A method of organizing the natural circulation of a liquid metal coolant of a fast neutron nuclear reactor

摘要

The invention relates to the field of nuclear engineering and can be used to organize the natural circulation of liquid metal coolant in the heat sink of a fast neutron nuclear reactor.In order to create a driving pressure of circulation without using pumping equipment and to provide the required direction of natural circulation of the liquid metal coolant in the heat sink circuit of the fast neutron nuclear reactor in the absence of heat transfer from the reactor before filling the pipelines and equipment of the lifting and downing sections of the circuit, they are pre-heated by electric heating to temperatures Tsub1/suband Tsub2/sub, respectively, which are selected from the condition of inequality: ρsub1/sub(Tsub1/sub)·g·ΔHsub1/sub ρsub2/sub(Tsub2/sub)·g·ΔHsub2/sub+ΔP, where: ρsub1/sub(Tsub1/sub) is the density of the liquid metal coolant at temperature Tsub1/subof pipelines and equipment in the lifting section;ρsub2/sub(Tsub2/sub) is the density of the liquid metal coolant at temperature Tsub2/subof pipelines and equipment at the downing section;supΔ/supHsub1/subis the height difference between the inlet and outlet of the lifting section;supΔ/supHsub2/subis the height difference between the inlet and outlet of the downing section;supΔ/supP is the hydraulic resistance of the circuit; g is the acceleration of gravity.The circulation of the coolant in the circuit and the transition to natural circulation mode are carried out simultaneously until the nuclear reactor reaches its rated operating parameters by creating a moving pressure of the circulation due to the difference in densities ρsub1/sub(Tsub1/sub) and ρsub2/sub(Tsub2/sub) of the liquid metal coolant on the lifting and downing sections of the circuit, respectively.