Transactions of Materials and Heat Treatment

Title：Process research and quality control on heat transfer tube in small-scale reactor once-through steam generator

Authors： Li Haitao Chen Yiwei Sun Haoming Wei Dong Zhang Yue

Unit： Nuclear and Radiation Safety Center Ministry of Ecology and Environment Shanghai Nuclear Engineering Research and Design Institute Co. Ltd.

KeyWords： once-through steam generator heat transfer tube cold rolling TT treatment bending pre-deformation non-destructive testing

ClassificationCode：TG376.3

year,vol(issue):pagenumber：2021,46(2):148-153

Abstract：

For small-scale reactor once-through steam generator (OTSG), the process of heat transfer tube was analyzed. In cold rolling, the designs on opening of groove, groove curve and matching deformation section and sizing section of head in the cold-rolled mold were optimized, and in TT treatment, the temperature was controlled at 715 ℃ and the holding time was more than 5 h to improve the resistance to intergranular corrosion. During bending, the anti-deformation method and the special mold design were adopted to determine the mold groove height of 9.91 mm and the anti-deformation amount of 0.09 mm so as to ensure that the bending radius and ovality, etc. were within the specified range. Through the above design on key processes, the surface quality, internal and external defects and physical and chemical properties of finished pipe were controlled layer by layer, and the final non-destructive testing, physical and chemical test and functional test were carried out to ensure that all performance indexes met the corresponding requirements.

Funds：

李海涛（1979-），男，硕士，高级工程师，E-mail：seawave008@163.com；通讯作者：张跃（1981-），男，硕士，高级工程师，E-mail:nsczhangyue@163.com

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