"Chief Li, I really can't give you a definite time when this accelerator-driven spent fuel cycle technology will be realized, and the difficulty of this system technology is even more complex and difficult than that of the fourth-generation nuclear power plant reactor technology. ”

Bai Jili said.

Li Kaiyuan opened his mouth and said: "Let's talk about the difficulties of this set of techniques." ”

"Okay, Chief Lee. ”

Bai Jili took a breath and said, "Chief Li, to put it simply, this system technology requires an extremely powerful spallation neutron source to make the transuranic elements neptunium, americium, and curium fission into short-lived nuclides to eliminate the long-lived transuranic element. ”

"The proton accelerator used by our institute does not produce enough energy, and now it can only produce pulsed protons, and the neutron source produced in the experiment is not enough, and the neutrons introduced into the experimental reactor cannot fission those transuranic elements very well. ”

"If we want to make these transuranic elements continue to fission, we need proton accelerators that are more energetic and can work for a long time, and proton accelerators are not our research institute's strong point, which needs to be developed by other research departments. ”

"But to develop such a strong and stable neutron source, this is a very large scientific research project......

Bai Jili also knows that such an advanced neutron source is a very large engineering project, costing billions, even if the country wants to embark on such a project, it is a very cautious thing.

The research and development project of the Institute of Atomic Energy Science and Technology has only invested less than 200 million yuan in the Qixing-1 project, and the research institute can only make a zero-power device with a power of less than 100 watts.

"In addition, even if we have developed an advanced spallation neutron source, our transuranic element incinerator uses actinides, which are highly radioactive elements, so the design of this reactor is even more complex than the core of the fourth-generation nuclear power plant, because of the existence of extremely high-energy protons and neutrons, the first and secondary nuclear reactions in the core are varied, the products are complex, and the number of elements involved is huge, simulation calculations, and experimental measurements all bring great challenges. ”

"In fact, we still have no scale in the extraction and separation of spent fuel in China, although we are original and very advanced in the extraction technology of nuclear waste, but in the industrialization research and follow-up investment has not kept up, so far it has not been transformed into a treatment device, and at this stage it is mainly at the technical level. ”

"Comparatively speaking, I think it is more realistic and reliable to increase the extraction and separation technology of nuclear waste......

"Ahem," Tu Jianfeng coughed, and said in his heart that this Dean Bai is too sincere, and this time I came here to mention the importance of the technology of the accelerated recycling system of spent fuel to this Chief Li, so wouldn't it pour a basin of cold water on the chief's head, and how to get more R&D funds in the future!

"Chief, the extraction and separation technology just mentioned by Dean Bai is also an important part of this spent fuel treatment. ”

Tu Jianfeng said.

"Yes, spent fuel reprocessing is a key link in the nuclear fuel cycle, and it is also a bottleneck that restricts the sustainable development of nuclear power. Because the rare earth elements in the fission products generally have a large neutron absorption cross-section, known as neutron poisons, which seriously affect the transmutation of secondary actinides, they must be effectively separated and removed. ”

Li Kaiyuan glanced at Yang Jie, "Xiaojie, what do you think?"

"Before I came, I also asked experts from the Institute of High Energy Physics of Meixihu University that there is a lack of basic research in the technology of accelerated cycle spent fuel systems. The neutron source that keeps an ordinary reactor running and neutron-triggered fission is low in energy. The maximum neutron energy does not exceed 10 megaelectron volts, and the various reaction cross-sections can be measured experimentally. ”

"However, in this set of technology, as far as I know, the highest energy of a single energy neutron source in the laboratory of the Institute of Atomic Energy Science and Technology is only 14 trillion electron volts, which can maintain the continuous fission of a variety of transuranic elements, and the generation of higher energy neutrons can only be experimented by spallation neutron sources, and at this stage, it is impossible to maintain all transuranic elements by relying on neutron sources with fixed energy spectrum, and can only be experimented with one element. ”

Yang Jie said: "In fact, our Huaxing Group has completed the design of a large-scale spallation neutron source device, and we will start construction in Tanzhou City in the second half of this year. ”

"Why didn't you just say this?"

Li Kaiyuan was also stunned, and then said to Yang Jie with a smile.

"The design of our company's device has just been completed, and I would like to wait until the start of construction to report back to you. ”

Yang Jie said with a smile.

"Chairman Yang, you Huaxing Group Company wants to build its own spallation neutron source facility?"

Bai Jili also opened his mouth wide.

"No, I'm paying for it. ”

Yang Jie said with a smile.

Bai Jili's mouth opened wider.

The neutron source facility that was completed two years ago was led by the Ministry of Energy and built by six national laboratories under the leadership of the Ministry of Energy, and cost more than 9 billion yuan to complete.

It is unheard of for this young man in front of him to say that he has paid out of his own pocket to build such a large-scale scientific experiment facility!

"I hope that this large scientific facility will be completed within six years, and that it will be able to provide the world's strongest pulsed and continuous-wave neutron beams for scientific research and industrial development, and that researchers from all over the country and abroad will be able to study the materials science that forms the basis of energy, communications, manufacturing, transportation, new technologies, information technology, biotechnology and health, which will play a great role in accelerating our domestic basic research in materials." ”

According to the design, the facility will have a total of two target device buildings, each of which will house 24 neutron beam instruments, and a total of 48 beam experiment stations. ”

Li Kaiyuan opened his mouth and asked, "How confident do you have in building this facility?"

"I'm still very confident in this. ”

Yang Jie said with a smile: "The previous large scientific device design team of Huaxing Group has designed and built a Shenguang light source facility before, and the entire Huaxing Group has been trained, and the technical aspects are also ready. ”

Li Kaiyuan nodded: "You are confident, I still agree with this matter." ”

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