[ Instrument Network Instrument Development ] On April 11th, the “Hualong No.1†regulator pilot-operated safety valve prototype independently developed by China Nuclear Power Research and Design Institute of China National Nuclear Corporation successfully completed the full-discharge thermal performance test and achieved performance. The latest technical requirements of the three generations of nuclear power, which means that China has successfully broken foreign monopolies, broke through the key bottlenecks of nuclear power, and further enhanced the core competitiveness of "going out".
Hualong No.1 is a three-generation million-kilowatt nuclear power technology jointly developed by China Guangdong Nuclear Power and China National Nuclear Corporation with China's independent intellectual property rights. It fully embodies the unity of the balance of safety and economy, the unity of advanced and mature, and the combination of active and passive. It is an independent three-generation nuclear power technology for sustainable development. It embodies the wisdom and hard work of China's nuclear power builders. It is expected to fill China's domestic technology gap in a short period of time and have the conditions to participate in international bidding.
However, due to the high technical difficulty and the small number of devices, the key valves of Hualong No. 1 nuclear power unit are slow to advance. Among them, the pilot-operated safety valve of nuclear power plant regulator is very important for the safe operation of the reactor. It is the most difficult equipment in the nuclear-grade valve. It is the most difficult equipment in the nuclear power plant. It is the pilot-operated safety valve of all nuclear power plants in service and under construction in China. All rely on imports, foreign countries for the nuclear power plant export project required for the regulator pilot safety valve also implemented a lock-up policy.
Starting from the height of ensuring the national nuclear power safety strategy and facing the international new economic environment, realizing the localization of the pilot-operated safety valve of the Hualong No. 1 nuclear power plant regulator is an important task that needs to be solved urgently.
At the beginning of the project, the R&D team determined that all technologies have independent intellectual property rights and zero parts/components to achieve full self-sufficiency, ensuring 100% localization of equipment and no longer being controlled by others in international competition. After more than 2 years of research In the research, China Nuclear Power Research and Design Institute independently developed a valve system consisting of a plurality of valves, such as a pilot valve, a main valve and a solenoid valve.
At the day of the acceptance meeting, the experts agreed that after the safety valve was successfully developed, not only could the first-stage safety valve of the first-line coolant system be localized, but the core technology could be the waste heat removal system, chemical and volume control system. Other systems use the development of pilot-operated safety valves to provide technical support; pilot-operated safety valve technology can be widely used in three generations of nuclear power plants including "Hualong No.1".
(Source: Sichuan Online, Science and Technology Daily, China Guangdong Nuclear Power Engineering Co., Ltd.)
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