Transactions of Materials and Heat Treatment

Title：Development of nuclear power main-pipe manufacturing technology

Authors： Zhang Lei Feng Xiao Li Mingquan Wang Xin Lin Feng

Unit： Tsinghua University China 22MCC Group Corporation Ltd.

KeyWords： AP1000 thick-walled special pipe upset-extruding nuclear power main-pipe

ClassificationCode：TG376.3

year,vol(issue):pagenumber：2014,39(6):1-8

Abstract：

Nuclear power main-pipe is one of the key parts in nuclear island. The third generation nuclear power technique AP1000 developed by Westinghouse requires that the design lifetime of nuclear power main-pipe is 60 years, and no welding seam is allowed on the pipe body. Thus those conventional manufacturing techniques of nuclear power main-pipe face serious challenges. Currently, the method to manufacture AP1000 nuclear power main-pipe in Chinese industry is that the solid ingot casting is used to be initial billet, and then a solid spindle blank with both angled nozzle-like bosses is formed through free forging process, followed by machining performed to obtain the inner cavity of main-pipe, which is characterized by lower material utilization, longer production cycle and unstable quality of product. The history of nuclear power main-pipe manufacturing technology was reviewed. A new nuclear power main-pipe for AP1000 manufacturing technique based on upset-extruding technique was introduced. Numerical simulation analysis indicates that the new technique has advantages such as material saving, high-efficiency and better inner quality of product over conventional techniques for forming main-pipe.

Funds：

国家科技重大专项资助项目（2012ZX04010082）；国家高技术研究发展计划资助项目（863计划，2012AA040202）

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