Method for recovering at least one fuel assembly which has remained engaged below an upper plate of a core of a pressurized water nuclear reactor

摘要

The method involves securing and maintaining a prismatic fuel assembly (7a) under water, after detecting the presence of the assembly during lifting of upper internal equipments (4) of a pressurized water nuclear reactor. The assembly is decoupled from an upper core plate (4a) in a remote manner. The equipments are transferred and installed on a receiving stand arranged in a water tank (16). A damaged fuel assembly is discharged towards a storage zone for being arranged in a receiving device (15). Securing tools (20) are discharged after being separated from the assembly.