The case for gas cooling

Abstract The objective of this paper is to discuss the technological motivations for gas cooling of nuclear power reactors, as there are: (1) pure single-phase operation; (2) low neutron absorption and moderation; (3) chemical and radioactive inertness in the case of helium; (4) transparency; (5) total coolant loss impossible — only depressurization; and (6) low total stored energy. The present discussion is primarily in the context of the needs of the fast breeder reactor. More generally, it is pointed out that gas cooling allows full utilization of the most modern steam plant development, with substantial advantages both to plant cost and efficiency. It also makes feasible the intergral PCRV type of construction. The prospect of future combination with the gas turbine offers a unique field for future reduction of plant cost.