Gadolinium-rich nickel-based alloy material for reactor spent fuel storage and preparation method thereof

Abstract

The invention discloses a gadolinium-rich nickel-based alloy material for reactor spent fuel storage. The material is mainly prepared from the following components in percentage by mass: less than or equal to 0.03% of C, less than or equal to 0.02% of N, less than or equal to 0.01% of S, less than or equal to 0.03% of P, 18.0-35.0% of Cr, 0.5-5.0% of Gd, 0-10.0% of Fe, and the balance Ni and inevitable impurities. An alloy melt is obtained through batching and vacuum induction melting; and casting, hot forging, hot rolling, annealing treatment and other processes are carried out to obtain the gadolinium-rich nickel-based alloy material bar or plate for reactor spent fuel storage finally. The gadolinium-rich nickel-based alloy material has the advantages of high strength, low cost, excellent corrosion resistance, excellent processing formability and the like.

Description

technical field [0001] The invention relates to a nickel-based alloy material and a preparation method, in particular to a nickel-based neutron absorbing material and a preparation method, which are applied in the technical field of nuclear functional iron and steel alloy materials. Background technique [0002] As an efficient and clean energy source, nuclear energy is hailed as one of the three major inventions of mankind in the 20th century, which has brought mankind into a new world of using physical atomic energy to change life. In the core of a nuclear reactor, when the concentration of fissile isotopes drops to the point where the given power cannot be maintained, the fuel in the core becomes spent fuel and needs to be unloaded. As most of the spent fuel is unloaded by nuclear power plants due to the expiration of the working life, the capacity of the reactor storage pool is becoming saturated, so the problem of the whereabouts of spent fuel has become a global proble...

AI Technical Summary

Problems solved by technology

However, the solubility of boron in stainless steel is low, and excessive boron addition will precipitate borides (Fe, Cr) 2 B, resulting in greatly reduced hot ductility, and it is very difficult to prepare boron steel with higher boron content

B 4 C / Al neutron absorbing material has complex process, B 4 The serious interface reaction between C and Al, corrosion resistance, radiation resistance, and aging during use limit the application and development of neutron absorbing materials.

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