Research on underwater partial dry welding repair technology for spent fuel pool

Currently, both during the construction and operation phases of domestic nuclear power plants, welding repairs for defects in stainless steel water pools are carried out in a dry environment. However, creating a dry environment requires a significant amount of time and manpower, and becomes even more challenging after the nuclear power plant has been in operation for a long time. This article, based on underwater partial dry methods, has developed a set of equipment that can achieve underwater transportation + underwater partial dry welding. Welding repairs for defects on the surface of stainless steel in the spent fuel pool are completed using the plate patch method.This provides a technical foundation for the underwater wall defect repair of spent fuel pools in nuclear power plants.