Chinese scientists raise uranium utilization to 90%

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Chinese scientists raise uranium utilization to 90%

Four years ago, Chinese scientists completely independently researched and developed and debugged. After 24 years of hard exploration, they mastered the nuclear reactor reactor technology and became the world’s 8th country that can achieve spent fuel reprocessing for power reactors.

Now, we have taken a historic step in the hybrid reactor technology. Science and Technology Daily learned from the Institute of Nuclear Physics and Chemistry of the Chinese Academy of Sciences that the fusion fusion research center has initially completed the conceptual design of the Z-pinch fusion-fission hybrid reactor with a thermal power of 3,000 megawatts.

As a sub-critical nuclear reactor between fusion reactors and fission reactors, it can extend the current state of nuclear fuel resources for only 100 years to thousands of years. It is not excessive to call the energy revolution or the industrial revolution.

Let us first understand the foreseeable cost. If a nuclear power plant adopts the Z collapsing-driven hybrid reactor scheme, the construction cost is low, the material consumption during operation is small, and the waste is small. Data show that for a 1 million-kilowatt nuclear power unit, the cost of a pure fusion reactor pile is greater than US$10 billion, that of a fast reactor is US$5.0 billion to US$6 billion, that of a thermal reactor is approximately US$2 billion, and that of a Z-coarse-driven hybrid reactor is US$3 billion. about.

At the same time, the fuel consumption of the Z-cock-driven hybrid reactors was 1 tonne of uranium per year, resulting in waste of 1 tonne per year, and the waste disposal resources were small.

OK, here's how it works.

The fusion-fission reactor concept was proposed by academician Peng Xianjue of the Chinese Academy of Sciences in 2009. According to the scheme, the main part of the Z-pinch fusion-fission hybrid reactor consists of a Z-pinch fusion core, a fission cladding, a crucible blanket and a fuel circulation system. Etc.

In the fusion reactor core, the 60 megaampere output current from the heavy-duty drive generates a powerful Lorentz force that causes pinching and outputs a large amount of high-energy fusion neutrons; it is wrapped in the fusion core under the action of high-energy fusion neutrons. The surrounding uranium-238 undergoes a fission reaction that produces stable and controllable output of huge energy; the fissile blanket leaks neutrons for calving, and realizes a “self-sustaining” cycle of the helium in the fuel circulation system.

Huang Hongwen, deputy director of the fusion fission hybrid research center, said that the Z-pinch fusion-fission hybrid reactor can achieve depleted uranium or spent fuel and take into account the metathesis of secondary radon metastasis, raising the uranium utilization rate to over 90%.

In addition, the reactor does not produce spent fuel in the traditional sense, and has low environmental emissions. It is also conducive to nuclear proliferation. The cladding uses deep criticality and good heat transfer design. The critical safety and residual heat safety performance are outstanding.

Controlled nuclear fusion is currently the most cutting-edge technology for human beings, and our country's hybrid reactor can be said to be further explored under this background.

Spent Fuel: Nuclear power plants generate energy by fission reaction of nuclear fuel in nuclear reactors. Just like coal power stations continue to add coal, when nuclear fuel can't maintain a certain amount of power, it needs to be replaced. These replaced nuclear fuel assemblies are called spent fuel. fuel.

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