Edexcel GCSE Physics · 1PH0
Specification 6.40P · Paper 1
Revise: Control in ReactorsThe moderator and control rods affect neutrons in different ways so that operators can regulate the reaction.
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GCSE Physics · key term
A movable component in a nuclear reactor that absorbs neutrons, allowing the rate of the chain reaction to be regulated.
Used by Edexcel
Specification 6.40P · Paper 1
Revise: Control in ReactorsThe moderator and control rods affect neutrons in different ways so that operators can regulate the reaction.
State the different actions precisely: the moderator slows neutrons, whereas control rods absorb neutrons.
Do not say that control rods absorb all neutrons during normal operation. Enough neutrons must remain to sustain a steady chain reaction.
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