注目の話題: こんな考え最低ですか？婚約中; 友達ってなんだろう; 婚活で出会った人を信用する方法

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No.151　13/10/23 08:17
燻し銀三 ( 50代 ♂ Oe38xe ) あ+あ-

【A control rod which controls a number of the neutrons.】

《Materials of absorbing the neutrons.》

For example,the material of absorbing the neutrons in which stainless steel added to boron ホウ素 has such a strength and durability that it never leaks the neutrons.🙋

Therefore,we use it for a rack storing up used rod of nuclear fuel or for transportation of the toxic waste.😃

【Moderator 減速材 which decreases the speed of neutrons.】

Collision of neutrons causes an atomic fission proceeding in an atomic reactor,but possibility of the collision is influenced with the speed of the neutrons.😃

Speedy neutrons have low possibility for its reaction,so we need to decrease the neutrons' speed so as to expand the possibility for its reaction.We use a material for it.We call the material a moderator.☝

《The moderator and the number of times of the collision.》

The neutron has neither electric charge nor magnetism,so we have to make it bump against other thing in order to decrease its speed.🔥