Power Plant Engineering
Moderator in nuclear plants is used to

Control the reaction
Cause collision with the fast moving neutrons to reduce their speed
Reduce temperature
Extract heat from nuclear reaction

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Power Plant Engineering
Natural uranium is made up of

99.282% U₂₃₈, 0.712% U₂₃₅, 0.006% U₂₃₄
99.282% U₂₃₄, 0.712% U₂₃₈, 0.006% U₂₃₅
99.282% U₂₃₅, 0.712% U₂₃₈, 0.06%' U₂₃₄
99.282% U₂₃₅, 0.712% U₂₃₄, 0.006% U₂₃₈

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