In a thorium-cycle nuclear reactor, the fission of a uranium-233 (092233U^{233}_{\phantom{0}92}\text{U}092233U) nucleus releases several high-energy neutrons.
Explain how these released neutrons are able to initiate and maintain a self-sustaining nuclear chain reaction.
94 exam-style questions on Edexcel GCSE Physics 6.5 Uses and dangers of radioactivity. Each one has a worked solution and a mark scheme showing where the marks go.