North Korean nuclear weapons program
When did North Korea conduct its first nuclear test?
What is the status of North Korea’s nuclear weapons program?
Why does North Korea prioritize its nuclear weapons program?
What is the Yongbyon Nuclear Scientific Research Center?
How has North Korea’s ballistic missile testing evolved over time?
North Korea’s nuclear weapons program is a longstanding challenge to global security. The Kim regime—North Korea’s authoritarian ruling dynasty founded by Kim Il-Sung and now led by his grandson Kim Jong-Un—has made nuclear weapons a national priority, viewing them as a deterrent against foreign intervention and a guarantee of regime survival. Since conducting its first nuclear test in 2006, North Korea has developed a growing arsenal of nuclear devices and increasingly sophisticated ballistic missiles, including intercontinental ballistic missiles (ICBMs) theoretically capable of reaching the continental United States.
Origins and epicenter
North Korea’s nuclear program began during the Cold War. During the 1950s and 1960s, the Soviet Union assisted North Korea in developing nuclear research facilities and training scientists. By the 1980s North Korea had established a major nuclear complex at Yongbyon, about 60 miles (100 km) north of Pyongyang.
Known as the Yongbyon Nuclear Scientific Research Center, the complex became the center of North Korea’s plutonium-production effort and remains the country’s most important known nuclear site. Its facilities include a five-megawatt reactor used to produce plutonium, a radiochemical laboratory for reprocessing spent fuel, and a uranium-enrichment plant that provides a parallel pathway to weapons-grade material.
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During the 1990s and early 2000s, disputes over inspections and sanctions increasingly brought North Korea’s nuclear activities to international attention. While diplomatic agreements periodically slowed the program, Pyongyang repeatedly resumed nuclear development, citing security concerns and the need to deter foreign threats.
Nuclear tests
North Korea has conducted six acknowledged underground nuclear tests, all at the Punggye-ri Nuclear Test Site in the country’s northeast. Each test demonstrated increasing technical sophistication and explosive yield.
| date | result | description |
|---|---|---|
| October 9, 2006 | Partial success | North Korea’s first underground nuclear test. Although the device yielded less than two kilotons and was only partially successful, it demonstrated that the regime had acquired nuclear capability. |
| May 25, 2009 | Success | A more powerful test with an estimated yield of roughly 2–6 kilotons, demonstrating improved weapon engineering and design. |
| February 12, 2013 | Success | With a yield roughly double that of the 2009 test, this was the first nuclear test conducted under Kim Jong-Un. |
| January 6, 2016 | Success | North Korea claimed this test was a thermonuclear weapon (a hydrogen bomb), although most experts concluded that the yield was too small for a true thermonuclear weapon and more consistent with a boosted-fission device. |
| September 9, 2016 | Success | With a yield of over 10 kilotons, this test demonstrated the regime’s growing nuclear capabilities. |
| September 3, 2017 | Success | North Korea’s largest nuclear test. The regime claimed it was a thermonuclear weapon, and estimates of 50–160 kilotons made it by far the most powerful explosion in the country’s nuclear program. |
Selected ballistic missile tests
To deliver a nuclear warhead, North Korea needed a viable delivery mechanism. Over the years, its ballistic missile testing shifted from frequent explosions on the launchpad to long-range success.
| date | missile | result | description |
|---|---|---|---|
| July 5, 2006 | Taepodong-2 | Failure | A high-profile test of a multistage ballistic missile that exploded about 40 seconds after launch. |
| June 22, 2016 | Musudan/Hwasong-10 | Mostly failures | After five failed launches, North Korea conducted its most successful Musudan test to date, demonstrating significant progress despite falling well short of the missile’s projected range. |
| July 2017 | Hwasong-14 | Success | North Korea’s first successful intercontinental ballistic missile (ICBM). Analysts concluded that it could reach Alaska and potentially parts of the U.S. mainland. |
| November 2017 | Hwasong-15 | Success | A major breakthrough for North Korea’s missile program, this larger and more capable ICBM was assessed by analysts as capable of reaching most or all of the continental United States. |
| 2022–present | Hwasong-17 and solid-fuel variants | Success | Tests of the Hwasong-17 and newer solid-fuel ICBMs demonstrated North Korea’s continued progress in developing larger, more survivable missiles that can be launched with little preparation time. |