1. Secondary school and university years (1932-1942)
In his secondary school years, he actively participated in the commemorative activities of "May 30th" and "September 18th", and set the ambition of "not forgetting to study in order to save the country, studying in order to save the country". The school he attended was called "The School of the World," and it was called "The School of the World". The school he attended was called "Shiushi Middle School", which was the best school in Zhejiang Province at that time, with high level teachers and strict requirements for students. When he graduated from high school, Shanghai had already fallen, and in 1938 he was admitted to the Southwest United University in Kunming with honors.
He was the first student of the Southwest United University. Since the school had just moved to Kunming, conditions were poor, but there were many famous teachers. Among them were Wu Youxun, Zhao Zhongyao, Huo Bingquan, Rao Yutai, Ye Qisun and other older physicists. The first year in the Department of Mathematics, the second year transferred to the Department of Physics. At that time, there were not many people in the Physics Department, and there were only a dozen students in one grade, but the class was driven by students with outstanding natural talent (such as Chen-Ning Yang), and the whole level of learning was raised.
Four years of university life is very hard, but also very memorable. More than 40 students lived in a thatched hut, and there was no electric light at night, so they had to light oil lamps. The dining hall and library were in a large hut. 1939 Japanese planes bombed frequently, and everyone had to run to the mountains. In 1939, Japanese planes bombed frequently, so everyone had to run to the mountains. Although they were very tired, they insisted on concentrating on their studies. At that time, due to the transportation cut off, can not contact with the family, the economy has no source, can only rely on the war zone loan and scholarships, and sometimes to the secondary school as a substitute and tutor to support themselves. 1942, under the guidance of Wu Dayou, completed the thesis on the use of analytical mechanics to solve the problem of planetary motion in the celestial bodies.
2. From SWU to Tsinghua University (1942-1947)
After graduation, he stayed at the Physics Department of SWU as an assistant professor, and while working as an assistant professor, he followed some graduate courses. At that time, Wu Dayou taught quantum mechanics, Wang Zhuxi taught statistical mechanics, and Zhao Zhongyao, Zhang Wenyu, and Huo Bingquan taught atomic nuclear physics.
In 1946, I was given the opportunity to study abroad at the expense of the Chinese and British "Gengzi Reparations" programs. At that time, the examination was held in eight major cities in the country, and about 400 people applied for the physics major. Those who came in first or second place could go to England, those who came in third or fourth place to the United States, and those who came in fifth or sixth place to France. As a result, Dai Chuanzeng topped the list and was accepted to study in England. He left Kunming by truck and went back to his hometown Ningbo to visit his friends and relatives before the results were released. In his hometown, he received an invitation from Mr. Huo Bingquan and decided to go north to teach at Tsinghua University. When he passed through Tianjin, the list was released, and the good news of getting the first place made him very excited. During the war, Tsinghua University became a hospital for the Japanese sick and wounded, and the original teaching facilities were destroyed. He worked there for six months, and did two things: the first was to restore the physics laboratory; the second was to write an experimental textbook, but also organized the publication, which solved the urgent need for teaching at that time.
3. During his study in England
August 1947, he went to England to study at the University of Liverpool via Guangzhou. He had the honor of studying under the Nobel Prize winner Professor James Chadwick (James Chadwick, the discoverer of neutrons). Chadwick built a base in Liverpool with an 8 MeV cyclotron to carry out nuclear physics research. Dai Chuanzeng studied and did research work with his help. Dai Chuanzeng worked with his British classmate R. Middleton [who was later the director of the tandem gas pedal laboratory at the University of Pennsylvania] to do experimental research on the angular distribution of neutrons caused by deuteron bombardment of other atomic nuclei. Because of the high energy, the neutrons could reach several MeV, and the angular distribution was difficult to measure. The experiment was designed and organized by Dai Chuanzeng. They adopted the calculation scheme of the clipping reaction theory proposed by Kun Huang in the Liverpool Theory Group, and calculated the umbra and spin of many atomic nuclear energy levels. This work was one of the first results of the study of clipping reactions at the time.
He also studied the shrinkage factor and range correction of nuclear emulsion. 1951. Someinvestigation of nuclear reactions using photographic emulsion, with a study ofsome of its properties in nuclear reactions, was completed. study ofsome of its properties in nuclear reseach. for the Degree of Doctor inPhilosophy in the University of Liverpool.), was awarded the degree of Doctor of Philosophy.
Graduated from the Physics Department of the Southwest United University in 1942, he later served on the faculties of the Southwest United University, Sun Yat-sen University in Kunming, and Tsinghua University.
In 1951, he received the Doctor of Philosophy degree from the University of Liverpool, England.
Researcher and Honorary President of the China Academy of Atomic Energy Sciences. He is mainly engaged in analytical research in experimental nuclear physics, reactor physics, reactor engineering and nuclear power safety and has made significant achievements. He is a member of the Sixth National Committee of the Chinese People's Political Consultative Conference. He was one of the first scholars in the world to measure the spin metrics from (d,n) reactions, having consolidated the experimental studies on the angular distribution of deuterium-proton and deuterium-neutron nuclear reactions.
In the 1950s, he directed and participated in the development of neutron diffraction spectrometer and other instruments and carried out related research with it.
Since the 1960s, he has made a great deal of organizational leadership and operational guidance in the development of various instruments, such as large electromagnetic separators, and in the research of many key projects, such as nuclear submarine power reactors; he led the development of miniature reactors and the development of monocrystalline silicon neutron transmutation doping technology; he has made outstanding contributions to the establishment of China's nuclear safety research system; he was elected an academician of the Chinese Academy of Sciences in 1980, and is a member of the Academy of Sciences of China.
After returning to China, he successfully developed a variety of nuclear detectors such as halogen tubes, neutron counting tubes and neutron ionization chambers. In neutron physics research, he established the first neutron crystal spectrometer in China and obtained the first batch of neutron cross-section data in China. Among them, the halogen counting tube filled the gaps in the field of domestic nuclear detection technology and was awarded the Third Prize of Natural Science by the Chinese Academy of Sciences in 1956.
The Neutron Diffraction Spectrometer was successfully developed, reaching the international advanced level at that time. He also carried out research on monochromatic neutron utilization and neutron diffraction, and verified and obtained cross-section data for nuclear energy applications. Participated in leading shielding physics research, which provided the basis for nuclear reactor design. Chaired and directed the research and part of the design of production reactors, power reactors, high flux reactors and other projects. Organized and directed the development of civil micro reactors and single crystal silicon neutron doping research. At that time, the news of the domestic resistance to the U.S. and North Korea reached Britain, and several Chinese students were so encouraged that they were determined to return to China upon completion of their studies. Although some research organizations in the UK wanted to retain Dai Chuanzeng, he decided to return to China as soon as possible. At the end of that year, he arrived in Guangzhou via Hong Kong, where he visited an industrial exhibition, and then traveled north to Beijing via Shanghai. He was very touched by the fact that the director of the Institute of Modern Physics, Mr. Qian Sanqiang, personally came to the train station to greet him in the cold winter. From then on, the prelude to Dai Chuanzeng engaged in atomic energy research work.
4. During the period of the Institute of Modern Physics and the Institute of Atomic Energy (1952-1965)
Dai Chuanzeng came to the Institute of Modern Physics, and took over the nuclear detector group presided over by Mr. Qian Sanqiang, the director of the Institute of Modern Physics, and started to develop the first generation of nuclear detectors in China with hard work.
By the end of 1952, Dai Chuanzeng was the head of the nuclear detector group. At that time, he led most of the group were young people who had just graduated, in addition to specific guidance on the work, he also set up a weekly reporting and discussion system within the group, and fully carry forward the academic democracy, making the academic atmosphere very active. Under his leadership, the young people grew up very quickly.
Then the anti-U.S. aid to North Korea, Wang Kam-chang led a team to inspect the Korean battlefield, brought back a special task: proposed the development of a set of hand-carried radiation detector to detect, identify the U.S. military whether to use the atomic bomb. This task was given to Dai Chuanzeng. At that time, the laboratory conditions were extremely poor, everything had to start from scratch, but he gladly accepted this urgent task. He and Li Deping cooperation, due to simplicity, they rode their own bicycles to Tianqiao thrift stalls to buy parts and components can be used to lead the blowing of glass tubes, design electronic circuits, welding circuits, through a very short period of time overtime painstaking efforts, developed a halogen Geiger counting tube made of portable radiation detector and a strong current tube to do the detector. Halogen Geiger counting tube production process is also promoted to the East China Electronic Tube Factory mass production.
In order to develop neutron detection technology in China, the first step was to solve the problem of neutron sources. At that time, there was no gas pedal or reactor in China, what to do? They made their own neutron source. Dai Chuanzeng inquired about a discarded 500-milligram radium source at the Concordia Hospital, which had been destroyed and had been sealed after the war. Dai Chuanzeng received strong support from Yang Chengzong, a radiochemist, who cleaned and repaired the radium source device and extracted radon gas. Dai Chuanzeng sealed the beryllium powder he brought back from England into the glass tube together with the radon gas and made the radon-beryllium neutron source. From then on, the Radon-Beryllium Neutron Source became the only neutron source for neutron research work before the reactor and gas pedal were built. With the neutron source, under the leadership of Dai Chuanzeng, the research on boron trifluoride neutron counting tubes began. They started from scratch, and after an in-depth study of the discharge mechanism and working conditions of the boron trifluoride counting tube, they quickly passed the technical hurdle and made a neutron counting tube with excellent performance, and established a production process, which was popularized to the production of Shanghai Electron Tube Factory.
The successful development and mass production of the above counting tubes provided an indispensable means of measurement for China's geological exploration, teaching, armed defense and chemical defense forces, neutron physics experiments, nuclear weapons development and nuclear tests. This has laid the foundation for China's subsequent independent research and development of nuclear weapons and nuclear reactors.
Under the guidance of Dai Chuanzeng, he also carried out research on sodium iodide crystals and organic scintillation detectors, hydrogen-containing positive counting tubes, air-equivalent ionization chambers, boron membranes and fission ionization chambers, gridded ionization chambers, 4πβ-γ conformal technology for absolute measurements, and absolute measurements of neutron sources.
In order to carry out neutron physics research and slow neutron spectroscopy and solid state physics research on reactors, starting from 1956, under the leadership of Dai Chuanzeng, they designed a neutron crystal spectrometer by using the chassis of an anti-aircraft gun that they got from the army at that time, and in order to make it lighter and more accurate, they cooperated with Changchun Institute of Optical Machinery and it only took them 9 months to make China's first high precision neutron crystal spectrometer in China. This spectrometer was converted into a neutron diffractometer and put into use in 1960. It was the first neutron diffraction spectrometer in China, and also one of the most precise diffraction spectrometers in the socialist camp at that time. In July 1958, the first experimental heavy water reactor was built with assistance from the Soviet Union. In order to have a neutron spectrometer working on the horizontal aperture to detect neutrons and carry out slow neutron spectroscopy research before the reactor was started, Dai Chuanzeng proposed to design and manufacture a simple spectrometer by himself. He first found an old X diffractometer dial from the former Academia Sinica, from which he read degrees, minutes, and seconds, and designed around this dial. Under his leadership and specific guidance, a unique neutron crystal spectrometer was designed and built in just over four months. They also made a high-precision, very delicate collimator plugged into the reactor, measured the full neutron cross section of cadmium, indium and other nuclides, and the measured data were consistent with the internationally published data at that time.
The above two spectrometers reached the international advanced level at that time. Experimental studies of neutron energy spectrum, neutron full cross section and fission cross section, and neutron diffraction have been carried out on them successively. These two spectrometers have been used continuously and reliably for more than 20 years, and have played an important role in neutron physics and solid state physics research on reactors in China.
After 1959, the Sino-Soviet relations deteriorated and the Soviet experts were withdrawn one after another, leaving us with a lot of half-baked work. Like the stable isotope separator is an example, the Soviet Union did not bring the key ion source and receiver, but only gave us the large electromagnet and vacuum box, even the vacuum pump was not given. Dai Chuanzeng was temporarily appointed as the director of the newly established Stable Isotope Separation Laboratory to prepare for the construction of the electromagnetic separator. He led everyone to ponder over the drawings of the ion source and receiver in the literature one by one, such as what materials to use, how much high temperature to withstand, how thick the tungsten wire should be, and what kind of tungsten block was it, etc., and carried out solid development work. Later on, the comrades of the research laboratory spent more than a year on this basis, and finally got the ion source out. The same was done with the receiver. China's first stable isotopes were produced in 1965.
At that time, the Soviet reactor design experts had all withdrawn. At this critical moment, the leadership of the Second Engine Department decided to appoint Dai Chuanzeng as a scientific adviser on the construction of a natural uranium-graphite production reactor. This gave Dai Chuanzeng, a nuclear physicist, the opportunity to turn to the new field of reactor engineering to show his talents.
After Dai Chuanzeng became the scientific adviser for the production reactor, he took part in the process design, carefully digesting the preliminary design data from the former Soviet Union with the relevant comrades in charge of the project, verifying the data and selecting the process parameters together. After two or three years of work, the design made great progress. However, they found that they had no certainty about many data, and it was very difficult to select accurate process parameters, which required a lot of scientific research work. Therefore, the Ministry of Second Mechanism decided to set up the Institute of Reactor Engineering, i.e., Institute 194 in Beijing. 5. During the working period of Institute 194 (1965-1978)
After the establishment of Institute 194 in Beijing, Dai Chuanzeng was appointed as the deputy director of the Institute, and he was clearly divided into scientific research and academic leadership. The first thing Dai Chuanzeng did was to select the shell material for the production pile components. After a lot of tests, 303-1 aluminum alloy was selected as the casing material. At the same time, but also to solve the manufacturing process of cladding. He also personally did the performance test of graphite and proved that the graphite produced by China itself was qualified. In addition, he also caught a lot of scientific research work such as broken component testing, testing of components on the 49-2 swimming pool reactor, calculating the mechanical properties of several large systems, and measuring the critical properties by using the subcritical device, which provided a large amount of reliable experimental data for the design of the production reactor. In order to cooperate with the design and preparation of tritium targets, Dai Chuanzeng also led the irradiation of tritium targets in the reactor and the extraction of tritium targets after irradiation, which solved the problem of tritium target stereotyping.
The focus of his research work gradually shifted to nuclear power reactors. Among the key scientific research projects for the power reactor of China's first nuclear submarine, the most prominent was the fuel assembly test. Thirty assemblies were put through the high-temperature and high-pressure irradiation test circuit of the 101 heavy water reactor. Unfortunately, due to the process failure, there was an early failure of one of the plug weld joints, and fission products were found in the reactor water, so it did not reach the fuel consumption value required for the final test, and had to be taken out, cutting off the continuation of the test. The problems identified were later fed back to the component manufacturer, and improvements were made in the production process of the fuel assembly. Next, 10 rod bundles were successfully tested in the reactor, disassembled, and subjected to cosmetic and destructive inspections. Irradiation tests of 654-III steel, the pressure vessel material for nuclear submarine reactors, were also done, and it was found to have a relatively low brittle transition point, leading to the conclusion that it would not cause embrittlement under high-temperature conditions. In addition, simulated zero-power tests were done on the physical side, runner flow determination tests were done on the thermal side, and some control work was done, which made important contributions to the development of China's first nuclear submarine.
After 1968, Beijing Institute 194 put forward a big development program: firstly, to carry out research on nuclear power plants; secondly, to carry out preliminary research on fast reactors; and thirdly, to study space reactors. The research on nuclear power plants mainly centered on fuel elements. Dai Chuanzeng personally organized and implemented the first large-scale post-irradiation material inspection hot room (303 hot room) in China. In fast reactor research, Dai Chuanzeng, as the technical person in charge, established the sodium process research laboratories and the fast reactor zero-power device. In the research of space reactor, he sang the music of "The East is Red" by utilizing the electric current issued by the thermal ion power generation technology in the reactor. At the same time, with reference to foreign experience, he proposed to build a TRIG-type pulse reactor in China and led the conceptual design work, laying the foundation for the completion of the pulse reactor by the Chinese Nuclear Power Institute in the 1980s.
In the construction of the 303 hot chamber, the leaders and comrades who presided over the project at the beginning only considered the urgent needs of the recent engineering tasks and proposed a program of four hot chambers that only included mechanical performance inspection and appearance inspection. Dai Chuanzeng in charge of the business that since so much money to build a new hot room, there should be a plan, not only to meet the immediate needs of the project, but also should consider the long-term needs, especially in the future after China's irradiation of fuel components inspection needs. He personally researched and referred to similar hot room information abroad, proposed a hot room, including hot room, semi-hot room, after the area of strict partition, can adapt to the irradiated materials and fuel element inspection, more supportive and in line with the requirements of the protection of the 10 hot room program. Comrades who participated in the work at that time said: "This is something we do not even dare to think about, good is good, is afraid of the Ministry of leadership does not approve." Dai Chuanzeng told them that scientists should insist on seeking truth from facts, working according to the laws of science, doing their part, reflecting the needs to the leadership clearly, and going to fight for the leadership's support. He personally persuaded the leadership of the then MMC, and together with the leadership of the MMC, he persuaded the leadership of the Ministry, and finally got the support of the Ministry's leadership to realize the establishment of the program of 10 hot rooms. It is because of the construction of the 303 hot room for long-term considerations, hot room after the completion of not only completed the irradiation materials inspection and other urgent tasks, but also completed the production of the reactor, nuclear submarine pile components irradiation test test test after the completion of the Qinshan Nuclear Power Plant 3 × 3 test group of pieces of irradiation test after the completion of the test. 1995, and for the Qinshan Nuclear Power Plant reactor pressure shell steel with the test of the pile of the supervision of the tube samples began to carry out root-by-root inspection. Inspection. With a slight modification, the hot room was also able to carry out the inspection of single components of spent fuel at the Qinshan Nuclear Power Plant. Due to the strict separation of the 303 hot room, over the decades, the hot room work site has not been seriously contaminated. 303 hot room is still China's non-destructive testing of irradiated materials and fuel elements, destructive testing and mechanical testing of an important integrated test base.
Later, the focus was on the 49-3 high flux reactor. When the 49-2 pool reactor was built, some people put forward a more graphic expression, is "riding a donkey looking for a horse". 49-2 heap is a donkey, riding up to find a horse, the horse is a high flux pile. 49-2 heap was built, some people proposed to get a changeable, that is, according to the needs of the water heap, and sometimes into a beryllium reactor such a high flux pile. Dai Chuanzeng challenged this proposal. Dai Chuanzeng questioned this proposal. He believed that the reactor is very complex, the dose is very large, and can not be moved around like checkers, unless it is made into a dual-zone reactor. Later, after further demonstration, the dual-zone reactor scheme was accepted. During the design process of the 49-3 high flux reactor, Dai Chuanzeng organized and participated in the formulation of major technical proposals, the inspection of the work process, and the validation of safety measures. The purpose, scale, reactor type, and reactor physics scheme of the high flux reactor were all determined under his specific guidance. He also organized a great deal of scientific research work, such as fuel element tests, material tests, control rod tests, and hydrodynamic simulations, which provided a series of reliable bases for the design.
6. After returning to the Institute of Atomic Energy (Institute) (1978-1990)
In 1978, Beijing 194 moved to Sichuan. Dai Chuanzeng was invited by Wang Ganchang, director of the Institute of Atomic Energy, to return to the Institute of Atomic Energy as deputy director.
In 1979, with the reform and opening up of the country, Wang Ganchang, director of the Institute of Atomic Energy, led a delegation of Chinese nuclear energy to visit the United States. During the visit, Dai Chuanzeng, as a member of the delegation, saw at the University of Missouri (University of Missouri) the technology of neutron transmutation of phosphorus doping of monocrystalline silicon on their 5MW research reactor, which could irradiate and dope several tons of monocrystalline silicon every year and use it in high-power rectifier tubes. Dai Chuanzeng quickly realized that this is a very practical nuclear applications. In the past, single-crystal silicon doping are used in the diffusion method, the phosphorus atoms doped into the silicon single crystal, but uneven doping, it is difficult to achieve the expected target resistivity, the production of semiconductor devices yield is very low. The use of neutron transmutation doping released by the reactor, neutrons can be hit into the deep layers of single crystal silicon, so that the distribution of doped phosphorus atoms is very uniform, and can be doped with the appropriate amount of phosphorus according to the desired target resistivity control. Upon his return to China, he immediately conducted a serious feasibility analysis and formally proposed to carry out research on this brand-new topic. He personally identified staff, organized the development of the research program, guided the modification of the 49-2 swimming pool reactor, expanding the core, increasing the number of irradiation orifices, and using beryllium blocks instead of the surrounding graphite blocks to improve the amount of neutron irradiation. He also personally organized research to solve a series of technical problems such as how to control the irradiation amount and irradiation temperature, and how to anneal. A few months later, the first batch of China's neutron transmutation phosphorus-doped monocrystalline silicon was born, and was soon applied to the production of silicon controllable and high-power rectifier tubes, which not only greatly improved the yield of the devices, but also, more importantly, took an important step for the Atomic Energy Research Institute's military-to-civilian conversion. This achievement was honored with the second prize of Science and Technology Progress Award of the Ministry of Nuclear Industry.
In 1979, Dai Chuanzeng went to Canada to visit, see the University of Toronto (University of Toronto) developed a kind of reactor called Slow-poke, it is a small pile size, low power, with a certain neutron injection rate. It consumes little fuel and can last up to 10 years with one charge, making it very economical. Together with its inherent safety, it is very suitable for building in the city and can be used as a convenient tool for neutron activation analysis. It can also be used as a good instructional training reactor, and can also be used to produce short-lived isotopes. There was a proposal for such a reactor in the reactor physics room before he went abroad, and after he went abroad for a field trip, he thought it was worth doing. After returning to China, he approached Minister Zhang Chen of the Ministry of Nuclear Industry and strongly advocated the construction of such miniature neutron source reactors in China, which were economical, safe, easy to operate, and had a promising future for a wide range of applications. Dai Chuanzeng devoted a great deal of energy to leading the design and development of the reactor. He guided the demonstration of the physical scheme, personally organized and finalized the preliminary design and construction design, and finally built the prototype micro-reactor in March 1984, entirely by China's own strength. This achievement won the first prize of the 1987 National Science and Technology Progress Award. Now the micro-neutron source reactor has been commercially promoted, not only in the domestic Shanghai, Shandong, Shenzhen built three, and has been promoted to foreign countries, respectively, to help Pakistan, Iran, Ghana, Syria and Nigeria built a. The Miniature Neutron Source Reactor has become an important export project of the China National Nuclear Corporation (CNNC).
One day in February 1972, Dai Chuanzeng was invited to participate in a symposium on the development of nuclear power hosted by Premier Zhou Enlai, during which the Premier asked: "How is the development of nuclear energy in Britain today?" Dai Chuanzeng replied: "about 8% of the national energy." The Premier listened and emphasized: "China is a socialist country, should be developed faster than the United Kingdom, the Ministry of Second Machine to grasp nuclear energy, can not only become the Ministry of explosions." Premier in the symposium fully listened to the speeches, on China's development of nuclear power put forward the "safe, applicable, economic, self-reliance" policy.
Dai Chuanzeng, bearing in mind the Premier's mandate, after some serious research, from 1976 onwards, on many occasions through various channels to advocate the development of nuclear power in China. 1981, he analyzed China's nuclear science and technology strength in the CPPCC National Committee report, put forward the views of nuclear power should be developed as soon as possible as soon as possible in China. Starting from the analysis of China's energy structure and the development needs of the national economy, he published an article entitled "Development of Nuclear Power" in Guangming Daily, calling for and publicizing the early development of nuclear power in China. Since then, in the National Committee of the Chinese People's Political Consultative Conference (CPPCC), he has put forward a number of proposals, which have been emphasized by the CPC Central Committee and the State Council, and have greatly facilitated the start and development of nuclear power in China.
Dai Chuanzeng y realized from the experience of developing nuclear power abroad that safety must be put in the first place in order to develop nuclear power.
Dai Chuanzeng realized from overseas experience that safety must be given top priority in the development of nuclear power. Therefore, he personally led the Atomic Energy Research Institute to carry out experimental research on critical heat flux density, membrane boiling and re-flooding, which are closely related to nuclear power safety. 1979, he went to the United States to study on the third day of his visit to the United States just came across the accident of the Three Mile Island nuclear power plant in the United States. This incident stirred up the world, so that many people have doubts about the safety of nuclear power. This incident made Dai Chuanzeng more aware of the importance of nuclear power safety research. After he returned to China, he immediately shifted his focus to nuclear power safety analysis and research. He first wrote to a friend in Sweden to seek advice on the development of nuclear power safety research. The friend was very enthusiastic, said very supportive, and immediately sent him a thick International Atomic Energy Agency (IAEA) formulated safety regulations (NUSS) draft. Dai Chuanzeng immediately suggested that the Ministry to organize personnel to translate the NUSS system as the basic reference system for China's nuclear safety regulations. 1980 the end of the year he went to the U.S. Nuclear Regulatory Commission (NRC) to visit, and took the initiative to request the other side of the provision of nuclear power safety analysis procedures, through his efforts to ultimately from the U.S. departments to get the large-scale procedures RELAP5, FRAP-T, CONTEMPT and so on. Then he went to Oak Ridge and got some relevant safety analysis programs provided by the other party. At his suggestion, China participated in the Argonne Software Center (RadiationSafety Information Computational Center in Argonne National Laboratory), from which analysis software could be obtained cheaply every year. Through his efforts, a good relationship was established with the U.S. Nuclear Regulatory Commission. On this basis, he contacted the relevant parties and sent the technical backbone to NRC, IAEA and developed nuclear power countries for further study, and invited NRC and other experts to give lectures in China. These efforts laid an important foundation for conducting nuclear power safety research in China, including the establishment of China's nuclear safety regulations, nuclear safety review and nuclear safety management. He also did a great deal of work to prepare for the establishment of the National Nuclear Safety Administration (NNSA). During the construction of Qinshan Nuclear Power Plant, the State formed the NNSA, for which he immediately provided support in terms of talents and information, and he himself was invited to serve as an advisor. He also personally trained a number of master's and doctoral students in nuclear power accident analysis research, further experimental research on nuclear power safety, and research on cutting-edge topics such as probabilistic safety analysis, fuel element design procedures, and severe accident analysis. He supervised students to study the performance of Qinshan Nuclear Power Plant under accident conditions, and made constructive suggestions on the design and future operation of the plant, as well as important suggestions on the prevention and disposal of accidents. He participated in the review of the retrospective safety analysis report of Qinshan Nuclear Power Plant organized by the National Nuclear Safety Administration (NNSA). He also led the establishment of China's Nuclear Power Software Center to meet the needs of nuclear power development.
Dai Chuanzeng attended a special conference on fast reactors in India in 1985, where he gave a report on the development of nuclear energy in China (C.Z.Dai.1985. The Development of Nuclear Energy in China. Proc. Of Int. Symp. on Proc. Of Int. Symp. on FastReactors. Kalpakkam, India.).
After 1985, Dai Chuanzeng was invited to serve as a member of the International Nuclear Safety Advisory Group (INSAG) of the International Atomic Energy Agency for two terms. After the accident at the Chernobyl nuclear power plant in the former Soviet Union, he was involved in the analysis of the accident and, together with other members, carried out a source item study of it. While a member of INSAG, he was also involved in the development of the Basic Code for Nuclear Power Safety.
In October 1990, Dai Chuanzeng led a delegation to France on a scientific expedition to visit pressurized water reactor nuclear power plants and fast reactor nuclear power plants. On that occasion, there was no accompanying interpreter. Therefore, the leader, experts and interpreters were concentrated on him as a trinity. Due to overwork and climate discomfort, he fell ill and was hospitalized on his return to China. However, he did not alert anyone in the Atomic Energy Agency, and did not even realize the seriousness of his condition, thinking that he could be discharged after staying for a while. Because, he thought that after his return to China this time there are many things waiting for him to do.
On Nov. 11, 1990, Chen Shuping, director of the Atomic Energy Research Institute, visited him in the hospital. Though the disease was mercilessly eating away at his remaining energy, he was still in high spirits, urging Chen to boldly employ young people, do a good job of combining "scientific research" and "engineering", and improve China's experimental fast reactor. He also asked his daughter to take out the relevant materials for nuclear power safety analysis from the drawer, and asked Director Chen to pass them to the relevant researchers. When he learned that a groundbreaking ceremony for the fast reactor research center would soon be held at the Institute of Atomic Energy, he smiled with relief despite his illness.
On November 18, 1990, Dai Chuanzeng finally due to heart and kidney failure, with his dedication to the cause of nuclear power and the cause of nuclear science and deep attachment, passed away at the age of 69 years.