Uranium metal enriched with Uranium - 235 is used
in heavy water reactors while light water reactors use low enriched Uranium.
The Government of Canada could build on this momentum to develop an expanded MoU on civilian nuclear technology co-operation that includes research in
pressurized heavy water reactor technology, nuclear medicine and other areas discussed by the prime ministers.
India's environment minister Jairam Ramesh has said that the country should expand its nuclear energy program mainly by using its indigenous
Pressurised Heavy Water Reactors, of which the country now has 18 installed.
The deal required Iran to disable most of the centrifuges it used to enrich uranium, to ship out most of its uranium stockpile, to ensure
a heavy water reactor could not produce weapons - grade plutonium, and to submit to monitoring and verification by international inspectors.
Achieving that longer lead time requires blocking Iran's four routes to nuclear weapons: through its Natanz and Fordow uranium enrichment facilities, where thousands of centrifuges separate uranium isotopes; through plutonium production at the Arak
heavy water reactor, which Iran says is needed to produce medical radioisotopes; and by way of a covert path involving undisclosed facilities.
James B. Conant urges proceeding with * all * options for producing fissionable material simultaneously: gaseous diffusion, centrifuge, Electromagnetic Separation, and plutonium breeding using both graphite and
heavy water reactors.