noun
thermal-neutron reactor
Technical term in nuclear engineering; a reactor that uses moderated (thermal) neutrons to sustain fission.
熱中性子炉は、減速材を使って中性子の速度を落とす。
A thermal-neutron reactor uses a moderator to slow down neutrons.
A fast-neutron reactor, which uses high-energy neutrons without a moderator, in contrast to a thermal-neutron reactor.
Compound of 熱 (thermal), 中性子 (neutron), and 炉 (reactor). A straightforward technical term.