The reporter learned today from China Nuclear Group that China's first independently developed zirconium alloy material that meets the requirements of the third generation nuclear power-CF3 nuclear fuel assembly N36 zirconium alloy material. The first batch of products successfully passed the acceptance test and was shipped for CF3 nuclear fuel components. Manufacturing. This indicates that China has broken the "neck neck" link of long-term foreign monopolies and taken a solid step on the road of large-scale application.
Fuel assemblies are the core of nuclear reactors, and their safety and reliability depend to a large extent on zirconium alloy cladding. Zirconium alloy material is the key structural material of the nuclear reactor core. As the "skeleton" and "skin" that constitute the fuel assembly, zirconium alloy is known as the "first safety barrier" of nuclear reactors and plays an important role in the safe and stable operation of nuclear power plants. It is one of the important indicators for evaluating the development level of fuel assemblies. For a long time, zirconium alloy materials for domestic nuclear power plant fuel assemblies have basically relied on imports. Zirconium alloy materials have become a major bottleneck restricting the development of China's nuclear fuel industry and a major shortcoming of the nuclear fuel industry.
For this reason, in 2010, China Nuclear Group launched the key technology special project of “Pressure Water Reactor Component Design Technology”, and made it clear that CF3 takes the new cladding material N36 zirconium alloy as a breakthrough. Since then, China Nuclear Power Research and Design Institute lasted 8 years, and after 6 major stages of technological research, successfully mastered the complete N36 zirconium alloy engineering preparation technology with independent intellectual property rights. It is reported that China Nuclear Group has initially established a zirconium alloy industrial system covering scientific research, pilot test, mass production and application.