Abstract
Burial of radioactive waste is an urgent contemporary problem. The development of materials for the disposal of radioactive waste is also topical. In this paper, we consider the possibility of using mica to solve these problems. Mica has been known for a long time and studied by researchers from almost all countries of the world. The areas of its use are constantly expanding and renewing. Mica has high electrical insulation properties. Because of this, the field of application of mica was the electrotechnical industry for a long time. Currently, the range of using mica is quite wide. In this paper, attention is paid to the relatively promising areas of its use. The possibility of using composite materials based on mica as materials for protection against radioactive emissions and disposal of radioactive waste is considered. The object of the study: samples of a composite material based on mica, or the mikalexs. The method of recording ionizing radiation and the mass spectroscopic method were used to study linear coefficients of μ attenuation from gamma radiation of mikalexes on the basis of various micas after bombardment with 5 MeV, 10 MeV, 25 MeV electron beams. We used: a cesium source of γ-radiation with E = 0.661 MeV and a cobalt source with E = 1.25 MeV. Research results on the μ linear attenuation coefficients on γ-radiation of mikalexes based on various micas after their bombardment with electron fluxes showed that electron bombardment increases the penetrating power of gamma radiation in the mikalex. The dependence of the coefficient of linear attenuation on the type of mica used was determined. A new field of use of composite materials based on mica (micalex) for radiation protection and the disposal of radiation waste and their use in ultrahigh vacuum.
Highlights
Burial of radioactive waste is an actual problem of our time
Our research has shown that the promising material can be the composite material mikaleks being obtained by hot pressing of small-sized mica and low-melting glass, as a result of which a monolith with high electrophysical and mechanical properties is formed, which is not exposed to moisture, most acids, and can withstand complex processing [7, 8, 22]
The conducted tests of the linear attenuation coefficients μ on gamma radiation of mica-lexes of different composition after bombardment of them with 5 MeV, 10 MeV, 25 MeV electron fluxes have shown that electron bombardment increases the penetrating power of gamma radiation in the mikalex
Summary
Burial of radioactive waste is an actual problem of our time. Radioactive wastes are nuclear materials and radioactive substances, the further use of which is not foreseen. Waste is the main long-lived source of radiation associated with nuclear energy. According to the International Atomic Energy Agency (IAEA), it has been established that more than 200,000 tons of spent nuclear fuel have been accumulated in the world. 5-6 tons of spent nuclear fuel are added. This problem is an actual problem for the Irkutsk region. There are two enterprises for the disposal of radioactive waste, namely the “Rodon” and the electrochemical plant in Angarsk (AECC) [1]
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