FORFARANDE FOR RENGORING UNDER DRIFT MED HŸ2O RESP DŸ2O FUKTADE DELAR AV KERNKRAFTSANLEGGNINGAR

摘要

Cleaning of components of nuclear reactor power plants as for example steam generators, by blasting the contaminated surface with boron trioxide sand propelled by compressed gas, withdrawing the gas containing suspended boron trioxide particles and abraded solid particles from the atmosphere around the treating area and passing the gas containing suspended particles through a vortex separator to separate the particles from the gas. The gas after removal of the particles may be returned to the chamber enclosing the surfaces to be cleaned thereby minimizing contamination in the area surrounding the enclosed chamber.