Chemical and Volume Control System Flashcards
What cools the Regenerative Heat Exchanger?
Charging
Why are there two Heat Exchangers in the CVCS System?
To protect the resin in the ion exchangers
What is the purpose of the Back Pressure Control Valves?
To maintain a subcooled condition before the Letdown Heat Exchanger
What happens if the level in the Volume Control Tank get too high?
Valve (CH-500) changes the flow path away from the VCT towards the Pre-holdup Ion Exchanger ultimately to the CVCS Hut
What gas is present in the Volume Control Tank?
Tank is pressurized with Hydrogen
How many charging pumps are in the CVCS system?
Three pump
Normally Running
Always Running
Standby
What pumps provide Auxiliary Spray to the Pressurizer?
Charging Pumps
What alternative paths are in the CVCS system?
Seal Injection to the RCPs
Aux Spray to the Pressurizer
CVCS Hut
How many gallons are provided to the seal injection system of the Reactor Coolant Pumps?
6.6 gallons per Reactor Coolant Pump
Where is letdown taken from the reactor coolant system?
2B Cold Leg
Before RCP
Where is charging placed back in the Reactor Coolant System?
2A Cold Leg
After RCP
What is the purpose of the charging line back pressure control valves?
Keep flow ability to the Aux Spray Lines
How is boron added to the reactor coolant system?
Refueling Water Tank inventory is pumped into the VCT via the Boric Acid Mix Pumps
What is the Boric Acid Concentrator?
Separates the Boron/water mixture
Places reusable boron into the Refueling Water Tank
Water essentially evaporates
What type of ion exchangers are in the CVCS?
Ionic Purification
Deborating Ion Exchanger
Delithiating Ion Exchanger
