Total Absorption Method in Measurements of 14 MeV Neutron Multiplication Factors

摘要

The paper deals with methodological questions arising in connection with the measurement of neutron leakage from spherical assemblies simulating multiplication zones of controlled thermonuclear reactor blankets. A boron tank, which has a number of advantages over other detectors of total absorption, served as the neutron detector. On the basis of the calculations performed, it was shown that surrounding the assembly under study with a layer of borated water serving as a neutron detector does not affect the processes of 14 MeV neutron multiplication. The boron tank has a constant recording efficiency for neutrons in the 0-6 MeV energy range. A procedure is proposed for measuring the leakage of neutrons from spherical samples with a central 14 MeV source. Translated from Russian. 8 references, 3 figures, 3 tables. (ERA citation 12:042780)