Abstract: In a power station installation which is designed as a combined installation, i.e. consists of a gas turbine group (2, 3, 4, 5, 6, 8) and of a steam cycle (13, 16, 17, 18, 19, 20) downstream of the gas turbine group, the steam rate being generated in a waste heat boiler (13) by heat exchange with the exit gases from the gas turbine (5), a heat exchanger (7), which is a component of a closed cycle, with a high-temperature reactor (12) as the heat source is placed downstream of the last compressor (4) of the gas turbine group and upstream of the combustion chamber (8). In this heat exchanger (7), the compressed air undergoes vigorous caloric processing before it flows into the downstream combustion chamber (8) in which the final caloric processing of the hot gases for charging the gas turbine (5) is accomplished. The essential point here is that the pollutant emissions of any type, in particular CO.sub.

Abstract: Test recovery of crude oil by injection of a heat carrier into the oil stum is effected by generating thermal energy in the crude oil deposit or at a location at which a well enters this deposit by carrying out a catalytic methanization reaction and transferring the resulting heat to the heat carrier which can be steam or an inert gas. The heat carrier then is introduced into the crude oil stratum and increases the mobility of the crude oil.

Abstract: A transitory or temporary storage for highly radioactive waste, in which the transitory storage incorporates containers for the receipt of the waste, and a cooling system for the discharge of the heat which is produced during the storage of the waste. The cooling system incorporates a cooling air duct, as well as a coolant circuit for a coolant which is conveyed in a closed circuit between coolant conduits which conduct off heat generated in the storage space and a heat sink arranged externally of the storage space.