The neutron shielding aluminum-based boron carbide composite material preparation technology independently researched and developed by the Institute of Nuclear Physics and Chemistry of China Institute of Engineering Physics has passed the results appraisal. The new composite material prepared by the process can be widely used in fields such as pressurized water reactor spent fuel storage pool, spent fuel dry storage and transportation and other defense military nuclear engineering, large-scale scientific installations and other fields.
In the research team's scientific research, a complete process system including high-energy ball milling, powder preparation, molding, sintering, extrusion, rolling, and surface treatment for the preparation of new materials was established, and the high boron carbide content of the composite material was achieved. Density and excellent uniformity, and took the lead in the domestic study of accelerated irradiation performance of boron carbide composites. The research data show that the boron carbide distribution uniformity, mechanical, thermal physics, thermal neutron absorption, radiation resistance and corrosion resistance of the new composite materials meet or exceed the performance of similar foreign products, and can meet the existing fuel cell spent fuel pool storage grid 60 years radiation resistance performance requirements. The series of pilot scale-up experiments carried out by the researchers at the same time confirmed that the new process has good stability and amplification and laid a good foundation for the industrialization of the material.
As a leading result of breaking the monopoly of the spent fuel storage technology of reactors in developed countries, the Institute of Nuclear Physics and Chemistry of the Chinese Academy of Sciences has cooperated with Anhui Yingliu Electromechanical Group to carry out the industrialization of aluminum-based boron carbide composite materials for neutron shielding. Accelerate the implementation of production line design, procurement and construction of key equipment, and production line construction, and contribute to the realization of the third generation of nuclear power technology in China and reduce the cost of reactor construction. (Reporter Sheng Li)
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