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ESWS - REACTOR
Terms in this set (80)
Type of the steam re-boilers on board.
Horizontally mounted shell and u-tube type heat exchanger with a capacity of 80,000lbm/hr.
Location of the steam re-boilers on board.
1a (#1 Reboiler)
4b (#2 Reboiler) shaft alleys.
State the different types or services (Loads) for the re-boiler.
1) 50# Service steam system
2) 100# Laundry steam system
3) Distilling plant air ejectors
4) Low Pressure Steam Drain Collecting Tank air ejectors
5) Auxiliary lube oil purifier heaters
6) Main lube oil purifier heaters
7) Auxiliary lube oil settling tank heating coils
8) Catapult cylinder lube oil tank heating coils
9) Sea chest steam-out connections
10) Decontamination sink heater coils
11) 25# steam reducing station (backup to DU feed heaters)
What is the purpose of the Catapult Steam System?
To provide a means to automatically maintain 450 psi steam pressure in each of the four catapult steam accumulators independently. Steam is provided from the reactor plant main steam system via four independent risers.
What is Catapult Supervisory Control (CSC)?
Reactor Departments interface with the catapult control system. This enables the reactor plant watch officer to limit the amount and rate that steam is supplied to the catapult steam system. CSC is normally not invoked. It is used only during certain reactor plant evolutions.
Function of the High Pressure (HP) air compressors.
Supply compressed air at 4,200 psi for propulsion plant and ship's service uses.
Location of the High Pressure (HP) air compressors.
2 high pressure air compressors in each Main Machinery Room 4th deck
Function of the Low Pressure (LP) air compressors.
LP air is supplied by 3 Ship's Service Air Compressors (SSAC) at 125 psi for propulsion plant and ship's service uses.
Location of the Low Pressure (LP) air compressors.
#1 SSAC is located in 1 Main Machinery Room.
#2 SSAC is located in 2 Reactor Auxiliaries Room
#3 in 2 MMR.
Describe the uses of HP control air.
High pressure air - EDG start air, Propulsion plant valves emergency closing air, Weapons elevators emergency supply, Aircraft elevator pressure flasks, catapults arresting gear and barricade engine dampening sheaves, arresting gear lubrication, emergency air breathing.
Describe the uses of LP control air.
Low pressure air - Propulsion plant usage, dental operating rooms, flight deck cameras, radar control panel air, pneumatic tool connections, air conditioning plants, laundry presses & dry cleaning units.
Define the following compressed air system parameters: High Pressure
Between 2000 and 5000 psi
Define the following compressed air system parameters: Medium Pressure
Define the following compressed air system parameters: Low Pressure
Usually between 0 to 150
State the type of distilling plants used onboard and their maximum daily distilling capacity.
4 Low pressure, flash type, 6 stage, distilling units capable of producing 100,000 gallons per day. 1&2 Located in #1 Main Machinery Room3&4 Located in #2 Main Machinery Room
State the function of the following major components: Potable water storage tanks
Used exclusively for storage of fresh drinking water. Tanks are equipped with a tank liquid level indicator, sounding tube, and an air escape. The sounding tube caps are fitted with locked caps to prevent substances from entering tanks.
How many Portable water storage tanks do we have onboard?
What are the locations of the portable water storage tanks?
There are 11 tanks under 1MMR and 15 tanks under 2MMR
Total capacity of portable water storage tanks?
485,859 gallons combined.
State the function of the following major components: Hypochlorinators/brominator
Used to treat stored water, freeing them from biological contaminants. Makes water safe to drink.
Function of the Emergency Diesel Generators (EDG)
Primary- Provide power to Reactor Fill Pumps in case of a Reactor Accident.
Secondary- Provide emergency electrical power if SSTG or HVSP fail.
-Provide 4160V and 60Hz
Location of the Emergency Diesel Generators (EDG)
#1&2 are located in Forward Emergency Diesel Generator Room (4-34-0-E)
#3&4 are located in Aft Emergency Diesel Generator Room (4-225-1-E)
Function of the Ship Service Turbine Generators (SSTG):
Convert Steam Energy into Electrical Power while underway.
-Provide 4160V and 60Hz
Location of the Ship Service Turbine Generators (SSTG):
#1 and #2 are located in #1 Main Machinery Room
#3 and #4 are located in #2 Main Machinery Room
Function of the Coolant Turbine Generators (CTG):
Provide variable frequency power to the Reactor Coolant Pumps to cool the Reactor
Location of the Coolant Turbine Generators (CTG):
#1 and #2 are located in #1 Reactor Auxiliaries Room
#3 and #4 are located in #2 Reactor Auxiliaries Room
Function of the Shore Power Risers
Provide 4160V 60Hz Power inport
-FWD Sponson located at 1-123-1-W
-Aft Sponson located at
Location of the Coolant Motor Generator (CMG):
#5 CMG is located in #1 Reactor Auxiliaries Room
#6 CMG is located in #2 Reactor Auxiliaries Room
Function of the Coolant Motor Generator (CMG):
Provide power to Reactor Coolant Pumps while in port.
How many Load Centers are onboard CVN 77?
38 Load Centers
How many types of 4160V pumps are on board CVN 77?
8 Reactor Coolant Pumps
4 Reactor Fill Pumps
Describe the basic flow of electricity from beginning to end.
Who is the Reactor Officer?
Reactor Controls (RC)
Responsible for the operation and maintenance of all ELECTRONIC equipment associated with the propulsion plants. Comprised of ETs.
Reactor Mechanical (RM)
Responsible for operation and maintenance of all reactor plant machinery located in the Reactor Auxiliary Rooms. Comprised of MMs.
Reactor Laboratories (RL)
Responsible for maintaining chemistry in reactors, steam plants, and re-boilers as well as radiological concerns for the ship. Comprised of MMs.
Reactor Electrical (RE)
Responsible for operating and maintaining all electrical equipment and systems in the propulsion plants. Comprised of EMs.
Reactor Propulsion (RP)
Responsible for operation and maintenance of all mechanical systems in the Main Machinery Rooms. Comprised of MMs.
Reactor Auxiliaries (RA)
Responsible for the maintenance and operation of the ship's emergency diesel generators. Comprised of ENs and MMs.
What is the definition of Reactor Scram
Emergency shutdown of RX
What is the definitionReactor Critical
Reactor is operating at a steady power level.
What is the definition -ORSE-
Operational Reactor Safeguards Examination. Yearly test to make sure the reactors are being operated safely.
What is the definition -MICA-
(Monitoring, Integrated Control and Automation System) Panel that the Throttleman sits at to control ship speed.
What is the definition -JOCELN-
(Joint Operating Control and Electrical Network) Panel the Load Dispatcher sits at to control Ships Electrical Power.
What does TLD stand for and what does it do?
Thermo Luminescent Dosimeter
Measures the amount of radiation member has received
EOS Watchstanders Responsibilities: Propulsion Plant Watch Officer (PPWO)
Responsible to the EOOW/RDO for supervision of assigned propulsion plant.
EOS Watchstanders Responsibilities: Throttleman
Sits at MICA. Operates Throttles to control ship speed
EOS Watchstanders Responsibilities: Reactor Operator
Senior Enlisted watch in EOS. Monitors and operates the reactor plant.
DCC Watchstanders Responsibilities: Engineering Officer of the Watch (EOOW)
Responsible to the OOD for the overall operation of all engineering aspects of the ship.
DCC Watchstanders Responsibilities: Load Dispatcher (LD)
Sits At JOCELN. Responsible to the EOOW for supervising operation of ship's central electrical distribution system.
Propulsion Plant Watchstanders Responsibilities: Chief Reactor Watch (CRW)
Responsible to the PPWO/PPWS for supervision of all watchstanders in the Reactor Room.
Propulsion Plant Watchstanders Responsibilities: Chief Machinery Operator (CMO)
Responsible to the PPWO/PPWS for supervision of all watchstanders in Main Machinery Room.
Propulsion Plant Watchstanders Responsibilities: Propulsion Plant Watch Supervisor (PPWS)
Responsible to the PPWO for supervision of operations in the assigned Reactor Room and Main Machinery Room.
Propulsion Plant Watchstanders Responsibilities: Engineering Laboratories Technician (ELT)
Responsible to the PPWO to monitor and maintain chemistry conditions in the primary and steam plant systems, and radiological concerns for the plant.
What is pollution abatement and how do we achieve it?
Minimizing the oily water discharge to sea.
Oily water is sent to the Oily Water Separator system where it is processed and separated into oil and water. The oil is sent to the Oily Waste Holding Tank to be pumped off to a truck once pier side and the clean water is sent overboard.
State the Purpose and Classify the Reduction Gears?
Reduces size of turbine. Takes high velocity low torque of the main engines and converts it to low velocity high torque for the shafts.
Speed reduction takes place in 2 stages.
Geometrically opposing gear teeth. Eliminates axial thrust
The high speed pinion drives 2 gears. Prevents gear climbing
Uses a quill shaft, gives characteristics of a longer shaft in smaller space
2nd gear is in front of 1st, therefore smaller gear housing
Discuss the purpose of the Main Engines (ME).
Convert thermal energy of steam from the steam generators to mechanical work to drive the ship's propellers
Main Engine Locations:
1 ME- #1 MMR STBD side
2 ME- #2 MMR STBD side
3 ME- #2 MMR PORT side
4 ME- #1 MMR PORT side
How many RPMs are in a Knot?
Approximately 5 RPM = 1 knot
What is the Max RPMs the ship can operate at?
What was the first nuclear powered vessel?
USS Nautilus (SSN-571)
Who was the father of naval nuclear power?
Hyman G. Rickover
What was the first naval nuclear powered surface ship?
USS Long Beach (CGN-9)
The second was the first and only nuclear powered destroyer. USS Bainbridge (DLGN-25); The Bainbridge was later reclassified to a cruiser (CGN-25)
What was the first nuclear powered carrier?
USS Enterprise (CVN-65)
State a source of fuel used for nuclear fission.
Fuel grade Uranium 235
State the type of reactor design used in naval nuclear propulsion.
A4W water moderated, water cooled pressurized closed loop design
Discuss how a nuclear reaction produces useable energy.
Nuclear fission of Uranium 235 releases neutrons and gammas which collide with hydrogen atoms in water to create heat energy.
Explain the basic heat transfer process used in a nuclear reactor and a steam generator.
State the advantages of nuclear propulsion over fossil fuel propulsion plants.
1) Cost effective
2) Less pollution
3) Longer periods between refueling
Discuss a simple one line diagram of a reactor plant to include:
2) Steam generator
3) Primary cooling pump
Primary coolant passes through the reactor and becomes heated, and then flows through the steam generator transferring heat via conduction. The cooled coolant is then sent back through the reactor by the reactor coolant pumps, thus repeating the cycle.
Describe the 4 phases of the basic steam cycle:
The basic steam cycle begins in the Deareating Feed Tank (DFT) where the feedwater is stored. (The feedwater is heated and deareated by low-pressure auxiliary exhaust steam, which comes from non-condensing turbines.) The feed booster pump takes suction on the DFT and discharges to the suction of the main feed pump, thereby maintaining a positive suction head on the main feed pump. The main feed pump discharges water into the steam generator. After the water is turned into saturated steam, it passes through the main steam stop valves and into the high-pressure turbine where thermal energy is converted into mechanical energy. It then expands into the low-pressure turbine, where still more energy may be extracted from it. The steam then enters the main condenser, where it is condensed (by seawater passing through the main condenser tubes) and stored in the condenser hotwell. The condensate pump takes the condensed steam (condensate) and pumps it through the air ejector condenser (where air and noncondensable gases are removed from the condenser) and back to the DFT. The cycle is completed when the condensate re-enters the DFT.
Function of the following included in a propulsion block layout: Main Machinery Room
Contains major equipment of the steam plant, including Main Engines, Ship's Service Turbine Generators, Distilling Units, High Pressure and Ship's Service Air compressors, and High Voltage Switchgear Rooms.
Function of the following included in a propulsion block layout: Reactor Auxiliary Room
Contains equipment to support operation of the Reactors and steam generators, including Coolant Turbine Generators, Main Feed pumps and Booster pumps, Deaerating Feed Tank, Reactor Plant Fresh Water Cooling System and Reactor Control Rod Power supplies.
Function of the following included in a propulsion block layout: Reactors
Use nuclear fission to create heat for use in steam generators
Function of the following included in a propulsion block layout: Ship's Service Turbine Generators (SSTGs)
Convert thermal energy in steam from the steam generators to high voltage electrical power for ship's service system
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