Firefighters have reportedly put out a blaze on a Russian nuclear submarine which was undergoing repairs at a northern shipyard.<br /><br /> The state-owned management said there were no weapons on board and the vessel’s nuclear reactor had been shut down before the fire took hold.<br /><br /> The corporation said there was no threat of environmental or radioactive contamination.<br /><br /> The dry dock at the Zvyozdochka shipyard in Severodvinsk was flooded with water to partially submerge the submarine and help put out the fire.<br /><br /> It is said to have started near the stern during welding work that caused insulation materials to be set alight.<br /><br /> Russia’s nuclear submarine fleet has been involved in a series of accidents in recent years, and the authorities accused of hiding information.<br /><br /> In the worst disaster, in 2000, a nuclear submarine in the Murmansk region sank with the loss of 118 lives. The navy was criticised by Russia’s political leaders for hiding information.<br /><br /> In September 2013 a fire at Vladivostock
