Fast Reactors Vs. Thermal Reactors
Fast neutron reactors use fast fission to produce energy, unlike most nuclear reactors. In a conventional reactor, a moderator is needed to slow down the neutrons so that they are more likely to fission atoms. A fast neutron reactor uses fast neutrons, so it does not use a moderator. Moderators may absorb a lot of neutrons in a thermal reactor, and fast fission produces a higher average number of neutrons per fission, so fast reactors have better neutron economy making a plutonium breeder reactor possible. However, a fast neutron reactor must use relatively highly enriched uranium or plutonium so that the neutrons have a better chance of fissioning atoms.
Read more about this topic: Fast Fission
Famous quotes containing the word fast:
“There was a literary gentleman present who who had dramatised in his time two hundred and forty-seven novels as fast as they had come out—and who was a literary gentleman in consequence.”
—Charles Dickens (1812–1870)