GK
NUCLEAR SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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fuel
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lubricant
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insulation lining of the reactor.
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retarder of neutron velocity.
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Detailed explanation-1: -The graphite bricks act as a moderator. They reduce the speed of neutrons and allow a nuclear reaction to be sustained.
Detailed explanation-2: -Graphite is used as moderator because they reflect the fast moving neutrons. They also convert fast neutrons into thermal neutrons for producing and sustaining a nuclear chain reaction.
Detailed explanation-3: -Graphite is an important material for the construction of both historical and modern nuclear reactors, due to its extreme purity and ability to withstand extremely high temperature.
Detailed explanation-4: -There are two very basic nuclear requirements for moderator graphite, or, for that matter, any moderator material. First, it must be effective in slowing fast neutrons down to thermal energies, and, second, it must have a small cross section for neutron absorption.