METHOD OF NATURAL CIRCULATION OF A LIQUID METAL COOLANT OF A FAST NEUTRON REACTOR Russian patent published in 2019 - IPC G21C15/00 

FIELD: physics.

SUBSTANCE: invention relates to nuclear technology and can be used in natural circulation of a liquid metal coolant in a circuit of a fast neutron reactor. To generate dynamic pressure for the circulation of a liquid metal coolant in a circuit of a fast neutron nuclear reactor without heat transfer from the reactor before filling pipelines and equipment of lifting and lowering sections of the circuit, they are electrically heated to temperatures T₁ and T₂, selected according to the inequation: ρ₁(T₁)⋅g⋅ΔH₁>ρ₂(T₂)⋅g⋅ΔH₂+ΔP, wherein ρ₁(T₁) - density of a liquid metal coolant at temperature T₁ of pipelines at the lifting section; ρ₂(T₂) - density of a liquid metal coolant at temperature T₂ of pipelines on the lowering section; ΔH₁ - difference in height between the input and output of the lifting section; ΔH₂ - difference in height between the input and output of the lowering section; ΔR - hydraulic resistance of the circuit; g - gravity acceleration.

EFFECT: ensuring the start of natural circulation by generating dynamic pressure of circulation and ensuring the required direction of natural circulation of a liquid metal coolant in the heat sink circuit without transferring heat from the nuclear reactor.

1 cl, 2 dwg