Pressurizer Pressure & Level Control System

Question 1

State the function of the Pressurizer Pressure & Level Control System.

Answer 1

Maintains RCS pressure control & inventory control during:
Steady state operation
Load transients
RCS heatup & cooldown

Question 2

State the purpose of the Pressurizer

Answer 2

Provides a location to create a steam bubble for RCS pressure control & acts as a surge volume for the RCS.

Question 3

State the purpose of the Pressurizer Heaters

Answer 3

Provides the heat required to establish and maintain a steam bubble in the PZR & maintains the PZR at a saturated condition.

Question 4

State the purpose of the Pressurizer Spray Valves (Main and Auxiliary)

Answer 4

Provides RCS pressure control when Reactor Coolant Pumps are operating.

Question 5

State the reasons for using a programmed level setpoint during Power Operations.

Answer 5

Maintaining PZR water level at a temperature dependent programmed level allows for expansion and contraction of the RCS due to normal temperature changes in the power range.