| 摘要 |
PROBLEM TO BE SOLVED: To recover residual water accumulated on a floor surface when a device is moved forward or backward and contaminated water after brush washing and to improve a decontamination effect by attaching a nozzle to a floor surface cleaning device in the floor surface decontamination of the D/S pool, cavity and large-sized tank of a nuclear power plant. SOLUTION: This nozzle is constituted of a flexible movable type squeegee 1a provided on the tip part center of the nozzle to be attached to the floor surface cleaning device and a fixed type squeegee 1b fixed through a spacer 1c on both outer side of it. When the floor surface cleaning device is moved forward or backward, the movable type squeegee 1a is bent in a direction opposite to an advancing direction and closes a gap with the fixed squeegee on the opposite side of the advancing direction together with a draining effect, and thus, the residual water on the side of the advancing direction is recovered.
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