Which of the following is not a good moderating material ?
Correct answer: D. All A., B. and C.
- A. Concrete
- B. Boron
- C. 18/8 stainless steel
- D. All A., B. and C.
Explanation
A good moderator should slow neutrons efficiently while absorbing very few of them. Boron absorbs neutrons strongly, and stainless steel is not an effective moderator; concrete is used mainly because its water and hydrogen content provides moderation, so all three listed materials are unsuitable as ideal moderators in this context.
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