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Question
Which one of the following is used as 'moderator' in nuclear reactors?
Which one of the following is used as 'moderator' in nuclear reactors?
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Solution
The correct option is D Beryllium oxide
The
moderator is used to moderate, that is, to slow down neutrons from fission to
thermal energies. The probability that fission will occur depends on incident
neutron energy. Moderator is of great importance in nuclear reactors. Nuclei
with low mass numbers are most effective for this purpose, so the moderator is
always a low-mass-number material. Beryllium oxide is used as moderator in nuclear
reactors.
The moderator is used to moderate, that is, to slow down neutrons from fission to thermal energies. The probability that fission will occur depends on incident neutron energy. Moderator is of great importance in nuclear reactors. Nuclei with low mass numbers are most effective for this purpose, so the moderator is always a low-mass-number material. Beryllium oxide is used as moderator in nuclear reactors.
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