Delta-IV ”Ryazan” to get service lifetime extension

Publish date: November 25, 2005

The nuclear submarine, Ryazan, has moored at the quayside of the Zvezdochka federal state unitary enterprise to enable work to be carried out to extend its service life.

As Interfax was told at the enterprise, work has started here to carry out the certification of the nuclear submarine, and the specifications of the repair work that Zvezdochka specialists are to carry out are being drawn up. The agency’s source recalled that the submarine came to prominence because of its participation in missile launches in the framework of international programmes.

The Ryazan strategic missile-carrying submarine cruiser belongs to Project 667 BDRM (Delfin, or Delta IV in NATO classification). The nuclear submarine has length of 167 m. and width of 12.2 m. Its maximum submersion depth is 400 metres, it has a draught of 8 m., speed of 14/24 knots and a crew of 130. The main power plant of the nuclear submarine includes two VM-4SG water-cooled reactors (90 MW each) and two OK-700A steam turbines. The nominal capacity of the main power plant is 60,000 hp. The nuclear submarine is armed with a D-9RM missile complex consisting of 16 three-stage liquid-fuel R-29RM missiles with a maximum range of 9,300 km. It is also fitted with the new TVR-671RTM missile-torpedo complex.

At the present time, Project 667 BDRM submarines are the main naval component of Russia’s strategic nuclear triad. They are all part of the Northern Fleet’s 3rd Strategic Submarine Flotilla and are based in Yagelnaya Bay.