Nuclear Engineering Principles 7

Match the reactor to its moderator and coolant...

• Graphite moderator, water coolant

• PHWR/CANDU

• Graphite moderator, CO2 coolant

• PWR

• Heavy water moderator and coolant

• AGR Graphite

• No moderator, liquid metal coolant

• RBMK

• Water moderator and coolant

• FNR

Match the reactor to its fuel type...

• Enriched U-235 to <20%

• HTR

• Low enriched UO2 (2-3%)

• PWR

• Natural unenriched U

• RBMK/AGR

• Pu or mixed fuels

• PHWR/CANDU

• Enriched UO2 (4-5%)

• FBR

What is the purpose of a moderator?

• To slow down fast neutrons

• To speed up thermal neutrons

• To act as a safety mechanism

• To absorb neutrons

What is the purpose of the containment building (select all that apply)?

• To prevent radioactivity release in an accident

• To protect the reactor from terrorist attacks

• To protect the reactor from natural disasters

• To provide shielding to site workers

Which of these is not a good material for control rods?

• Boron

• Cadmium

• Hafnium

• Steel

How many coolant circuits does a PWR have?

• 1

• 2

• 3

• 4

Which of these is NOT true about Small Modular Reactors (SMRs)?

• They have enhanced safety features

• They are more expensive to build

• They can be decommissioned in situ

• They will use HALEU fuel

Which type of reactors will help to close the fuel cycle (burn up spent fuel)?

• FNRs

• PWRs

• AGRs

• HTRs

Which generation(s) of reactor are currently in operation?

• I

• II

• III

• IV

Which statements are true about Fast Neutron Reactors (FNRs)?

• They cannot be restarted when shut down if using liquid metal coolants

• They can use molten salts as coolants

• They are expensive to build

• They can use a range of fuels