METHOD OF MONITORING NEUTRON FLUX IN HIGH-FLUX NUCLEAR PLANTS Russian patent published in 2025 - IPC G01T3/00 

FIELD: nuclear engineering.

SUBSTANCE: invention can be used for monitoring high-intensity neutron fluxes in nuclear reactors and thermonuclear fusion plants. Method of monitoring neutron flux involves irradiating a microampule with an active substance with calcium oxalate CaC₂O₄ (oxalic acid salt H₂C₂O₄⋅2H₂O and an alkali-earth metal calcium Ca), placed in a neutron stream, formation of gaseous radioactive inert gas of argon ³⁷Ar due to nuclear reactions of neutrons with nuclei of active substance CaC₂O₄, extraction of inert gas ³⁷Ar from active substance due to diffusion and transfer of formed radioactive inert gas ³⁷Ar into flow counter by helium He transport gas, wherein the transport gas helium He, purified from radioactive isotopes of argon and the quenching additive CH₄, is pumped back into the neutron monitor system for reuse at rate of 50 cm³/s, which is sufficient for cooling the micro ampoule to a temperature not higher than the decomposition temperature of calcium oxalate 250 °C.

EFFECT: broader capabilities of monitoring neutron fluxes in high-flux nuclear plants.

1 cl, 2 dwg