This process has been used on both pressurized water reactors (PWR) and boiling water reactors (BWR).
Typically, the gross activity is flushed to a low point or lower cavity using hoses (fire and garden varieties), water brooms, and squeegees. The area is then cleaned using scrub brushes on a handle, mops, and commercial floor buffers. Walls are decontaminated using scrub brushes or pads to a predetermined height that varies from 6 to 8 feet from the floor to the entire wall and fixtures. Person-baskets suspended from overhead cranes are the most frequently used device for high vertical surfaces.