Neutron moderator | Wikipedia audio article
Channel: wikipedia tts
Date: 2018-12-08

This is an audio version of the Wikipedia Article:
Neutron moderator


00:00:34 1 Moderation
00:05:51 1.1 Choice of moderator materials
00:08:06 1.2 Distribution of neutron velocities once moderated
00:08:56 2 Reactor moderators
00:11:39 3 Form and location
00:13:27 4 Moderator impurities
00:14:23 5 Non-graphite moderators
00:16:00 6 Nuclear weapon design
00:19:53 7 Materials used
00:22:20 8 See also



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SUMMARY
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In nuclear engineering, a neutron moderator is a medium that reduces the speed of fast neutrons, thereby turning them into thermal neutrons capable of sustaining a nuclear chain reaction involving uranium-235 or a similar fissile nuclide.
Commonly used moderators include regular (light) water (roughly 75% of the world's reactors), solid graphite (20% of reactors) and heavy water (5% of reactors).Beryllium has also been used in some experimental types, and hydrocarbons have been suggested as another possibility.