Some Features of the Operation of Pelletized Cryogenic Mesitylene-Based Moderators at the IBR-2 Pulsed Fast Reactor
Bulavin M.V. Mukhin K.A. Yskakov A. Rogov A.D. Galushko A.V. Skuratov V.A. Smelyansky I.A.
February 2022Pleiades journals
Journal of Surface Investigation
2022#16Issue 1
Abstract—: The radiochemical and neutron-physical characteristics of a pelletized cryogenic moderator based on a mesitylene mixture (a mixture in the form of frozen pellets) obtained during its operation at the pulsed fast reactor IBR-2 are presented. It is shown that changes in the properties of the mixture at high absorbed-irradiation doses (~100 MGy) have no significant effect on the spectrum of cold neutrons. The gain in the number of cold neutrons from the surface of a cold moderator in comparison with a water moderator reaches 10 times. There is no deterioration in the neutron flux at the end of the reactor duty cycle. If the technology of continuous modification of the working substance in the cryogenic moderator chamber is successfully developed, the frozen mixture of mesitylene and m-xylene can be recommended for use on powerful pulsed neutron sources.
absorbed dose , aromatic hydrocarbons , cryogenic moderator , m-xylene , mesitylene , neutron spectrum , pulsed neutron source , radiolytic hydrogen , viscosity
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Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980, Russian Federation
Petersburg Nuclear Physics Institute, National Research Center “Kurchatov institute,”, Gatchina, Leningrad oblast, 188300, Russian Federation
Institute of Nuclear Physics, Almaty, 050032, Kazakhstan
Joint Institute for Nuclear Research
Petersburg Nuclear Physics Institute
Institute of Nuclear Physics
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