North Korea’s pursuit of uranium enrichment should not, and has not, come as a surprise. The pre-eminence of Juche, the political thesis of Kim Il Sung, stresses independence from great powers, a strong military posture, and reliance on national resources. Faced with an impoverished economy, political isolation from the world, and rich uranium deposits, nuclear power—both civilian as well as military—fulfills all three purposes.
History and hindsight have shown a consistency in North Korea’s efforts to develop its own nuclear capability. One of the first steps North Korea took was to assemble a strong national cadre of nuclear technicians and scientists. In 1955, North Korea established its Atomic Energy Research Institute. In 1959, it signed an agreement with the Soviet Union to train North Korean personnel in nuclear related disciplines. The Soviets also helped the North Koreans establish a nuclear research center and built a 2 MW IRT nuclear research reactor at Yongbyon, which began operation in 1969.
Throughout the 1970s, North Korea continued to develop its nuclear capabilities, pursuing a dual track approach that was consistent with the idea of nuclear self-reliance. While engaging in discussions to obtain Light Water Reactors (LWRs) from the Soviet Union, North Korea proceeded with parallel studies on graphite moderated gas cooled reactors, using publicly available information based on the Magnox reactor design. North Korea also carried out plutonium separation experiments at its Isotope Production Laboratory (IPL), and successfully separated plutonium in the same decade. The North Koreans worked on the design of a reprocessing plant for which, the chemical process was modeled after the Eurochemic plant. When negotiations to acquire four LWRs from the Soviet Union failed, North Korea had already embarked on its indigenous nuclear program. Throughout the 1980s, North Korea constructed a 5MWe reactor, fuel fabrication plant, and a reprocessing plant at Yongbyon, with no known documented external help and with minimal foreign equipment procured. When the joint statement on the Denuclearization of the Korean Peninsula was concluded in December 1991, all three facilities had been fully operational for a number of years, with two additional (50 MWe and 200 MWe) graphite moderated gas cooled reactors under construction.
The Enrichment Route
North Korea’s closed society and isolationist position has made it immensely difficult to accurately gauge its nuclear activities. Pyongyang has gone to great lengths to hide much of its nuclear program, including its enrichment route. Nevertheless, there have been indications, including procurement related evidence, that point in the direction that North Korea has been actively pursuing enrichment since the mid-1990s, with likely exploratory attempts made up to a decade earlier.
It is clear that North Korea received a key boost in its uranium enrichment capability from Pakistan through the A.Q. Khan network. Deliveries of P-1 and P-2 centrifuges, special oils, and other equipment from Pakistan to North Korea in the late 1990s were acknowledged by former Pakistani President General P. Musharraf in his memoirs, “In the Line of Fire.” President Musharraf also wrote that, separately, North Korean engineers were provided training at A.Q. Khan’s Research Laboratories in Kahuta under the auspices of a government-to-government deal on missile technology that had been established in 1994. In all likelihood, North Korea also received the blue prints for centrifuges and other related process equipment from the Khan network during that period of time.
In the late 1980s, North Korea acquired vacuum equipment from a German company. While such equipment was primarily meant for North Korea’s fuel fabrication plant then under construction, some of the vacuum pumps could have been used for enrichment experiments. But additional attempts made in 2002 to again acquire vacuum technology after the completion of the fuel fabrication plant strongly pointed to its use for enrichment purposes. Evidence of Nor