Nuclear Lifecycle 5

Match the type of reactor to its moderator and coolant.

• CO2 coolant, graphite moderator

• PHWR/CANDU

• Water coolant, graphite moderator

• PWR

• Water for both

• FNR

• Liquid metal coolant, no moderator

• RBMK

• Heavy water for both

• AGR

Match the reactor to its fuel type...

• U-235 enriched to 2-3%

• PWR

• Natural unenriched U

• RBMK/AGR

• Pu or spent nuclear fuel

• HTR

• U-235 enriched to <20%

• FNR

• U-235 enriched to 4-5%

• PHWR/CANDU

Which statement is NOT true about SMRs

• They have enhanced safety features

• They will use HALEU fuel

• They can be decommissioned in situ

• They are more expensive to build

Which of the following is NOT true about molten salt coolants?

• They can be used as primary coolants

• They have high melting points so need to be mixed with Mg/CaCl2

• F is less soluble than Cl

• Cl produces radioactive irradiation products

What is used to bring reactors up to temperature before they are made critical?

• Electrical heaters

• Fission processes

• Reactor coolant pumps

• Pressuriser

Which part of the nuclear power plant controls temperature?

• Turbine generator
• Fission processes

• Reactor coolant pumps

• Pressuriser

Which parts of the nuclear power plant are used to decrease temperature and pressure?

• Containment spray system

• Fan cooler system

• Turbine generator

• Condenser

Where is the heat transferred from the primary coolant to the secondary coolant?

• Steam generators

• Turbines

• Reactor coolant pumps

• Condenser