METHOD AND DEVICE FOR MEASURING NEUTRON FLUX DENSITY INCLUDING THAT IN NUCLEAR POWER PLANT Russian patent published in 2001 - IPC

FIELD: nuclear power engineering; measuring neutron flux density in neutron-radiating source. SUBSTANCE: for shaping broad-band signal W depending on neutron flux density n use is made of different first and second measuring signals S₁ and S₂, respectively. S₁ and S₂ are monotonous functions of neutron flux density n. Within the range of low neutron flux densities n < n₁ broad-band signal W equals first measuring signal S₁. At low values of neutron flux density n > n₂ signal W equals second measuring signal S₂. In span (Δ) ranging between n₁ and n₂ signal W is equated to monotonous function of both measuring signals S₁, S₂. Measuring signal of ionization chamber, fission chamber, boron chamber, SPN detector, or charged-particle counter is used as measuring signal S₁, S₂. Device for measuring neutron flux density incorporates evaluation meter. Proposed method and device provide for measuring neutron flux density within wide range from shutdown condition of nuclear power plant to its normal operation. EFFECT: facilitated procedure, enhanced reliability, enlarged functional capabilities. 11 cl, 2 dwg