Reactor Coolant System Flashcards
(20 cards)
What is the Reactor Coolant System flow path?
Reactor - steam generator - reactor coolant pump - reactor
How much heat is the reactor coolant system removing during normal operation?
4013 MWt
What is the purpose of the reactor core?
produce 3990 MWt
How many Control Element Assemblies are in the Reactor Core?
89 CEAs
What power is supplied to the Reactor Coolant Pumps?
13.8 kV non Class power
What is the purpose of the Reactor Coolant Pumps?
Provide her for flow
Add heat to the RCS
What is the purpose of the Thrust Bearing in the RCP?
Provide axial support
What is the purpose of the Journal Bearing in the RCP?
Provide Radial Support
What cools the seal assembly of the Reactor coolant pumps?
Charging from the CVCS
What is the purpose of the Flywheel?
Increase Coast down time
What is the purpose of the Pressurizer?
maintain the RCS in a subcooled condition
Where is the Pressurizer connected to the Reactor Coolant System?
injection connected to loop 1 hot leg
spray connected to loop 1 cold leg
How many safety valves does the pressurizer have?
4
What is the ideal saturation of the Pressurizer?
2250 psia
How is pressure in the Pressurizer maintained?
Pressurizer Pressure Control System using heaters and spray
What is auxiliary Spray?
Backup to the Pressurizer Main Spray provided by the Charging Pumps of the CVCS
How is pressurizer level maintained?
Pressurizer Level Control System using Letdown control valves and Charging Pumps
What happens if pressurizer level is 3%, 9%, 15% above set point?
3%: turn on heaters
9%: high level alarm
15%: turn off normal running charging pump
What happens if pressurizer level is 3.5%, and 23% below set point?
3.5%: low level alarm
23%: turn on standby charging pump
What happens if pressurizer level equals 25%?
All heaters turn off
