To achieve a 60-fold increase in the utilization of uranium for nuclear fuel recovery in China
ã€Abstract】 Chinese scientists have made major technological breakthroughs in nuclear research: they achieved the recovery of uranium and plutonium (the same “bubâ€) material from nuclear fuel after burning in nuclear power reactors. If we can recycle the plutonium material on a power reactor, it means that the uranium resources that have been proven in China can only be used for about 50 to 70 years and become sufficient for 3,000 years.
The technical name of this technology is called "power reactor / spent fuel / post-processing technology." According to experts, nuclear power plants generate electricity through the fission reaction of nuclear fuel in nuclear reactors and release energy. Like the coal-fired power station is constantly adding coal: When the nuclear fuel can not maintain a certain power, it also needs to be replaced. These replaced nuclear fuel assemblies are called spent fuel. In layman's terms, spent fuel is similar to the “cinder†in thermal power stations, but it is definitely not “cinder†but “big babyâ€.
Because of nuclear power technology in the world today, nuclear fuel has only burned 3% to 4% or so, it can not maintain the rated power. These nuclear fuels also generate new nuclear fuel during the combustion process.
Wang Jian, chief engineer of China Nuclear Power Group's post-processing pilot project, then we need to reprocess the nuclear fuel at this time, that is, through a series of chemical processes, put nuclear fuel that has not been burned out of the nuclear power plant, as well as newly produced nuclear fuel. Made of the fuel elements that we need for nuclear power.
The principle of recycling sounds simple and the operation is extremely difficult. How to cut, separate, extract, purify, etc. the components that have extremely strong nuclear radiation and fatal damage to the human body? Every step is a problem. After 24 years of scientific research, Chinese scientists have finally broken through a full set of technological systems after repeated experiments.
Wang Jian, chief engineer of China Nuclear Power Group's post-processing pilot project, is solely responsible for such a facility independently designed, built, and independently developed by China.
China Nuclear Power Group's post-processing pilot commander Wang Junfeng: We had a qualified uranium product and a plutonium product for the last time (test), so we said we succeeded.
Sun Qin, general manager of China National Nuclear Corporation: In the industry of nuclear fuel, we are one of the very few countries that can form a nuclear fuel cycle. Therefore, we will be able to have both the entire technological level and the technological level in the international community. Rights can even play a guiding role.
Previously, France, the United Kingdom, Russia, Japan, India and other countries have mastered the spent fuel reprocessing technology for power reactors. However, each country in its core technology system is strictly confidential. China's nuclear fuel has been developed for more than 20 years. At present, there are already 13 nuclear power plants that have been built. Each year, a large number of spent fuel assemblies are produced. Before this technology is mastered, there is only one approach - storage.
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