Preparation method of tritium multiplication ceramic pellet in fusion reactor solid blanket

Abstract

The invention discloses a preparation method of a tritium multiplication ceramic pellet in a fusion reactor solid blanket. A polymer auxiliary settling method is used; a micron order lithium oxide tritium multiplication ceramic powder is used as raw materials; during the ceramic slurry preparation, polymerizable organic monomers are added. When slurry liquid is dropped in viscous liquid and falls,the gravity, the liquid buoyancy and the viscous resistance are balanced, so that slurry liquid drops with high sphericity degree are obtained. Meanwhile, in the falling process, the spherical liquiddrops are polymerized to be cured into a pellet blank. In the sintering process, the pellet blank is subjected to ceramic treatment; the ceramic pellet with high sphericity degree is obtained. By optimizing the technological process and sintering schedule, the mechanical strength, the sphericility degree and the porosity of the pellet can be further improved. The preparation conditions of the pellet blank are mild; in the settling process, the two processes of palletization and curing are simultaneously completed; the purification and transfer processes of the ceramic pellet are simplified; the obtained product has high sphericility degree, particle diameter uniformity, high porosity and high mechanical strength; the industrial production is convenient.

Description

technical field [0001] The invention belongs to the field of advanced nuclear reactor fuel research, in particular to a method for preparing tritium multiplication ceramic pellets in the solid cladding of a fusion reactor. Background technique [0002] With the continuous growth of the world's energy demand, the consumption rate of fossil energy on the earth is accelerating, and it can only be used by human beings for 200-300 years, which has also brought about increasingly prominent environmental problems. Nuclear fusion energy has obvious advantages in terms of energy storage, cleanliness and environmental protection, and is one of the most promising ways for human beings to completely solve energy problems. The raw materials for the fusion reaction are hydrogen isotopes deuterium and tritium. Deuterium can be extracted from seawater, while tritium is radioactive, and its content on the earth is very small. It needs to be produced from Li and high-energy neutrons through n...

AI Technical Summary

Problems solved by technology

The ceramic balls prepared in this way have high sphericity, but due to the low solid content of the slurry, the porosity of the balls after sintering is too high, and the mechanical strength is low; in addition, the existing indirect wet method uses cryogenic technology and high temperature at the same time The sintering technology has high requirements on the transfer technology of small spheroid bodies, and it is difficult to produce on a large scale

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