Assertion: heavy water | /r/CapableOf | act as a neutron moderator
Facets:
value: to slow down neutrons
type: PURPOSE
Source sentences:
text: Heavy water is used in certain types of nuclear reactors, where it acts as a neutron moderator to slow down neutrons so that they are more likely to react with the fissile uranium-235 than with uranium-238, which captures neutrons without fissioning.
text: Heavy water acts as a neutron moderator.