Victory reports on Hualong No. 1 Linglong No. 1 are frequent
China's nuclear power "Ssangyong goes to sea"
Located in Fuqing City, Fujian Province, the world's first "Hualong No. 1" unit, and China National Nuclear Corporation's Fuqing Nuclear Power Unit No. 5 have completed charging recently, taking a solid step toward grid-connected power generation and commercialization.
On September 2, the executive meeting of the State Council approved the Hainan Changjiang Nuclear Power Phase II project and the Zhejiang Sanao Nuclear Power Phase I project, and approved the use of "Hualong One" technology.
"Hualong No. 1" is the country's most important weapon created by innovation by the Chinese nuclear industry, and it has become one of the "Chinese business cards" to the world.
Recently, the reporter came to China Nuclear Power Research and Design Institute, the research and development site of "Hualong One", and learned that the nuclear power "Ssangyong" pattern of "Hualong One" and "Linglong One" has taken shape. Nuclear medicine technology Applications are moving towards industrialization, and my country's nuclear industry is steadily advancing towards high-quality development.
Hualong One: Open a new era of nuclear power intelligent construction
Few people know that the birthplace of "Hualong One" is actually in a deep mountain more than 2,000 kilometers away from the world's first Fuqing nuclear power plant.
In the base code-named 909, R&D personnel creatively put forward the concept of "177 core".
This design of adding 5 sets of elements on each side of the 157 sets of cores commonly used in foreign countries constitutes the main feature of "Hualong No. 1" which is different from foreign technology, making the core refueling cycle longer from the usual 12 months By 18 months, increase the utilization rate of the power plant to more than 90%.
After more than 20 years of continuous exploration, the "177 core" has become a reality from a concept.
From the landing of the world’s first reactor in Fuqing in May 2015, to the start of construction of the Karachi overseas project in Pakistan in August 2015, and the start of mass construction of Zhangzhou nuclear power plant in October 2019, Chinese nuclear power people continue to inherit and optimize on the basis of independence. And innovation.
According to Xing Ji, chief designer of China National Nuclear Corporation's "Hualong No. 1" and chief engineer of China Nuclear Power Engineering Co., Ltd., the "Hualong No. 1" unit built at home and abroad pays great attention to experience feedback, and even Fuqing Nuclear Power No. 5 and 6 have started construction. The same is true between units.
From the appearance of the two units, it can be clearly felt that the nuclear island of Unit 5 is cylindrical, and the cylinder of Unit 6 has a triangular slope outside the cylinder, which serves as the steel structure support beam for the external water tank.
This change can directly eliminate the need for more than two months to build scaffolding and further ensure construction safety.
If the world's first reactor of "Hualong No. 1" was built from nothing, then Zhangzhou Nuclear Power was built from existence to excellence.
Zhangzhou in early September was still extremely hot.
The Zhangzhou nuclear power construction site was visited by people, but compared with the busy scene of tens of thousands of people at the Fuqing Nuclear Power Unit 5 project site during the same period, the number of workers at the Zhangzhou nuclear power construction site was further reduced.
In this regard, Wu Min, a staff member of China Nuclear Construction, introduced that this is mainly because the Zhangzhou project has carried out intelligent, automated exploration and transformation design during the general layout stage. The processing of steel bars has been automated, and the processing of embedded parts has realized robot operations. Finished in the workshop.
Laser cutting, automatic bending machines, crawling robots... These intelligent equipment are used extensively at the construction site of Zhangzhou Nuclear Power.
It is understood that the use of intelligent equipment has improved the automation and efficiency of the production and installation of large steel components, and improved the stability of product quality. The accuracy can reach 0.5 mm and the efficiency has increased by at least 2 times.
Compared with the world's first Fuqing nuclear power plant, the outstanding feature of the Zhangzhou project is the extensive use of high-efficiency tools.
Wu Min said that from the containment steel lining to the embedded steel bars, the stainless steel pool cladding and the embedded parts production line, the automation scope and degree of automation have been steadily improved, and the comprehensive application accounted for about 30%. Some core products such as the containment steel lining and large-scale The modular assembly of the sleeve and stainless steel pool cladding can be installed on site to achieve full implantation applications.
"Zhangzhou Nuclear Power has invested a lot in intelligence and automation. This is a good phenomenon. It can not only ensure quality, improve efficiency, but also reduce operational risks, and truly open a new era of intelligent nuclear power construction." Song Fengwei, general manager of China National Nuclear Power Zhangzhou Energy Co., Ltd. Said.
Nowadays, "Hualong No. 1" victory reports frequently.
While the world's first Fuqing Nuclear Power Unit No. 5 completed the charging, on September 5, the "Hualong No. 1" in Karachi, Pakistan's first overseas reactor K2 Unit of Karachi Nuclear Power completed the hot test.
In addition, the K3 unit has also completed the hoisting of the outer dome.
The staff told reporters that a "Hualong No. 1" unit contains more than 50,000 sets of equipment, involving more than 5,300 equipment suppliers.
The future batch construction will give full play to the scale and integration effects to promote the overall transformation and upgrading of the domestic high-end equipment manufacturing industry.
Linglong One: With higher safety and shorter construction period
In addition to the world's leading large-scale third-generation nuclear power technology "Hualong One", the development of modular small reactors with higher safety, economic efficiency, and shorter construction period is also the main direction of China National Nuclear Corporation. It has a name that is appropriate to its characteristics— -"Linglong One".
"Linglong One" integrates steam generators, reactors, main pumps, main pipelines, etc., can be modularized in the factory, transported to the site and installed quickly, and can achieve economies of scale through batch and rapid construction benefit.
"Independently innovated and developed a multi-purpose modular small-scale reactor "Linglong No. 1" with a thermal power of 385 MW and an electric power of 125 MW. It is complementary to a 1,000 MW large-scale reactor like the "Hualong No. 1". Although its power scale is small, However, the initial investment is relatively small, the construction period is shorter, the site selection conditions are simplified, the operation is more flexible, and the requirements for surrounding supporting facilities are relatively lower." said Song Danrong, chief designer of the "Linglong One" of China National Nuclear Corporation.
"Powering remote areas, heating cities, steaming industries, desalinating seawater in coastal water-scarce cities..." At the China Nuclear Power Research and Design Institute, the reporter saw that "Linglong No. 1" is a larger nuclear power plant in terms of function. The reactors are more abundant. In addition to nuclear power generation, flexible combination scales and rolling development and construction can be made according to user load requirements, which effectively reduces the investment cost of modular small reactors and ensures economic benefits.
For example, Song Tanrong said that in many areas in the north, two "Linglong No. 1" can just replace a 200 MW thermal power plant.
In addition, it can also be applied to small and medium power grids and regional power grids. Although this may not have a large domestic demand, in countries such as the United States and Britain, or countries in the Middle East and Africa, as well as small and medium-sized countries with small territories and populations, "Linglong One" has Strong market advantage.
From "Hualong No. 1" to "Linglong No. 1", China's nuclear power "Shuanglong going to sea" pattern is taking shape.
More than that, "Linglong No. 1" adopts "integrated" reactor design and "passive" safety system based on the existing mature PWR nuclear power technology, and its safety performance reaches the technical level of the third-generation nuclear energy system.
The International Atomic Energy Agency considered that "Linglong No. 1" is an innovative design of small pressurized water reactor, adopting "intrinsically safe + passive" safety design, which can handle extreme environmental conditions and various faults, reaching international and domestic advanced levels .
This advantage brings more convenience to the construction of "Linglong One".
"Application promotion can meet the energy needs of different fields and users, and is of great significance to the sustainable development of my country's economy." Qin Zhong, deputy chief designer of "Linglong One" of China National Nuclear Corporation, introduced.
On July 18, 2019, China National Nuclear Corporation announced the launch of my country's multifunctional modular small reactor (Linglong No. 1) demonstration project.
"This demonstration project is a commercial demonstration project to verify design, manufacturing, construction and operation technologies, accumulate valuable experience in small nuclear power plants, and serve as a powerful supplement to other energy sources and large nuclear power plants in the future energy market, and gradually open up small reactors for commercial use. Market." Qin Zhong said.
Nuclear technology application: Solving the stuck neck problem in the development of nuclear medicine
"Don't look at this small bottle of solution, but it is my country's first nuclide drug for the clinical treatment of rheumatoid arthritis." Yunke Pharmaceutical, which was incubated by China Nuclear Power Research and Design Institute, was produced here. The "Yunke" injection produced has a total effective rate of over 85% for rheumatoid arthritis, which can relieve the pain of millions of patients.
Medical isotopes are specific therapeutic drugs for a variety of cancers and difficult diseases.
It is understood that in the medical isotope market in my country, molybdenum-99, iodine-125, lutetium-177 and other medical isotopes in large quantities are all dependent on imports. A small number of isotopes such as iodine-131 are domestically produced, but they cannot meet the needs of the domestic medical market .
In the next few years, the major global production reactors of medical isotopes will face decommissioning, the production capacity of medical isotopes will shrink significantly, and the global supply of isotopes will face a tight situation.
This makes my country's medical isotope industry enter the international market, and occupy the high ground of scientific research industry to usher in a period of opportunity and window period.
"The application of nuclear technology is the propellant of'Healthy China'." Yu Jianfeng, Secretary of the Party Leadership Group and Chairman of China National Nuclear Corporation, said that China National Nuclear Corporation is making every effort to enter the field of nuclear technology applications, with the mission of serving a healthy China and precision medicine strategy to completely solve my country's nuclear medicine Develop the "stuck neck" problem, which is heavily dependent on imports, and create a new national name card for "medical isotopes and drugs" in my country.
Strontium-89 nuclide is the main raw material of strontium chloride injection. This medicine has the characteristics of good curative effect and low toxicity for the treatment of prostate cancer and breast cancer bone metastasis pain.
The domestic demand for strontium-89 reached 50 Curies. Before this year, the raw material of strontium-89 was completely dependent on foreign imports, and the market supply was unstable and severely controlled by others.
In order to realize the localization of production and break the technological monopoly of foreign countries, China National Nuclear Corporation used its abundant stacking resources and the R&D team used new technologies and new processes to carry out research and development of urgently needed medical isotope production technologies including strontium-89.
"In April this year, the first batch of domestically produced strontium-89 was officially delivered, and the relevant indicators have been verified by experts to reach the international advanced level. This product delivery means that my country has successfully completed research and development, reactor operation, irradiation, and product production in this field. The key technology of the process solves the dilemma that medical isotopes are heavily dependent on imports and the core raw materials are "stuck-necked", and formally have the ability to supply strontium chloride." said Yao Weihua, assistant to the director of China Nuclear Power Research and Design Institute.
In addition to drugs, nuclear medicine also involves cutting-edge medical devices and medical methods.
The use of proton beams to treat cancer is currently the most advanced medical method. Proton beams can maximize the protection of normal human tissues in the process of bombarding cancer cells.
"Like a depth-water bomb, when it reaches a certain depth and closes to the target, it can be accurately killed by fixed-point blasting." Yao Weihua said. However, since the core technology of the whole set of equipment was previously imported from abroad, patients receiving proton beam therapy often have to bear a high burden. cost of.
After years of tackling key problems, China National Nuclear Corporation successfully developed a 100 megaelectron volt proton cyclotron independently, making China a country with a new generation of radioactive nuclear beam accelerators.
In September 2018, China National Nuclear Corporation's first proton therapy demonstration project officially started construction in Tianjin Binhai, and it is planned to have clinical trial conditions in 2021.
After completion, it will play an effective role in the treatment of malignant tumors such as head and neck tumors, prostate cancer, breast cancer, liver cancer, lung cancer, and children's tumors. At the same time, it can reduce medical costs and reduce the burden of patients, which has significant social benefits.
"The ultimate goal of solving the problem of medical "stuck neck" and realizing autonomy and localization is to allow ordinary people to benefit from it." The relevant person in charge of China National Nuclear Corporation said at the end of the interview.
(Our reporter Xue Peng Jiang Yongbin)