CONAS drive
A CONAS drive (abbreviation for English combined nuclear and steam propulsion , dt .: "Combined nuclear and steam drive") is a marine propulsion concept is used in the nuclear and conventional steam generated for the drive.
When cruising , only the steam generated by nuclear reactors is used. Conventionally fired steam boilers are switched on to achieve maximum speed. Furthermore, if the nuclear reactors fail, the ship can only be propelled with conventionally generated steam.
The advantage of this configuration is the redundancy of the drive systems.
use
The only ships using this system are the Russian Kirov-class battlecruisers and the Kirov-class hull-based command and reconnaissance ship Ural (SSW-33) (Project 1941).
Only conventionally fired ships of the Kirow class can reach a maximum of 17 kn at a range of 1000 nm . Powered by nuclear power, they reach approx. 25 kn. When all steam generators are switched on, the maximum speed is 32 kn.