France. Brest. Île Longue. From August 17 to 20, 2010. Ballistic nuclear missile-carrying submarine (SSBN) Le Terrible. Preparation of the vessel before its first mission.

In the nuclear boiler compartment the nuclear reactor of the submarine a highly protected compartment dedicated to the mini power plant. The plant generates 150 megawatts (one-tenth of the average nuclear plant) and provides for all the energy needs of the submarine.
An engineer inspects a facility located in the huge pipes of the secondary circuit of the nuclear reactor.