Some nuclear equipment is required to be upended in the plants,the existing upending technology fails to fully meet the requirement of various projects,especially for large thin-walled vessels and special-shaped nuclear equipment.In this article,the frame-typed upending technology is summarized,and the method to design the frame-typed upending structure is pro-posed through the function analysis.The results are successfully applied to upend those large thin-walled vessels and special-shaped nuclear equipment,which provides technical reference for the design of upending frames of nuclear equipment in terms of engineering.
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