The Korea JoongAng Daily reported the information.According to government officials, Russia likely transferred two to three modules for nuclear-powered submarines to North Korea in the first half of this year.These modules include a reactor, a turbine, and a cooling system—the main components of a nuclear power unit. This increases the likelihood that North Korea has received a complete power plant, including the reactor. Reportedly, these modules were not newly manufactured but were taken from decommissioned Russian submarines.“Since last year, North Korea has been persistently requesting nuclear submarine technology and advanced fighter jets from Russia. Russia was initially reluctant but appears to have agreed to provide them this year," a government source reported.North Korea considers the construction of nuclear-powered submarines a national priority, as possessing strategic nuclear submarines capable of striking the United States would complete the formation of its nuclear forces.On March 8, North Korea's state newspaper Rodong Sinmun published photographs of its leader Kim Jong Un inspecting what appeared to be a strategic nuclear-powered submarine under construction.Experts argue that North Korea lacks the technical capability to quickly build a nuclear-powered submarine, especially given that the submarine's reactor is its most critical component.Until now, North Korea has not been able to produce small reactors suitable for use on submarines.However, this assessment could change if the country has acquired Russian modules. By obtaining them, North Korea would gain access to reactor technology it could never have developed on its own.Pyongyang has been pressuring Moscow to provide such technology in exchange for sending its soldiers to support Russia's military actions in Ukraine.If Russia did indeed transfer these modules, it would mean Moscow has crossed a "red line," fundamentally undermining the Treaty on the Non-Proliferation of Nuclear Weapons (NPT). Such a move would almost certainly trigger additional international sanctions against both North Korea and Russia.The intelligence obtained by South Korea has been shared with the United States and allied countries.