VENTILATION SYSTEM AND RELATED OPERATION METHOD FOR APPLICATION DURING A SERIOUS ACCIDENT AT A NUCLEAR-TECHNICAL ENTERPRISE

摘要

The ventilation system (2) for a production facility of a nuclear-technical installation accessible to personnel, in particular for paragraph (4) of the control at a nuclear power plant (6), should be provided in case of serious accidents involving release of radioactivity at least during the interval time of several hours; supply of purified fresh air. In particular, the content of radioactive inert gases in the fresh air entering the production area should be as low as possible. To this end, in accordance with the invention, the ventilation system (2) is equipped with a line (10) for supplying air through an external inlet (14) to the production room, which includes the first fan (12) and the first adsorption column (for example, 38) for noble gases by the line 44) discharging exhaust air through an external outlet (72) from the production area, which includes a second fan (46) and a second adsorption column (for example, 48) for noble gases, and switching means for changing the roles of the first and second adsorption columns (38, 48) for noble gases.