People’s Daily: Innovation, Dedication and Brave Climbing the Peak
In January 2015, General Secretary of the Supreme Leader made important instructions on the 60th anniversary of the founding of China’s nuclear industry, stressing that the nuclear industry is a high-tech strategic industry and an important cornerstone of national security. It is necessary to adhere to safe development and innovative development, adhere to the peaceful use of nuclear energy, comprehensively enhance the core competitiveness of the nuclear industry, and continue to write a new brilliant chapter in China’s nuclear industry.
On December 15th, 1991, Qinshan Nuclear Power Station, the first self-designed and self-built nuclear power station in China, was connected to the grid for power generation, making China the seventh country in the world to design and build its own nuclear power station.
Today, Qinshan nuclear power plant has been operating safely for 30 years. After completion, the total installed capacity of Qinshan nuclear power base is 6.6 million kilowatts, the annual power generation is about 52 billion kWh, and the cumulative safe power generation is 690 billion kWh. It has become the nuclear power base with the largest number of nuclear power units, the most comprehensive reactor type and the richest nuclear power operation and management talents in China.
On the basis of ensuring the safe operation of Qinshan Nuclear Power Station, China National Nuclear Corporation (hereinafter referred to as CNNC) insists on scientific and technological innovation as a strategic basis, focuses on key technologies of nuclear energy, and builds the third generation of independent nuclear power technology "Hualong No.1", which has become a "national business card" that highlights China’s independent innovation capability.
Realizing "Zero Breakthrough" of Nuclear Power
Starting from Haiyan County, Jiaxing City, Zhejiang Province, all the way south to the foot of Qinshan Mountain. Under the shadow of cement buildings, there is a white building, and the high-voltage iron tower and thick transmission lines standing on the distant hills are connected with it. This building is the first 300,000 kW PWR nuclear power plant in China. The green energy output from nine operating units in and around here has been continuously imported into East China Power Grid, meeting the energy demand in the Yangtze River Delta region.
Time goes back to the 1970s. On February 8, 1970, Shanghai conveyed the spirit of Premier Zhou Enlai’s instructions on building nuclear power, and Qinshan Nuclear Power Station, China’s first independent nuclear power station, was named after the "July 28 Project".
In 1982, at the Fifth Session of the Fifth National People’s Congress, China solemnly announced the decision to build Qinshan nuclear power plant, which has since opened the prelude to nuclear power construction. Since then, nuclear workers from the northwest and southwest have gathered at the foot of Qinshan Mountain, involving more than 100 scientific research units, 7 design institutions, 11 construction units and hundreds of manufacturing plants. Everyone has only one goal: to achieve a "zero breakthrough" in nuclear power. In March 1985, Qinshan Nuclear Power Station poured the first tank of concrete.
Everything is difficult before it is easy. The initial construction of Qinshan Nuclear Power Station is not smooth, and the first-hand information that can be used for reference is very limited. "Take the main pipeline connecting the steam generator and the pressure vessel as an example, there are as many as 16 welding joints. At that time, there was no such welding technology in China." Yuan Yong, the business manager of the Qinshan Nuclear Power Party Group Work Office of China National Nuclear Corporation, recalled, "I heard that a foreign-funded enterprise had mastered the relevant technology, and the technical experts of Qinshan Nuclear Power Station went to consult."
At first, the foreign-funded enterprise agreed to provide a welding technical manual at a price of $100,000. But later, with the approaching of the construction period, the government of the country where the enterprise is located put forward two "additional conditions": first, Chinese must report to the country for the use of this welding technology; Second, when using this technology to weld pipelines, experts from this country should be sent to supervise on the spot. Hearing these conditions, Zhao Hong, then general manager of Qinshan Nuclear Power Company, decided to terminate the negotiations. Later, we used this $100,000 to build a laboratory in Qinshan site, organized experts from Tsinghua University and other units to tackle key problems, and won this technology in half a year.
"To solve the technical key in self-design, only through our own research and development can we know what it is, know why it is, and master the technical initiative." Ouyang Yu, chief designer of Qinshan nuclear power plant project, said. During the construction of Qinshan Nuclear Power Station, every technical drawing was designed and drawn by Chinese himself. With a series of independent technologies, the design and construction project of Qinshan 300,000 kW nuclear power plant won the national special prize for scientific and technological progress.
There is a clock in the Nuclear Power Science and Technology Museum in Haiyan County, and the time on it is fixed at 0: 15 on December 15, 1991. This is a major breakthrough in the peaceful use of nuclear energy in China and a milestone in the second venture of the nuclear industry.
Since then, the development of Qinshan nuclear power has been accelerated, and the second, third and Fangjiashan nuclear power projects of Qinshan nuclear power have been completed one after another. In this process, China has mastered 300,000, 600,000 and 1 million kilowatts of nuclear power technology, and Qinshan nuclear power has become the epitome of nuclear power from scratch and from small to large. At the same time, Qinshan nuclear power has also taken the first step of "going out" of China’s nuclear power technology supporting services. On December 31st, 1991, China and Pakistan signed an agreement in Beijing to jointly build Pakistan’s Chashma nuclear power plant with Qinshan nuclear power plant as a reference. Chashma project was the first commercial nuclear power plant designed and built by China, and it was also the largest high-tech export project in China at that time.
Today, on the foothills directly opposite the Qinshan Phase I nuclear reactor, you can still see a stone tablet engraved with the four characters "Qinshan Chunxiao". "This is the way for China’s nuclear power workers to record history. Qinshan Nuclear Power Station is like a’ spring song’, and China’s nuclear power industry is welcoming spring." Huang Qian, Party Secretary and Chairman of Qinshan Nuclear Power of CNNC, said.
"Hualong No.1" leads China’s nuclear power technology level and comprehensive strength to rank among the first phalanx in the world.
On January 30, 2021, the third generation nuclear power technology independently developed by China and the world’s first "Hualong No.1" nuclear power unit-Fujian Fuqing Nuclear Power Unit 5 was put into commercial operation. From pouring the first tank of concrete on the nuclear island to commercial operation, "Hualong No.1" took only 68.7 months, making it the only third-generation nuclear power reactor in the world built on schedule.
"Hualong No.1" has realized the dreams of several generations of nuclear power workers, including Xing Ji, chief designer and chief expert of "Hualong No.1" of China National Nuclear Corporation. In the past 30 years, Xing Ji has participated in almost all nuclear power plant construction in China, which makes him have a deeper understanding of the importance and urgency of mastering key technologies: "In the late 1980s, when China built the first large-scale commercial nuclear power plant with a capacity of one million kilowatts on the mainland, not only the main equipment could not be provided domestically, but even the basic materials for nuclear power construction could not be supplied domestically, and reinforced concrete that met the requirements of nuclear power plants could only be imported. We are all eager to develop our own million kilowatt nuclear power technology. "
Nuclear power plant is the most complex energy system so far, and the first reactor of "Hualong No.1" involves more than 70 professional fields, more than 80 structures and more than 360 systems, with more than 200,000 engineering design drawings. Every detail innovation puts forward higher requirements for design, procurement, construction, commissioning, nuclear safety and other links. In order to achieve the overall upgrade, we must learn from experience and strengthen cooperation on a global scale.
At the beginning of the research and development of "Hualong No.1", Xing Ji led the large team of "Hualong No.1" to build an efficient collaborative innovation research and development platform of "globalization for Industry-University-Research", effectively integrating technical resources and realizing complementary advantages. On the basis of summarizing China’s experience in scientific research, design, construction and management of nuclear power for more than 30 years, Hualong-1, an independent third-generation nuclear power technology, has finally been formed, which integrates a number of major technical improvements, such as "the highest safety standard, 177 cores, double containment, active and passive safety systems, earthquake resistance and large aircraft impact resistance".
The research and development of core nuclear power involves 336 systems and 25 disciplines, and the calculation amount is beyond imagination; The steam generator has 5835 pipes, almost none of which are exactly the same, and it has to pass through 9 layers of support plates smoothly; The diameter of the dome is 46.8 meters, and the thickness of the steel lining is only 6 mm. When hoisting, it must accurately fall into the guide groove with a width of only 10 mm at the narrowest part at the top of the nuclear island … seemingly "impossible tasks" are placed in front of the "Hualong No.1" team.
The core is the most important thing in the design of nuclear power plants. In the 1990s, after the Qinshan Phase II nuclear power project of 600,000 kilowatts was independently developed and designed, China National Nuclear Corporation immediately started the research and development project of independent million-kilowatt nuclear power technology, and in 1996, it put forward the plan of 177 cores, which not only increased the power generation of nuclear power units by 5% to 10%, but also greatly enhanced the safety of nuclear power plants. This is the source of the birth of "Hualong No.1" and the basis of key technologies.
"The metal material wrapped in nuclear fuel is called zirconium alloy. When we first started research and development, there was no complete production line in China. " Jiao Yongjun, chief designer of CF fuel of CNNC, recalled. After more than ten years of technical research and thousands of experiments, researchers have finally successfully developed N36 zirconium alloy with independent intellectual property rights. Subsequently, the R&D team successively overcame a series of difficulties, such as critical heat flux test and in-reactor irradiation test, and CF series nuclear fuel elements realized autonomy and industrial application.
The steam generator of "Hualong No.1" is completely different from the previous one in terms of size, core components and even every weld. In order to solve the difficulties in design and manufacture, Zhang Fuyuan, chief designer of "Hualong No.1" steam generator of China National Nuclear Corporation, often travels between major manufacturing plants, and finally shortens the manufacturing cycle to 27 months; In the world’s first demonstration project site of "Hualong No.1", the dome hoisting is the most critical link in civil engineering. The construction team finally successfully completed the "blade docking" with rich experience and excellent technology …
The confirmation of group parameters, the manufacture of sets of equipment, the binding of steel bars, the adjustment of instruments and the input of lines of codes, from the top-level scheme, overall design and preliminary design to the relevant important experimental verification, the "Hualong No.1" team overcame one difficulty after another, and it took 16 years to carry out 54 scientific research projects and develop hundreds of sets of new equipment.
"Hualong No.1" has achieved a major breakthrough in all aspects, such as calculation and analysis software, reactor core design, fuel technology, active and passive safety technology, etc. It has mastered a large number of key technologies in the fields of independent intellectual property rights covering design, fuel, equipment, construction, operation and maintenance, formed its core competitiveness, and won the initiative for the future development of nuclear power in China.
From Qinshan to Fuqing, China’s nuclear power started from "one poor and two white" in technology to independently design and build a million kilowatt nuclear power plant, and its technical level and comprehensive strength rank among the first phalanx in the world. With the spirit of self-reliance and self-improvement, people in the nuclear industry have made unremitting efforts and taken another solid step towards building a nuclear power.
The Struggle Journey of China’s Nuclear Power Technology from Relatively Backward to Advanced in the World
From the first heavy water reactor and the first cyclotron to open a new era of China’s atomic energy industry, to the successful development of atomic bombs, hydrogen bombs and nuclear submarines to establish a great power status; From the independent design and construction of Qinshan Nuclear Power Station, "Hualong No.1" and other big countries’ heavy equipment, to the independent research and development of a number of advanced nuclear technologies such as medical cobalt-60 to promote the localization of high-end medical equipment, and then to the application of irradiation sterilization technology to help science and technology fight the epidemic … An overview of the development history of China’s nuclear industry is a struggle history with the primary task of meeting the national strategic needs and the strategic support of building an advanced nuclear technology industrial innovation system.
Under the strong leadership of the CPC Central Committee, from Qinshan Nuclear Power Station to "Hualong No.1", China’s nuclear industry has embarked on a road of development with China characteristics. One of the important experiences is to give full play to the advantages of the new national system. Taking the super project "Hualong No.1" as an example, 17 domestic universities, scientific research institutions, 58 state-owned enterprises and more than 140 private enterprises participated in the research and development; The world’s first reactor project has driven more than 5,300 upstream and downstream enterprises, realized the localization of 411 core equipment, promoted the development of the country’s high-end major equipment manufacturing industry and related service industries, and significantly promoted the processing technology and process level of dozens of industries such as materials, metallurgy, chemical industry, machinery, electronics and instrument manufacturing.
The development of the nuclear industry is inseparable from talents. In Qinshan Nuclear Power Station, a large number of outstanding scientific and technological talents have emerged, represented by Ouyang Yu, an academician of China Academy of Sciences, and Ye Qiqian, an academician of China Academy of Engineering. The first batch of 35 nuclear power operators in Chinese mainland was born here, and more than 2,500 nuclear power technical backbones were exported to the whole country. After the first phase of Qinshan nuclear power plant was put into operation, when other nuclear power plants in China started construction, the first thing that came to mind was "taking important people from Qinshan".
In recent years, CNNC has attached great importance to the construction of talent team and built an innovative highland for nuclear science and technology talents. Focusing on important scientific fields and innovative directions, we will cultivate a number of strategic scientific and technological talents, leading scientific and technological talents and innovative teams with international standards; Strengthen the training of young talents through elite, leading and innovative teams, train and train a group of young scientific and technological talents, and build a high-level talent channel; Further innovate the mechanism and actively introduce high-tech talents and innovative teams.
In 2021, Qinshan Nuclear Power Station ushered in the 30th anniversary of grid-connected power generation, and the first batch of "Hualong No.1" in the world successfully achieved commercial operation. The passage of 30 years reflects the struggle journey of China’s nuclear power technology from relatively backward to advanced in the world, and highlights the spirit of innovation and hard work of nuclear power workers in the new era.
"As the national team and main force of China’s nuclear science and technology innovation, China National Nuclear Corporation will follow the spirit of the important instructions of the Supreme Leader General Secretary, base itself on the new development stage, implement the new development concept, build a new development pattern, promote high-quality development, further improve the advanced nuclear science and technology innovation system, focus on tackling key technologies and transforming and industrializing achievements, continue to bravely break into the’ no man’s land’ and be a pathfinder, constantly climb the peak of world nuclear science and technology, and contribute to the early realization of high-level scientific and technological self-reliance." Yu Jianfeng, Party Secretary and Chairman of CNNC, said.
[Editor: Wen Cun]





