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Created page with "==Key Stage 4== ===Meaning=== A moderator is a substance used in nuclear fission reactors to slow fast moving neutrons to become Ther..."
==Key Stage 4==
===Meaning===
A [[moderator]] is a [[substance]] used in [[Nuclear Fission Reactor|nuclear fission reactors]] to slow fast moving [[neutron]]s to become [[Thermal Neutron|thermal neutron]]s.
===About Moderators===
: [[Moderator]]s [[Absorb (Physics)|absorb]] some of the [[energy]] of fast moving [[neutron]]s which slows them down to a [[speed]] where they are called [[Thermal Neutron|thermal neutron]]s which are able to be captured by [[Nuclear Fission|fissionable]] [[isotope]]s.
: Without a [[moderator]] in a [[Nuclear Reactor|nuclear reactor]] the [[neutron]]s released from each [[Nuclear Fission|fission]] event would be moving too fast to cause a second [[Nuclear Fission|fission]] event so a [[Nuclear Chain Reaction|chain reaction]] would not be possible.
===Meaning===
A [[moderator]] is a [[substance]] used in [[Nuclear Fission Reactor|nuclear fission reactors]] to slow fast moving [[neutron]]s to become [[Thermal Neutron|thermal neutron]]s.
===About Moderators===
: [[Moderator]]s [[Absorb (Physics)|absorb]] some of the [[energy]] of fast moving [[neutron]]s which slows them down to a [[speed]] where they are called [[Thermal Neutron|thermal neutron]]s which are able to be captured by [[Nuclear Fission|fissionable]] [[isotope]]s.
: Without a [[moderator]] in a [[Nuclear Reactor|nuclear reactor]] the [[neutron]]s released from each [[Nuclear Fission|fission]] event would be moving too fast to cause a second [[Nuclear Fission|fission]] event so a [[Nuclear Chain Reaction|chain reaction]] would not be possible.