Online dry ice decontamination device and method for radioactive surface decontamination

The invention discloses an online dry ice decontamination device and method for radioactive surface decontamination. The device comprises a a dry ice system and an air compression system which are connected through a pipeline; the dry ice system comprises a carbon dioxide Dewar flask, a dry ice maker, a dry ice incubator and a dry ice cleaning machine which are integrally installed on a platform trolley I; the carbon dioxide Dewar flask is connected with a feeding inlet of the dry ice maker; the air compression system comprises an air compressor, an air storage tank, a C-class filter, a dryer,a T-class filter and an A-class filter which are sequentially connected through a pipe and integrally installed on a platform trolley II. The device is the integrated and movable online decontamination device. In the method, the air compression system provides power for the dry ice system, dry ice particles are sprayed out and used for online decontamination, no secondary waste is generated in the decontamination process