TERMIUM Plus®

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UNDERMODERATION [1 record]

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Filter results by subject field

Alphabetical list of terms

Record 1 2011-12-22

English

Subject field(s)
  • Nuclear Fission Reactors
CONT

Moderation is a very important balance in a reactor. If a reactor has the perfect amount of moderation, it has the highest power efficiency. Too much moderator in respect to fuel creates a situation called overmoderation. The opposite condition is undermoderation. Overmoderation can be dangerous, because this means when a moderator becomes less efficient, which tends to happen when it gets warmer, the reactor actually increases in power.

CONT

Undermoderation is a key criterion for reactor stability and it must also be applied to fast reactors (where the molten metal has some slowing-down effect.

Key term(s)
  • under-moderation

French

Domaine(s)
  • Réacteurs nucléaires de fission

Spanish

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