Nuclear grade artificial graphite powder for a high temperature gas cooled reactor fuel element and a method of producing the same

Abstract

This invention provides a nuclear-grade artificial graphite powder for high-temperature gas-cooled reactor fuel elements and its preparation method. The nuclear-grade artificial graphite powder comprises aggregate powder and a binder as raw materials. The aggregate powder is at least one selected from petroleum coke powder, needle coke powder, and pitch coke powder. The average particle size of the aggregate powder is 20-40 μm, and the specific surface area is 2-6 m². 2 / g, the binder is a phenolic resin solution, and the mass ratio of the aggregate powder to the phenolic resin in the phenolic resin solution is 1:(0.2-0.5); the nuclear-grade artificial graphite powder is obtained by mixing, carbonizing, crushing and classifying the raw materials and then graphitizing them. The performance of the nuclear-grade artificial graphite powder meets the technical requirements of high-temperature gas-cooled reactor fuel elements, and the performance of different batches of products is stable; in addition, the preparation cycle is short and the preparation cost is low.

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