Kim’s calculations
The nuclear test was the culmination of policy developments beginning in late 2005. For nearly a year, the North had boycotted the Six-Party Talks, the episodic diplomatic forum in Beijing focused on achieving a negotiated solution to the nuclear impasse. In mid-September 2005, all six participating states signed a document calling for the denuclearisation of the peninsula, but the agreement unravelled barely before the ink was dry. Washington shortly thereafter succeeded in freezing North Korean assets at a bank in Macao, which the US contended was a primary conduit for Pyongyang’s trafficking in counterfeit currency. The North insisted that it would not return to the Six-Party Talks until US financial sanctions were lifted, but American officials consistently rejected these appeals. Pyongyang also failed repeatedly to induce the United States to enter into bilateral negotiations. Pyongyang decided to escalate, undertaking seven ballistic missile tests in a nine-hour period on 5 July 2006. Ten days later, the Security Council passed a unanimous resolution condemning the tests that also sought to prevent any transactions related to missiles and WMD development. North Korean pronouncements in the wake of the resolution warned elliptically but unmistakably that a nuclear test had become a question of when, not if.
Kim Jong Il, the North’s mercurial leader, apparently concluded that he had little to lose in undertaking a nuclear test. But it is less evident what he thought he would gain. Kim was clearly offended by the open opposition of China and Russia to the missile tests, and by their readiness to cooperate with the US and Japan on passage of the resolution. However, he may have concluded that the opprobrium of the international community strengthened his power position within North Korea, while reaffirming his close ties to North Korea’s military leadership. Kim was evidently convinced that the viability of the North Korean system could only be guaranteed through its ‘military first’ policy, and that there was little that any external power could do to prevent a detonation. The North’s announcement of 3 October, declaring its intention to test imminently, bore unmistakable similarity in tone and argument to China’s October 1964 defence of its first nuclear detonation, an irony that was not lost on China’s leaders.
Kim’s defiance of China spoke volumes about his determination to reject all appeals for restraint, no matter what the apparent risks and consequences. Chinese sources confirm that North Korea informed Beijing 20 minutes in advance of the test, enabling China to notify other governments. But this offered little solace to Chinese officials, who were deeply angered by Kim’s actions, and by the major setback to China’s efforts to fashion a multilateral settlement. During the visit by State Councilor Tang Jiaxuan to Pyongyang ten days after the nuclear detonation, Kim purportedly informed Tang that he had ‘no plan’ for a second test, but he also argued that the North’s future actions would be contingent on the policies of others, especially the US. Immediately upon his return to Beijing, Tang met with visiting US Secretary of State Condoleezza Rice. China then orchestrated the renewed contact between the lead negotiators in the Six-Party Talks and the agreement to resume talks, either later this year or early in 2007. Beijing also believed that it had been able to slow any possible movement towards a second test. North Korea consented to renewed negotiations on the premise that the talks would focus primarily on the lifting of US financial sanctions. The lead American negotiator, Assistant Secretary of State Christopher Hill, made clear that the US expects ‘substantial progress’ in Pyongyang fulfilling its denuclearisation pledges of September 2005. Meeting the expectations of either side will be a highly daunting task, and few observers anticipate significant progress, let alone a major breakthrough.
Test results
Kim may have undertaken the nuclear test in accordance with his own needs and timetable, but the technical results were far from optimal. North Korea purportedly informed China that the anticipated yield from the test would be approximately four kilotons, i.e. 4,000 tons of TNT equivalent. A test of this magnitude, though smaller than the explosive power in the first tests of other new nuclear entrants, would have represented a significant achievement. However, following analysis of radioactive debris, the Office of the US Director of National Intelligence announced that the explosive yield was ‘less than a kiloton’; additional official disclosures and private estimates estimated the yield as low as 200 tons of TNT equivalent. US intelligence sources also disclosed that the fissile material used in the test was plutonium reprocessed from spent fuel removed from the North’s reactor at Yongbyon, not highly enriched uranium. The test was not an outright failure, but it was far from a full success. Various explanations have been offered of what went wrong, including possible impurities in the plutonium, problems with the sequencing of the detonators resulting in incomplete implosion of the plutonium core, and other technical or material shortcomings. This suggests that Pyongyang might feel compelled to test again, perhaps more for technical than political reasons. But a future test or tests would risk comparably indeterminate results and greater international condemnation, while also consuming additional portions of the North’s limited plutonium inventory. Amidst Pyongyang’s bravado, the options to enhance its incomplete deterrent remain inauspicious.