Physics · Nuclear Energy
Consider the following statements regarding Light Water Reactors (LWRs) and Pressurized Heavy Water Reactors (PHWRs): Statement I: LWRs require enriched uranium, whereas PHWRs can sustain a chain reaction using natural uranium due to the superior neutron economy provided by heavy water. Statement II: PHWRs do not operate with inherently higher thermal efficiency than LWRs, because their lower outlet temperatures limit the achievable cycle efficiency. Statement III: Heavy water has lower neutron absorption compared to light water, which directly contributes to PHWRs being able to use natural uranium as fuel. Which one of the following is correct in respect of the above statements?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Both Statement II and Statement III are correct, and both of them explain Statement I.
- 2Both Statement II and Statement III are correct, but only one of them explains Statement I.✓
- 3Only one of the Statements II and III is correct, and that explains Statement I.
- 4Neither Statement II nor Statement III is correc t.
Correct answer
Both Statement II and Statement III are correct, but only one of them explains Statement I.
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