Patent Number: 048062774
Section: claims

1. A method of decontaminating solid surfaces which are contaminated by substances including radioactive materials, comprising the steps of immersing an object to be decontaminated in a liquid, maintaining said liquid at its saturation temperature or less, producing bubbles in said liquid by blowing vapor therein, and causing said bubbles to burst on a solid surface which is brought into contact with said liquid and which constitutes said object to be decontaminated so that substances adhered to said solid surface are separated and removed by means of an impulsive force produced when said bubbles burst. 2. A method of decontaminating solid surfaces according to claim 1, wherein said vapor is the vapor of a substance which is the same as said liquid. 3. A method of decontaminating solid surfaces according to claim 1, wherein said solid surface is a copper tube. 4. A method of decontaminating solid surfaces according to claim 1, wherein said solid surface is an inside surface of piping. 5. A method of decontaminating solid surfaces according to claim 1, wherein said solid surface is an inside surface of a bath. 6. A method of decontaminating solid surfaces according to claim 1, wherein said substances are soft and hard clads. 7. A method of decontaminating solid surfaces accoding to claim 1, wherein said hard clads are oxide films. 8. A method of decontaminating solid surfaces according to claim 1, wherein said solid surface remains in an installed condition during decontamination.