Last Updated：2025/12/06
(nuclear physics, military) Enriched uranium containing at least 20% uranium-235 (some applications, such as fission weapons and naval reactors, use uranium enriched to as high as 80-95% uranium-235), and therefore capable of sustaining a nuclear fission chain reaction without needing a moderator; used in nuclear weapons and in a few types of nuclear reactors requiring very high power density or high neutron flux.
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highly-enriched uranium
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Source Word
highly-enriched uranium
Noun
uncountable
(nuclear
physics,
military)
Enriched
uranium
containing
at
least
20%
uranium-235
(some
applications,
such
as
fission
weapons
and
naval
reactors,
use
uranium
enriched
to
as
high
as
80-95%
uranium-235),
and
therefore
capable
of
sustaining
a
nuclear
fission
chain
reaction
without
needing
a
moderator;
used
in
nuclear
weapons
and
in
a
few
types
of
nuclear
reactors
requiring
very
high
power
density
or
high
neutron
flux.
Japanese Meaning
（核物理学、軍事用語）ウラン235を20%以上含有する濃縮ウラン。核分裂連鎖反応を自立的に維持できるため、核兵器や高出力または高中性子フラックスを要求する特殊な原子炉に用いられる。
Sense（1）
(nuclear
physics,
military)
Enriched
uranium
containing
at
least
20%
uranium-235
(some
applications,
such
as
fission
weapons
and
naval
reactors,
use
uranium
enriched
to
as
high
as
80-95%
uranium-235),
and
therefore
capable
of
sustaining
a
nuclear
fission
chain
reaction
without
needing
a
moderator;
used
in
nuclear
weapons
and
in
a
few
types
of
nuclear
reactors
requiring
very
high
power
density
or
high
neutron
flux.
