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Chaijima nuclear power steam generator tube plate deep hole processing is currently the most difficult to overcome in the production of nuclear power projects in China: First, the tube plate assembly structure is relatively special, put forward stricter requirements on the precision of drilling equipment; The dimensional tolerances of the drilled holes are strict. In the past few months of research, Haguo carried out a large number of process tests, constantly adjusting equipment parameters, configuring auxiliary tooling, exploring process parameters, finally finalizing the drilling process plan, and passing the inspection of the owner, began the formal drilling. Hole work.
It has produced the Ha-pot of two steam generators in Chashma, Pakistan, and regards this manufacturing as the No. 1 project of Tianzi, and strives to create high-quality products that meet the nuclear safety level and quality assurance level. In order to ensure the quality of nuclear power tube drilling, Harbin strengthened personnel technical training, carried out nuclear safety culture education for all employees, raised the awareness of nuclear power of all employees, and formulated strict nuclear power product tube plate drilling operation procedures, requiring each drill A hole must stop to be inspected, and then continue to work after it is correct; strictly follow the "four things" to organize production, that is, there are rules to follow, everything is responsible, everything is well documented, and everything is supervised. The entire production process is fine and closed, ensuring the safety of nuclear power products. At present, Haguo has successfully obtained the ASME nuclear power product authorization certificate.
It took 125 days to successfully complete the deep hole processing of the tube plates of two steam generators, which marked that the pot has cracked the nuclear power production difficulties and the nuclear power manufacturing capacity has leapt to a new level.
For the first time, the production of nuclear steam generators was completed with high quality, and the pots were highly praised by experts in the industry. A senior expert from China Zhongyuan Foreign Engineering Co., Ltd., who has supervised steam generators in France, Japan and the former Soviet Union, believes that among the products he supervised, the quality of the deep hole processing of the tube plate of the Haguo pot is the best. At the same time, CNNC and Guangzhou Nuclear Power Group fully affirmed the deep hole processing capability and technical level of the tube plate of Haguo.
At present, the production progress of Harbin nuclear power production has made a comprehensive breakthrough. The first steam generator tube that has been completed--the tube-plate welding process not only marks the welding of the pipe and tube plate in the process technology, but also marks the difficulty. The pipe-passing process has also been successfully completed.
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Haguo to overcome nuclear power steam generator tube plate drilling difficulties
Recently, Harbin Boiler Factory Co., Ltd. successfully completed the deep hole processing of the 300,000 kW nuclear power steam generator tube plate in Chashma, Pakistan. Its aperture is 100% qualified, and the parameters such as hole pitch, hole verticality and hole wall finish are all achieved. High level, fully meet the manufacturing requirements of steam generators. This shows that the manufacturing capacity and technology of the Haguo nuclear steam generator have reached the domestic advanced level.