At A2 level you should be able to:

• label a diagram of a nuclear reactor
• know that U₂₃₅ is the isotope that undergoes fission
• remember the nuclear equations for fission
• explain what a chain reaction is
• explain the purpose of a moderator
• explain the purpose of control rods
• name the material used for a moderator
• name the material used for control rods
• know why thick concrete shielding is needed
• understand the heat exchange mechanism
• know what critical mass is