Power Plant Engineering
Where reactor operation is designed with fast neutrons such as in reactors using highly enriched fuel, the moderator used is

Carbon dioxide
Graphite
Heavy water
No moderator is needed

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Power Plant Engineering
Pick up the wrong statement

Slow or thermal neutrons have energy of the order or 0.025 eV
Fast neutrons have energies above 1000 eV
Fast reactor uses moderator
In a heterogeneous or solid fuel reactor, the fuel is mixed in a regular pattern within moderator

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