Radioactive waste gas treatment system for offshore floating nuclear power platform

The invention discloses a radioactive waste gas treatment system for an offshore floating nuclear power platform. The platform comprises a buffer tank, a diaphragm compressor, a cooler, a gas-water separator, a decay box, an iodine adsorption purification unit, a fan and a chimney, wherein the inlet of the buffer tank is connected with a hydrogen-containing exhaust gas discharge pipe of an upstream system, the outlet is connected with the air inlet of the diaphragm compressor, and the gas discharge pipe of the diaphragm compressor is connected in series with the cooler and the gas-water separator sequentially; two ends of the diaphragm compressor and two ends of the cooling water pipe of the cooler are separately connected with the input pipe and output pipe of an equipment cooling water system, the gas discharge mouth of the gas-water separator is connected with the gas inlet of the decay box, and the gas discharge pipe of the decay box is connected with the iodine adsorption purification unit; and the rear