Recently, the good news from the CSIC the 725th research: the development of large seawater pipeline structure of titanium alloy stent, recently successfully applied in Zhejiang Sanmen Nuclear Power Plant project, which marks the world's most advanced nuclear power technology, AP1000 "the world's first reactor" with the "Luoyang titanium".
AP1000 non active pressurized water reactor nuclear power technology is the introduction, absorption and re innovation of the third generation nuclear power technology, and the Hualong one and CAP1400 and known as the leading China's future development of nuclear power nuclear power technology. In recent years, China has attached great importance to the development of the third generation nuclear power technology. In March this year, Premier Li Keqiang in the government work report lists over the past year in China in the field of science and technology reached the international advanced level of a number of innovative achievements when, first mentioned is the third generation nuclear power technology made significant progress.
At present, AP1000 is the only through the United States Nuclear Regulatory Commission approved the final design of the third generation of nuclear power technology, the industry is considered the world's most advanced third generation nuclear power technology. Has the world's first AP1000 nuclear power group Zhejiang three nuclear power station is known as the "world's first reactor technology". In May this year, the unit successfully completed the cold test, fully into the system phase.
As early as 2013, 725 on the construction of this project to track. In June this year, 725 in the project to understand the siphon transformation, the original design of the use of super dual phase steel material weight is heavy, poor corrosion performance and other issues.
It is understood that the use of nuclear power plant equipment, a large number of steel structure, a wide variety of complex shape. Although the steel structure material has the advantages of high strength, good seismic performance, construction period is short, but because of its anti-corrosion, anti rust ability is poor, for are mostly located in the humid coastal area, for structural safety requirements of high nuclear power plant, how to corrosion weight loss is a major problem.
To understand the problem, 725 day on the establishment of the project team, overtime is ready to prove data, the next day will send a representative to attend the China Nuclear Engineering Co., Ltd. and Shanghai Nuclear Engineering Design Institute site meetings, on the titanium alloy material properties, technology, economy and delivery were demonstrates one by one.
725 titanium alloy material has the advantages of low density, high strength, good corrosion resistance and so on. It is suitable for the special working environment of nuclear power plant. In the end, the 725 titanium alloy materials to replace the super dual phase steel material of the program has been approved by the expert group. In a short period of 20 days of delivery, the 725 delivered a total of 13.6 tons of titanium alloy products, for the next set of hot test provides a strong technical support.
In recent years, from the "Shenzhou" moon, "dragon" of the sea, to the "Snow Dragon" in Antarctica, with industry leading to titanium alloy, 725 Research Institute of titanium alloy products in the national key project eye-catching performance. The relevant responsible person said, the research and development of titanium alloy material replaced the original design of super duplex steel materials, to meet the resistance to corrosion and high reliability requirements, and at the same time, and achieved this, weight loss reduction effect, also for titanium alloy in the field of nuclear power application and innovation for seven hundred twenty-five in the field of nuclear power market development has set a benchmark.

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