Shulou(Shulou.com)11/24 Report--

CTOnews.com December 4 news, according to China Nuclear Su Valve Science and Technology Co., Ltd., November 30, China's first batch of 3 domestic main steam isolation valves qualified, ready to be shipped to Hualong No. 1 batch demonstration project construction site, serving Zhangzhou nuclear power unit 1.

According to reports, as the key equipment of the main steam system of the nuclear power plant, the main steam isolation valve is mainly used to perform the safety isolation function of the containment and the steam generator. the valve is resistant to high temperature and high pressure, and the opening and closing thrust is extremely high. it is necessary to close quickly in a very short time under accident conditions, and its safe operation is very important for the power generation reliability of nuclear power plants.

As the core drive system of the main steam isolation valve, the gas-liquid drive device has complex functional logic and harsh operating conditions, and has high requirements for system, component and structure design, manufacturing, identification and so on. and related to hydraulic, pneumatic, mechanical, electrical and other multi-disciplinary fields, is a typical highly integrated and technology-intensive products. Prior to this, the equipment has long been dependent on imports, and foreign manufacturers are in a monopoly position, which is the "sticking neck" technology in the key equipment of nuclear power.

CTOnews.com learned that CNNC launched the Hualong No.1 main steam isolation valve drive project as early as 2019. After two years of painstaking efforts, a great deal of research has been carried out from the aspects of system design, calculation and simulation, structure design, manufacturing process, test technology and so on. the decomposition of sub-topics such as variable load control system, component level identification, simulation technology and hydraulic oil matching technology has been carried out, which has overcome many difficulties in design and manufacturing, conquered the core technology, and successfully completed the development goal of the project. The performance of the industrial prototype of the drive device and the linkage performance of the main steam valve fully meet the design requirements.

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