Graphite has a good neutron moderator used in atomic reactors, and uranium-graphite reactor is one of the most used atomic reactors. The deceleration material in the nuclear reactor used as power should have high melting point, stability, and corrosion resistance. Graphite can fully meet the above requirements. The purity of graphite used in atomic reactors is very high, and the impurity content should not exceed dozens of PPM. Especially the boron content should be less than 0.5PPM. In the defense industry, graphite is also used to make solid fuel rocket nozzles, missile nose cones, parts of aerospace equipment, heat insulation materials and radiation protection materials.

Graphite furnace atomic absorption spectrometry is a spectrometric method that uses a graphite-coated furnace to evaporate samples. In short, this technology is based on the fact that free atoms can absorb light of a certain frequency and wavelengths with elements of special interest. Within a certain range, the absorbed light wave can be directly connected with the object to be analyzed. Free atoms of many elements can be extracted from samples at high temperatures. In graphite furnace atomic absorption spectrometry, the sample is stored in a small graphite cube coated with graphite or pyrolytic carbon. This cube can be heated to evaporate and decompose the sample in the future. We can calibrate the instrument according to the known concentration, and determine the degree of concentration through the working curve.

With the continuous development of science and technology, people have also developed many new uses for graphite. Flexible graphite products. Flexible graphite, also known as expanded graphite, is a new graphite product developed in the years. In 2009, the United States successfully researched flexible graphite sealing materials and solved the leakage problem of atomic energy valves. Subsequently, Germany, Japan and France also began to develop and produce. In addition to the characteristics of natural graphite, this product also has special flexibility and elasticity.

Therefore, it is an ideal sealing material. Heat insulation, high temperature resistance and radiation protection materials: nuclear reactor neutron decelerator and anti-atom radiation shell and rocket nozzles, missile nose cones, aerospace equipment parts, heat insulation materials, radiation protection materials, etc.

It is understood that the high-temperature gas-cooled reactor is currently recognized by the international nuclear energy community as a type of reactor with good safety characteristics. It is in a leading position in the world's nuclear reactor safety improvement trend after the Three Mile Island nuclear accident in the United States. The research work of high-temperature gas-cooled reactors in my country has been included in 16 major national special projects.

As for how graphite materials are used in high-temperature gas-cooled reactors, Wu Yulong used a simple analogy of briquette furnaces to illustrate the application of graphite materials: "At the moment when nuclear power is shut down, nuclear power plants cannot be stopped instantly. Residual heat. If the nuclear reactor is a briquette furnace, then the nuclear graphite material we are studying is the insulation layer that can radiate the heat little by little and is a heat dissipation moderator."