A METHOD OF ASSESSING FUEL ISOTOPE COMPOSITION IN NUCLEAR REACTOR CORE

摘要

The invention relates to nuclear power engineering and can be used to determine the isotopic composition of the fuel in the cores of the nuclear reactor. The aim of the invention is to increase safety and efficiency, as well as to ensure the possibility of remote determination of the isotopic composition of the fuel during the operation of the reactor. The method consists in measuring the spectral energy characteristics of nuclear fission products and determining the burnout of 235U and accumulation of 239Pi. The energy spectrum of positrons from the antineutrino reverse / decay reaction on protons of a hydrogen-containing target in the energy range 1.2–7.2 MeV is measured, the positron energy spectra from the antineutrino reverse / decay reaction on protons from isotope fission of 23 U, 239 2323 are determined 241 Hz and the fractions of 235U, 239Pu divisions are calculated from them. 238U, 241Pi. 3 il., Table.