Subcritical wrapping layer of transmutation of pressure pipe type long-lived fission product

Abstract

The invention provides a subcritical wrapping layer of transmutation of a pressure pipe type long-lived fission product. The subcritical wrapping layer of transmutation of the pressure pipe type long-lived fission product comprises a first wall, a transmutation area, a structural wall, a tritium breeding area and a shielding layer arranged from the outer side to the inner side in sequence. The transmutation area is cooled by high-pressure light water, and a pressure pipe type fuel assembly is adopted by the transmutation area. The transmutation area is cooled by high-pressure light water, and rich design and operation experience of a current nuclear power plant is effectively utilized. The light water has high moderating power, fissile nuclide of a fission wrapping layer in a thermal neutron energy spectrum has the high fission cross section, and energy magnification times of the wrapping layer are improved to a certain degree. Simultaneously, the pressure pipe type fuel assembly is adopted by the transmutation area, and the pressure of coolant is born by the pressure pipe type fuel assembly. The subcritical wrapping layer of transmutation of the pressure pipe type long-lived fission product is capable of effectively transmuting the long-lived fission product, and cost for design, and construction and operation of the wrapping layer is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of long-lived fission product transmutation, and in particular relates to a pressure tube type subcritical cladding for long-lived fission product transmutation. Background technique [0002] The fusion-driven subcritical hybrid reactor is composed of a fusion core and a fission cladding. The neutron source generated by the deuterium-tritium reaction in the fusion core drives the fission cladding to maintain a stable chain fission reaction. Due to the multiplication effect of fissile materials in the fission cladding on fusion neutrons and energy, the fusion technology required by the core is much smaller than that of pure fusion reactors, so it is generally considered to be an effective way to realize the early application of fusion energy. In order to verify the feasibility of full-scale controllable nuclear fusion technology, the International Thermonuclear Experimental Reactor (ITER) is under constructio...

AI Technical Summary

Problems solved by technology

At present, the fourth-generation reactor technology, including molten salt reactor, is still under research and design, and there is little relevant operating experience. If it is used in a hybrid reactor, it will further increase the design, construction, and operating costs of the hybrid reactor.

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