Heavy Water Reactor
A pressurised heavy water reactor (PHWR) is a nuclear power reactor, commonly using unenriched natural uranium as its fuel, that uses heavy water (deuterium oxide D2O) as its coolant and moderator. The heavy water coolant is kept under pressure, allowing it to be heated to higher temperatures without boiling, much as in a PWR. While heavy water is significantly more expensive than ordinary light water, it yields greatly enhanced neutron economy, allowing the reactor to operate without fuel enrichment facilities (mitigating the additional capital cost of the heavy water) and generally enhancing the ability of the reactor to efficiently make use of alternate fuel cycles.
Read more about Heavy Water Reactor: Purpose of Using Heavy Water
Famous quotes containing the words heavy and/or water:
“The heavy sensual shoulders, the thighs, the blood-born flesh
and earth turning into color, rocks into their crystals,
water to sound, fire to form: life flickers
uncounted into the supple arms of love.”
—Muriel Rukeyser (1913–1980)
“Our star was brighter perhaps when it had water in it.
Now there is no question even of that, but only
Of holding on to the hard earth so as not to get thrown off,
With an occasional dream, a vision ...”
—John Ashbery (b. 1927)