Assertion: heavy water | /r/HasProperty | expensive
Facets:
value: very
type: DEGREE
Source sentences:
text: While heavy water is very expensive to isolate from ordinary water (often referred to as light water in contrast to heavy water), its low absorption of neutrons greatly increases the neutron economy of the reactor, avoiding the need for enriched fuel.
text: So you can make a choice: use heavy water which is expensive to produce, or use light water and expensive enriched uranium.
text: Light water has less desirable moderation properties than heavy water, but the fact that it is essentially free, while heavy water is expensive, gives it an advantage.