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Use of ordinary (light) water as a reactor moderator with enriched uranium fuel: evaluate the statement. Statement: “Ordinary water is sometimes used as a moderator when enriched uranium is used as fuel in nuclear power plants.” Choose whether the statement is correct.

Difficulty: Easy

Agree
Disagree
Only with natural uranium
Only with heavy water

Correct Answer: Agree

Explanation:

Concept/Approach
Light-water reactors (PWR/BWR) use ordinary water as moderator and coolant but require enriched uranium fuel (typically 3–5% U-235) to maintain criticality. Natural uranium needs better moderators like heavy water or graphite.

Final Answer
Agree.

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