Nuclear instrument valve body 3D printing success

[China Instrument Network Instrument Development] According to China Guangdong Nuclear Power News, the Group recently used 3D printing technology to successfully print out the nuclear power plant complex flow meter valve body. This is the first application of 3D printing technology in China's nuclear power field. When the technology is mature, it means that the construction period of nuclear power projects will be greatly reduced, and the cost will decline.

3D printing technology, as a cutting-edge advanced intelligence-building technology, is a new type of industry that is currently highly concerned by all countries in the world and strongly promotes development. Among them, the development of metal 3D printing technology started from the 80's. Domestically, the technical team of Nanfeng Co., Ltd. cooperated with Professor Wang Huaming of Beijing University of Aeronautics and Astronautics to develop a heavy metal 3D printing technology and made breakthroughs in key technologies. In the laboratory, it successfully made physical and chemical properties better than forgings. Nuclear power components of heavy equipment metal parts.

On December 25, 2015, CNNC's China Nuclear Power Research and Design Institute and China National Nuclear Power Engineering Co., Ltd. signed a cooperation agreement for the research and development of nuclear power equipment 3D additive printing technology with Nanfeng Joint Subsidiary Nanfang Additive Technology Co., Ltd. respectively. The two sides jointly initiated the "Key metallurgical 3D printing technology research for nuclear power applications", aiming to use the most advanced 3D additive printing technology in the world to manufacture ACP100 multi-function modular small reactor pressure vessels and key equipment for nuclear power plants such as main steam super pipelines. In order to greatly improve the equipment manufacturing cycle and reduce equipment costs. In the first half of this year, the project has achieved the 3D printing of the CAP1400 autonomous fuel prototype assembly lower header.

The valve body of the complex flow channel instrument valve of the nuclear power plant that was successfully trial-produced recently uses SLM technology to scan the solidified metal powder layer-by-layer to gradually form the shape of the valve body and the internal flow path. The valve body is 140 mm long, 76 mm wide and 56 mm high. The material is Z2CND17-12 (316L stainless steel), a commonly used material for nuclear power. It is reported that it has been confirmed that the chemical composition and basic mechanical properties of the valve body material meet the requirements of the international nuclear power standard RCC-M, and is a major milestone.

The successful trial production of the valve body not only achieved a breakthrough of “zero” in the field of nuclear power generation for metal 3D printed manufacturing components, but also laid the foundation for the subsequent establishment of a joint R&D center for nuclear power metal 3D printing by China Guangdong Nuclear Power and established a benchmark for nuclear power metal 3D printing applications. Leading the development of China's nuclear power industry.

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