Improved Nickel-based Alloy Cladding Technology of Tube Sheet for CPR1000 Steam Generator

The cladding with nickel-based alloys on steam generator tube sheet is the basic and key operation in the steam generator manufacturing processes.The cladding quality can affect the schedule and quality of follow-up operations directly.China Guangdong Nuclear CPR1000 project is the second generation nuclear power plant with the intellectual property of CNPEC.This article describes two mature technology concerning the steam generator tube sheet cladding of the CPR1000 nuclear power project in China.Based on above analysis,the improved technology is proposed.With the technology,the central region of tube sheet can be clad by automatic welding.