Which of the following is a non-fissile material ?
Correct answer: D. Thorium-232
- A. Plutonium-239
- B. Uranium-235
- C. Uranium-233
- D. Thorium-232
Explanation
Thorium-232 is non-fissile with thermal neutrons and is fertile because it can breed U-233 after neutron capture and decay. Pu-239, U-235, and U-233 are fissile materials.
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