NUCLEAR POWER REACTOR Russian patent published in 2001 - IPC

FIELD: nuclear reactors using finely dispersed solid coolant. SUBSTANCE: reactor has vessel accommodating core with coolant passages between fuel elements (assemblies), coolant bin mounted above the core, secondary-circuit heat exchanger, and device for conveying coolant over following closed loop: bin - core - secondary-circuit heat exchanger - bin; it also has valves for controlling speed of coolant flow through core. In addition, reactor is provided with too small coolant particles separator mounted downstream of secondary-circuit heat exchanger. Used as coolant is finely dispersed graphite-containing solid material in the form of fill of spherical particles their degree of roundness Δ, being not over 0.1; this parameters is calculated by equation where d_max is maximal diameter of particle; d_min is minimal diameter of particle; is mean diameter of particle. Difference in mean diameters of particles is not over 20%; mean diameter of particles used is chosen between 0.5 and 2.5 mm. Spherical particles of coolant are covered with packing coating of pyrolytic carbon, whose thickness is 0.1-0.2 of mean diameter of particles. In addition, reactor is provided with coolant agitator mounted in core fuel elements (assemblies) and/or in coolant passages between the latter. EFFECT: augmented heat transfer from core; improved nuclear safety. 5 cl, 5 dwg