Pilot operated safety valves for nuclear power plant regulators are essential to the safe operation of reactors and are recognized as the most difficult equipment to be domestically produced in nuclear-grade valves. On April 11, the prototype of “Hualong No. 1†regulator pilot safety valve independently developed by China Nuclear Power Research and Design Institute of China National Nuclear Corporation successfully completed the full-displacement thermal performance test, and the performance reached the latest technical requirements of the third generation of nuclear power. This means that China has successfully broken foreign monopolies, broke through key valve bottlenecks in nuclear power, and further enhanced the core competitiveness of “going globalâ€. At the acceptance and appraisal meeting on the same day, experts agreed that after the safety valve was successfully developed, it could not only realize the localization of the pilot-type safety valve of the primary circuit coolant system, but its core technology could be the waste heat removal system, chemical and volume control system. Provide technical support for the development of pilot-operated safety valves for other systems; pilot-operated safety valve technology can be widely used in third-generation nuclear power plants including "Hualong No. 1". It is understood that at present all the pilot-operated safety valves of regulators in all nuclear power plants in service and under construction in China rely on imports. Foreign countries also implement a ban on sales of regulator-operated pilot safety valves for the export projects of nuclear power plants in China. The “Hualong No. 1†regulator pilot-operated safety valve is a set of valve system composed of multiple valves such as pilot valve, main valve, solenoid valve and so on. At the beginning of the project, the R & D team determined that all technologies have independent intellectual property rights, and the goal of parts / components to achieve all independent supply, to ensure that the equipment is 100% localized and no longer subject to international competition. (Reporter Chen Yu) Pneumatic Telescopic Mast with power of air
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