This paper analyzes the typical welding technical problems in the design and construction process of VVER PWR nuclear power plant from China to Russia

and puts forward the process and measures to solve the problems of uncertain classification of materials supplied by Russia

materials supplied by China

materials and base metals from the third country

which cannot determine the welding process materials for evaluation. The process and measures for assessing problems

providing solutions and experience feedback for the treatment of defects in equipment and materials in the welding process in Russia

and suggestions for rectification of difficult construction techniques that lack welding processes and welding qualifications

and effectively implemented rectification methods can promote Sino-Russian technology conversion and the progress of project construction.