[China Instrument Network Instrument R&D] Since the program R&D was started in 2007 and the 2008 project has been officially implemented, CAP1400 has been the National Nuclear Power Technology Corporation (abbreviated as “National Nuclear Powerâ€) and the Shanghai Nuclear Engineering Research and Design Institute (abbreviated as “Shanghai Nuclear Industry Instituteâ€). ) The focus of work. At present, CAP1400 has successfully passed the review of the safety of the general reactors of the International Atomic Energy Agency. All six key tests of the major special projects have been completed. The acceptance of the projects has been promoted in an orderly manner. The construction design of the demonstration projects has been fully completed, and the autonomous design of equipment and localized manufacturing and innovation have been achieved. A series of results.
Recently, Zheng Mingguang, general planner and chief designer of the technological advancement, safety, and economy of the CAP1400 project, deputy general manager of the National Nuclear Power Technology Corporation, and president of the Shanghai Nuclear Engineering Research and Design Institute, said in an interview with a media reporter that the major projects During the 9 years of implementation and the entire development process of CAP1400, a complete technical system has been established and a relatively solid technical capacity has been accumulated. A series of CAP models has been gradually formed, completing a complete set of test equipment and equipment R&D and development. Out of their own design procedures, verification procedures, initially established a more complete security review system.
Media: How safe is the CAP1400?
Zheng Mingguang: The CAP1400 development is based on the AP1000, which strengthens the security design capability. Its security is in the world's leading position and reaches the highest security goal at present.
When carrying out the top-level design, the CAP1400 must meet the latest safety regulations and standards in China and the world, meet the most stringent environmental emission requirements, and meet the community's development requirements and public concerns in the future. The CAP1400 is resistant to commercial large-scale aircraft's malicious impact, anti-great flood, anti-storm storm, and anti-big-earthquake attacks, and has comprehensively enhanced the ability to cope with ultra-design basis accidents.
In terms of safety design, CAP1400 has thoroughly implemented the concept of safety in-depth defense, sufficient safety design margin, highly reliable nuclear power equipment, and simplified and human-oriented engineering system arrangements to ensure the safety of reactor facilities and radioactive barriers. The CAP1400 was fully designed and demonstrated at the same time as design innovations and improvements. The current safety design ensures that the environment, society, and the public will not be unacceptably harmed in the event of an abnormal event or even a serious accident.
Media: How economic and competitive is CAP1400?
Zheng Mingguang: On the premise of ensuring safety, economy is the most important factor in the construction of nuclear power plants. This is very important for the promotion and “going out†of CAP1400 in the country. Advanced concept, mature technology; reliable system equipment, simple layout; modular construction, short construction period, the first batch of the unit is expected to build a period of 56 months, the subsequent equipment manufacturing, project management model is mature, the batch unit construction period can be gradually shortened to 48 months; simple and flexible operation, less spare parts for safety equipment, and short maintenance inspection time, these characteristics determine the CAP1400's superior economy and competitiveness.
The key point is that through the implementation of major special projects, especially common technical research and the implementation of AP1000 technology introduction and support projects, the complete industrial chain of the third-generation nuclear power equipment with a competitive atmosphere can be effectively constructed, thereby comprehensively enhancing China’s nuclear power (60,1985). ) The overall competitiveness of equipment manufacturing and nuclear power technologies. Nuclear power is a national strategic industry that requires strategic cooperation and requires long-term strategic partners. National nuclear power has been cultivating three generations of nuclear power strategic alliances. On the one hand, in order to avoid monopolization, it is necessary to establish a number of manufacturing industries and their corresponding equipment manufacturing capabilities; on the other hand, we must try our best to avoid vicious competition in the market and make competition through sharing profit or interest. Orderly. In the process of localizing nuclear power equipment, we always uphold one principle: we must maintain a reasonable market competition.
At the same time, in order to ensure the mutual support between the design and the equipment, during the development process of the CAP1400, the design technology continuously promotes the capability of the equipment manufacturing plant and the development of the engineering prototype, so that the engineering design is completed during the same period. Engineering equipment, especially engineering prototypes It has basically matured to ensure the effective implementation of the design and effective implementation of the project.
Media: Is CAP1400 simple and simple?
Zheng Mingguang: A sentence is summarized: it is simple and not simple, simple and not simple. The safety system and equipment of the CAP1400 are simple, simple and reliable. Outstanding features include: small footprint, small workshops, less equipment, less welds in the main equipment, and less maintenance work. At the same time, the CAP1400 is not simple, it uses AP1000 advanced technology and advanced passive safety concepts. Based on AP1000's technology, CAP1400 further enhanced nuclear power safety and equipment design margin according to China's own requirements, making its overall technical level, safety level, and equipment manufacturing level a leading position in the world.
Media: What Tests CAP1400 Technology Has Withstood?
Zheng Mingguang: From the point of view of construction and operation, CAP1400 is relatively easy. CAP1400 follows the concept of three-generation nuclear power construction with standardized design, factory prefabrication and modular construction. It is easy to construct, install, and construct. At the same time, the design and manufacturing guarantees make CAP1400 friendly, flexible, and in-service inspections. The relatively small amount of features, with the ability to load changes and efficient human-machine interface. The development of the entire CAP1400 has withstood challenges from the perspectives of the country’s industrial system, intellectual property restrictions, design and equipment support, major technical challenges, and safety review.
The first is that the CAP1400 model research and development should be based on the "five based on", that is: based on China's 60-year nuclear industry system and R & D and design capabilities, based on China's equipment manufacturing system capacity, based on the country's 25-year nuclear power security, stable operation Experience, based on the introduction, digestion, and absorption of AP1000 advanced technology and passive concepts, based on the results of the development and reinvention of major special national mechanisms, it is not easy for this “five based†to form a synergy.
The second is the challenge of intellectual property. To achieve complete independent intellectual property rights, CAP1400 must achieve a net power of 1,350 megawatts, which is the bottom line requirement. In order to realize intellectual property rights and to break through relevant restrictions, CAP1400 must carry out model development, technical design, equipment development, experimental research and safety review on a high-level and autonomous basis on the basis of AP1000. This is also a comprehensive improvement of national capabilities. not easy.
Third, compared with the "second generation plus" technology, the third generation nuclear power materials and equipment have greatly changed and improved in terms of process requirements and manufacturing difficulty. In recent years, through the input of major special projects, through the introduction and absorption of technology, under the joint efforts of related nuclear power companies, universities, research institutes and equipment manufacturing industries in the country, we successfully completed the model test and research, and built a third-generation nuclear power industry chain.
Fourth, the CAP1400 has passed through and passed the largest and most profound safety review in the history of China. In addition to the PSAR review, it also includes six major project reviews, audit calculations, test verification, and independent verification. The CAP1400 safety review, which gathered national strength, and nearly 200 reviewing technical personnel participated, took more than 17 months, submitted more than 5,000 questions and answered them one by one to form a solution. The review requirements were reflected in the construction design.
Media: In addition to the CAP1400, are there other new models and products?
Zheng Mingguang: The CAP1400 is a self-developed model. As a platform, the Shanghai Nuclear Industry Institute has established a corresponding technical development system and model development technology capabilities. It can design and develop CAPs of various models and various power levels. At present, CAP1400, CAP1000, CAP50, CAP200, and CAP1700 are under development. In the future, if the international market needs, CAP600, CAP900 can be developed. These are the technical models developed on the platform of the CAP passive technology and can meet the needs of different owners and different markets at home and abroad. It can be said that the entire CAP series can meet the current social needs for the safe and efficient development and multi-level of nuclear power.
(Original title: Zheng Mingguang: Promote the manufacturing capacity of equipment by design)
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