NGT95

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Purpose of the reactor core

produce 3990 MW of thermal power
Major Components of the reactor core
- 241 fuel assemblies
- 89 control element assemblies
Major components of fuel assemblies
- Fuel spacer grids (11 per assembly)
- Upper end fitting
- holddown plate
- lower end fitting
- Guide tubes (5 per assembly)
- Fuel rods (236 per assembly)
- Burnable poison rods (0, 12, or 16 per selected assembly)
- Outer guide tubes, spacer grids, and end fittings from the structural frame of the assembly
Purpose of the reactor coolant system (3)
- Transfer thermal energy from the reactor core to the steam generator
- To serve as the secondary barrier to the release of fission products from the reactor core to the environs
- To provide sufficient core cooling during all normal plant evolutions and expected transients to preclude significant fuel damage.
Major components of the reactor coolant system
- Reactor Vessel
- Two parallel heat transfer loops - Each loop contains one steam generator and two reactor coolant pumps
- Pressurizer - connected to loop 1 hotleg of the reactor vessel outlet pipes
- Piping
- Safety valves
- Intrumentation
Purpose of the pressurizer (3)
- Maintain Reactor Coolant System in the subcooled condition
- Act as a surge volume to minimize pressure changes during load transients
- Ensure primary system integrity by preventing overpressurization
Function and summary of steam generator
- Transfer 4013 MWT from the RCS to the secondary system
- Produces about 18*10⁶lb/hr of 1031 psia saturated steam when provided feedwater at 450 degrees F
- Vertical U-tube heat exchanger
- Primary chamber located at the bottom
Purpose of vertical U-tube heat exchanger

To transfer heat from reactor coolant to the main steam system
Location and purpose of the primary chamber
- Located at the bottom of the steam generator
- Form part of the RCS pressure boundary
- Directs reactor coolant flow through the steam generator
Details of primary chamber

Divided into two plenums (inlet and outlet) by divider plate and staytube
What does the containment building house?
- Steam generators
- Reactor
- Primary piping
What does the auxilary building house?

Equipment to maintain the volume and chemical composition of the primary system coolant
Purpose of the fuel building
- Fuel prep and storage prior to use
- Storing and cooling of spent fuel
What are the contents of the radwast building?

Systems to monitor, serparate, and package the release of radionuclides
Contents of control building
- Control room
- Instumentation
- Cabling
- Cintrol reated support equipment

Author

Harley.Rachael

163961

Card Set

NGT95

Description

Intro to plant systems

Updated

2012-07-26T06:17:34Z

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