Fast heating mixed energy spectrum critical reactor core capable of simultaneously transmutating minor actinide and long-lived fission product

Abstract

The invention discloses a fast heating mixed energy spectrum critical reactor core capable of simultaneously transmutating minor actinide and a long-lived fission product, a minor actinide transmutation area, a fissionable fuel breeding area, a long-lived fission product transmutation area, a reflection layer area and a shielding layer area are sequentially arranged from the center of the reactorcore to the outside, and the minor actinide transmutation area takes a mixture of MOX and MA as the fuels; the fissionable fuel breeding area takes MOX as the fuel; the long-lived fission product transmutation area takes a mixture of UO2 and LLFP as the fuels, and a graphite moderated layer is increased in a wall of a fuel component and a jacketing of a fuel rod; and a reflection layer and a shielding layer comprise graphite, boron carbide and a structural material. The high-energy neutron in the reactor core transmutates MA in the minor actinide transmutation area, the nuclear fuel breeds inthe fissionable fuel breeding area, the nuclear fuel is moderated into the low-energy neutron by the graphite layer in the wall of the fuel component and the jacketing of the fuel rod when entering the long-lived fission product transmutation area, the LLFP is effectively transmutated, the minor actinide and the long-lived fission product are transmutated while the use ratio of the neutron and theyield are increased.

Description

technical field [0001] The invention belongs to the technical field of nuclear engineering, in particular to a critical reactor core for simultaneous transmutation of minor actinide nuclides and long-lived fission products. Background technique [0002] The vigorous development of nuclear power has provided mankind with a large amount of clean energy, but it has also brought about many social and environmental problems. Among them, the most urgent problem is the large amount of high-level radioactive waste produced by the operation of nuclear power plants. If it is not properly disposed of, it will cause unpredictable radioactive hazards to humans and other living things on the earth. Especially long-lived high-level radioactive waste in spent fuel, including minor actinide nuclides such as Np, Am and Cm (referred to as MA) and 99 Tc and 129 Long-lived fission products such as I (abbreviated as LLFP) not only restrict the development of nuclear energy, but also pose long-t...

AI Technical Summary

Problems solved by technology

However, these subcritical systems require exogenous neutrons to be provided by spallation or fusion reactions between high-energy protons and target materials. Currently, neither proton targeting technology nor fusion technology can provide stable exogenous neutrons, and the cost of these two technologies is More expensive, related technologies need further research and development

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