nbsp   What other kinds of coolant have been tested with CANDU?
[A. CANDU Technology] [B. The Industry] [C. Cost/Benefit] [D. Safety/Liability] [E. Waste] [F. Security/Non-Proliferation] [G. Uranium] [H. Research Reactors] [I. Other R&D] [J. Further Info] The CANDU design is based on heavy water neutron moderation, but this does not constrain the choice of coolants that can be used. In the early days of CANDU development several different coolants were considered, including pressurized heavy water, boiling light water, steam, fog (i.e. steam with entrained water droplets), organic liquid, carbon dioxide, and helium. Each of these promised (at least on paper) various advantages, and each presented unique challenges. In many ways the use of pressurized heavy water coolant was the simplest approach for Canadian design engineers in the 1950s and 1960s, given the state of knowledge of reactor coolants at that time. A development program of prototype heavy-water power reactors was thus well underway in Canada by the mid-60’s, with the 25 MWe NPD coming o
[A. CANDU Technology] [B. The Industry] [C. Cost/Benefit] [D. Safety/Liability] [E. Waste] [F. Security/Non-Proliferation] [G. Uranium] [H. Research Reactors] [I. Other R&D] [J. Further Info] The CANDU design is based on heavy water neutron moderation, but this does not constrain the choice of coolants that can be used. In the early days of CANDU development several different coolants were considered, including pressurized heavy water, boiling light water, steam, fog (i.e. steam with entrained water droplets), organic liquid, carbon dioxide, and helium. Each of these promised (at least on paper) various advantages, and each presented unique challenges. In many ways the use of pressurized heavy water coolant was the simplest approach for Canadian design engineers in the 1950s and 1960s, given the state of knowledge of reactor coolants at that time. A development program of prototype heavy-water power reactors was thus well underway in Canada by the mid-60’s, with the 25 MWe NPD coming o
