The nuclear waste is “eaten and dried”. Accelerator-driven advanced nuclear energy system project cooperation agreement signed

He Hua, member of the National Committee of the Chinese People's Political Consultative Conference and chairman of China General Nuclear Power Group Co., Ltd., revealed at the group meeting of the CPPCC on the morning of the 9th that CGNPC signed a cooperation agreement with the Chinese Academy of Sciences on the 9th to jointly promote the Accelerator Driven Advanced Nuclear Energy project. Construction of System, ADANES). The project will build a demonstration reactor in Huizhou City, Guangdong Province, and commercialize it in about 20 years.

He Wei told the Science and Technology Daily reporter that one of the most important problems facing the development of nuclear power is the disposal of spent fuel. Spent fuel is a spent nuclear fuel that has been exposed to radiation and contains a large amount of radioactive elements. "Some of these elements have very long half-lives and require tens of thousands or even hundreds of thousands of years of decay, and their radioactivity can reach the level of natural uranium."

How to shorten the half-life of such elements? Accelerator Driven Sub-critical System (ADS) is internationally recognized as the most promising technical approach to nuclear waste. The data show that the working principle is that the high-energy high-flow proton beam generated by the accelerator is used to bombard the heavy nucleus to generate a broad spectrum, and the high-flux neutron is used as an external source to drive the fission material in the subcritical core to undergo a continuous chain reaction. Long-lived radionuclides eventually become non-radioactive or short-lived radionuclides and maintain reactor operation. “In short, it can shorten the lifespan of some of the too long-lived radionuclides in spent fuel; at the same time, the heat generated by these elements can also be used as an energy source to achieve the reuse of spent fuel.” He Wei explained.

In January 2011, the Chinese Academy of Sciences launched the ADS pilot project. Based on the implementation of the pilot project, the new concept and scheme of ADANES was proposed, and the simulation test of the principle was basically completed. “It can be said that the project can dry out nuclear waste and generate energy. We are already at the forefront of the world in spent fuel treatment technology.” Cai Xiaohong, a researcher at the Institute of Modern Physics of the Chinese Academy of Sciences, said that this technology If it can go to reality smoothly, it will lead the innovation and development of international nuclear fission energy for a long time.

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