Process for treating waste gases from a reactor equipment

Object: To prevent discharge of waste gases having a high radioactivity density into atmosphere at the time of failure or damages of machineries, piping and seals in valves or the like. Structure: Hydrogen and stream contained in waste gases from a turbine condenser are removed by a re-coupler unit, cooler and water-gas separator, and radioactive substances are attenuated and removed by a delay pipe and filter, after which water and carbon dioxide gas are removed by a water-carbon dioxide gas remover unit and cooled by a heat exchanger, and thereafter introduced into a rectification tower. A vacuum pump is installed on the purifying gas line at the outlet of the heat exchanger, whereby process for adsorbing and removing water and carbon dioxide gas and process for rectifying and separating the radioactive rare gas are accomplished under negative pressures. A heater is installed on the liquid taking-out line from the bottom of the rectification tower to heat and vaporize the taken out liquid by means of a heater, after which the liquid is returned to inlet of an air extractor and the impurities are removed by the re-coupler. (Kamimura, M.)