FACTBOX: North Korea's Yongbyon nuclear complex

(Reuters) - North Korea has removed U.N. nuclear watchdog monitors, seals and cameras from its shutdown atomic bomb-producing complex and aims to reintroduce nuclear material there in a week, officials said on Wednesday. North Korea had said on Friday it was working to reactivate the Yongbyon reactor complex, which it had been dismantling since last November under a disarmament-for-aid deal that has gone awry. Following are some facts about the Soviet-era Yongbyon complex, the nuclear research and production center of the Democratic People's Republic of Korea (DPRK). * LOCATION -- Yongbyon is named after a county in North Pyongan province. The complex is about 100 km (60 miles) north of Pyongyang and is built in a clearing amid rugged mountain ranges. * THE FACILITIES -- The complex consists of a five-megawatt reactor, whose construction began in 1980, a fuel fabrication facility and a plutonium reprocessing plant, where weapons-grade material could be extracted from spent fuel rods. -- The site also contains a 50-megawatt reactor whose construction was suspended under a 1994 nuclear deal with the United States. The reactor is nowhere near completion. * ESCALATION OF TENSION -- In February 2005, North Korea declared for the first time that it had nuclear weapons. It conducted its first nuclear test with a plutonium-based device in October 2006. * DISABLEMENT -- U.S. technicians began taking apart the three main working facilities at Yongbyon in November 2007. North Korea said the toppling of the reactor's cooling tower in June was a demonstration of its commitment to the nuclear deal. * THE TALLY -- U.S. officials said the North has produced about 50 kg (110 lb) of plutonium, which proliferation experts said would be enough for six to eight nuclear weapons. Sources: Reuters, Center for Nonproliferation Studies, intelligence reports, Congressional Research Service, South Korean Foreign Ministry) ʘ