RADIOACTIVITY.EU.COM

icon THE PHENOMENON

THE PHENOMENON

icon IN DAILY LIFE

IN DAILY LIFE

icon QUESTION OF DOSES

QUESTION OF DOSES

icon AT THE DOCTOR’S

AT THE DOCTOR’S

icon At the laboratory

At the laboratory

icon At the museum

At the museum

icon NUCLEAR ENERGY

NUCLEAR ENERGY

icon RADIOACTIVE WASTE

RADIOACTIVE WASTE

The aim of this web site is to explain radioactivity and its applications to the general public.

A neutron moderator is a medium which reduces the velocity of fast neutrons and in which the fuel of a conventional nuclear reactor is immersed. Without moderator, such a reactor can not operate. The role of moderator is to slow down neutrons to promote fission chain reaction. The most commonly uses moderators are ordinary or heavy water (boiling or under pressure) and graphite. In the case of ordinary or heavy water, the medium is also used for cooling in order to remove the heat produced in the heart of the reactor.

Similar definition(s) :

Neutrons cooling

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