A CANDU 9 Reactor is operating at 100% full power, in Normal Mode of Overall Unit control and Normal Mode of PHT pressure control
engineering
Description
Nuclear Plant Operations
(NUCL 4640U)
(Total 30 Marks)
Simulator Assignment 3 – 2019
Question 1 (17 marks)
A CANDU 9 Reactor is operating at 100%
full power, in Normal Mode of Overall Unit control and Normal Mode of PHT
pressure control, and one of the PHT Liquid Relief Valves fails open. Simulate
this event on the CANDU 9 Simulator.
Hint: Start the CANDU 9 simulator at
100% full power. Insert Malfunction “ PHT LRV (CV20) Fails Open and observe the
response.
NOTE: You will need to operate the
simulation for about 30 minutes.
1a. How does the PHT pressure and inventory control system respond to the problem in the first couple of minutes?
1b. What happens when the Bleed Condenser is completely
filled with D2O?
1c.
Where is the D2O that is being lost from the system going? Is this event a Loss of Coolant accident?
1e. Eventually there is a sudden change in
reactor power. What causes the change to reactor power?
