Preparation method of composite tubular part for moderating neutrons in nuclear reactor

Abstract

The invention relates to preparation of nuclear radiation protective materials, in particular to a preparation method of composite material tube-shaped parts used for a nuclear reactor moderated neutron. For solving the problem that for an existing preparation method of the composite material tube-shaped parts used for the nuclear reactor moderated neutron, the technological process is relativelycomplicated, and meanwhile, shaping of the tube-shaped parts adopts a welding technology, so that the made tube-shaped parts are not good enough in performance, the preparation method of the compositematerial tube-shaped parts used for the nuclear reactor moderated neutron adopts a spark plasma sintering technique to prepare an aluminum base graphite composite material blank. Mechanical processing is conducted on the aluminum base graphite composite material blank prepared through sintering. More than one time of spinning forming is conducted on the aluminum base graphite composite material blank after mechanical processing by using a method of strong spinning, and finally, a thin-walled tube-shaped part is formed by spinning. Spinning is beneficial for improving mechanical properties such as density, strength and hardness of the composite materials, and meanwhile the using ratio of the materials is improved, and the manufacturing cost is reduced. A prepared finished product can be used for spent fuel storage as well as a nuclear power station middle tube-shaped shielding body and the preparation method of the composite material tube-shaped parts used for the nuclear reactor moderated neutron is an advanced method for preparation of the composite material tube-shaped parts.

Description

technical field [0001] The invention relates to the preparation of nuclear radiation protection materials, in particular to a preparation method of a composite material tubular part for moderating neutrons in a nuclear reactor. Background technique [0002] Graphite is widely used as a neutron moderator in reactors due to its large neutron scattering cross section, small absorption cross section, low mass number, and high atomic density per unit volume. The mechanism of neutron moderation is the elastic scattering of neutrons and moderator material atoms, and the energy carried by it is transferred to the moderator material atoms. Graphite is the best moderator material except heavy water, and it is cheap and High temperature resistant materials. Aluminum alloy is widely used in aviation, aerospace, nuclear power and other fields due to its excellent processing performance, excellent corrosion resistance, high toughness and good radiation resistance. Graphite is added to a...

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problem that the existing method for preparing a tubular piece made of composite material for moderated neutrons in a nuclear reactor has a relatively complicated technological process, and at the same time, the forming of the tubular piece adopts a welding process, so that the performance of the produced cylindrical piece is not good. It provides A kind of preparation method of composite material tubular part for moderated neutron in nuclear reactor

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