Ventilation system for use in severe accidents in nuclear facilities and method of operation thereof

摘要

Ventilation system (2) for operator cabs in nuclear installations, especially the control room (4) of nuclear power plants (6), is decontaminated for at least several hours during severe accidents where radiation is emitted It must be possible to provide a fresh air supply. In particular, in this case, it is necessary to reduce as much as possible the radioactive noble gas components in the fresh air introduced into the cab. For this reason, in the ventilation system (2) according to the present invention, the first blower (12) and the first rare gas adsorption tower (for example, 38) are connected to the vent pipe (10) that leads from the external inlet (14) to the cab. The second blower (46) and the second rare gas adsorption tower (for example, 48) are connected to the exhaust pipe (44) leading from the cab to the external outlet (72), and the first and second rare gases are connected. Switching means for exchanging the roles of the adsorption towers (38, 48) is provided. [Selection] Figure 1