?
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Answer 2: 1. Flux thimbles should only be cleaned when RCS is depressurized. 2. Mating parts of seal table pressure fittings should be from the same manufacturer. 3. Pressure fittings should only be tightened or loosened when RCS is depressurized
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Heating and Cooling
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1. Describe the purpose of the Plant Heating System, Central Chilled Water System and the Freeze Protection/Heat Trace System.
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Answer: The Plant Heating (GA) System provides hot water to the heating coils and unit heaters of the plant Heating, Ventilation, and Air Conditioning (HVAC) Systems. The Central Chilled Water (GB) System provides chilled water to the cooling coils, located in various areas of the Power Block, which are part of the Heating, Ventilation, and Air Conditioning System (HVAC). The system also provides cooling water flow to Air Compressor C of the Service Air System (KA) and cooling water flow to the sample cooler in the Condenser Air Removal System Radiation Monitor (GE RE-92). The Freeze Protection and Heat Trace System is comprised of various subsystems designed to protect site and power block components from exposure to cold weather. Site related systems requiring heat trace/freeze protection are located in water treatment, waste water treatment, makeup discharge structure, blowdown discharge structure and circ water screenhouse. Power block systems using heat trace/freeze protection include essential service water, outside water storage tanks, boron heat tracing, caustic soda heat tracing, and the air sample line heat tracing for the process radiation monitors.
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2. The Central Chilled Water System uses ____________________ as makeup water. a) Condensate Storage Tank Reject water b) Demineralized Water Storage Tank water c) Service Water d) Potable Water
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Answer: Demineralized Water Storage Tank water
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3. Describe the (Outside Tank's) purpose and operation of the individual circuit pilot light.
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Answer: An additional feature for detecting abnormal operation of a heat trace circuit of an outside tank is an individual circuit pilot light. These pilot lights are mounted in small metal boxes at or near the ends of the heat trace circuit tape runs. The pilot lights are connected in parallel with the heat trace circuits. As long as the heat trace circuit is energized and they're no faults in the heater circuit, the pilot light will be illuminated. The lamps are neon and have a clear lens covering them. Not all circuits have these lamps associated with them.
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