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slightly-enriched uranium
noun
(nuclear
physics)
Enriched
uranium
with
0.9-2%
uranium-235,
requiring
a
special
moderator
with
very
low
neutron
absorption
(such
as
heavy
water
or
high-purity
graphite)
in
order
to
be
able
to
sustain
a
nuclear
fission
chain
reaction.
Used
to
increase
power
output
and
efficiency
in
a
few
types
of
nuclear
reactors
capable
of
running
on
natural
uranium,
and
for
downblending
of
highly-enriched
uranium
from
decommissioned
nuclear
weapons
into
low-enriched
uranium
suitable
for
use
in
commercial
power
reactors.
low-enriched uranium
noun
(nuclear
physics)
Enriched
uranium
with
at
least
2%
but
less
than
20%
uranium-235,
enough
to
sustain
a
nuclear
fission
chain
reaction
in
a
nuclear
reactor
moderated
by
light
water
but
not
enough
to
allow
a
self-sustaining
fission
chain
reaction
without
a
moderator;
used
as
the
main
nuclear
fuel
in
most
commercial
nuclear
reactors
used
to
generate
electricity.