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減速材 (gensokuzai) Japanese meaning: moderator | Kotomora

減げん速そく材ざい

げ

ん

そ

く

ざ

い

Meanings

1

moderator; neutron moderator

Technical term in nuclear physics for a material that slows down fast neutrons.

原げん子し炉ろでは減げん速そく材

ざい

と

し

て

水みず

や

黒こく

鉛えん

が

使つか

わ

れる

。

In nuclear reactors, water or graphite is used as a moderator.

Kanji

減dwindle, decrease, reduce
速quick, fast
材lumber, log, timber

Built from

減げん速そく+材ざい

Etymology

Compound of 減速 (gensoku, 'deceleration') and 材 (zai, 'material').