Preparing method of neutron absorbing plate for storage and transportation of nuclear fuel

Abstract

The invention relates to a preparing method of a neutron absorbing plate for the storage and the transportation of nuclear fuel. Aiming at the condition of releasing spent fuels through a nuclear reactor, a nuclear protection neutron absorbing plate is prepared by using aluminum alloy powder and boron carbide powder as raw materials through cold pressing blank preparation, vacuum hot pressing, extrusion forming, rolling and surface shot blasting. For the preparing method, the technology is advanced, the data is precise and detailed, the compactness of the metallurgical structure of the prepared neutron absorbing plate is good, the boron carbide in the matrix is uniformly distributed and tightly combined, the Rockwell hardness reaches 50 HRB, the tensile strength reaches 280 MPa, the yield strength reaches 240 MPa, the fractured growth is 2%, the impact toughness reaches 15 J / cm<2>, the density reaches 2.636g.cm-3, the consistency is 99.9%, the local density difference is less than or equal to 0.01%, and the absorbing rate of neutrons is 90%, so that the preparing method is an ideal preparing method of the nuclear protection neutron absorbing plate.

Description

technical field [0001] The invention relates to a preparation method of a neutron absorbing plate used for nuclear fuel storage and transportation, and belongs to the technical field of preparation and application of nuclear protection materials. Background technique [0002] Nuclear power is a high-tech clean energy. The core technology of nuclear power generation is the nuclear reactor. During the operation of the nuclear reactor, a large amount of spent fuel will be unloaded. These spent fuel is extremely radioactive and accompanied by neutron emission rate. In the process of storage and transportation, the critical control and safety protection of spent fuel is a major scientific problem; there are two ways to store spent fuel: one is wet storage, which is to store spent fuel on the grid of the pool; It is dry storage, which stores spent fuel in containers. The materials of containers required for wet storage and dry storage must have nuclear protection properties to pre...

AI Technical Summary

Problems solved by technology

[0003] At present, most nuclear protection materials have weak protection performance and low mechanical properties, and it is difficult to effectively protect against nuclear radiation and leakage.

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