North Korea's Nuclear Facilities Continue to Expand... Repeated Warnings [Yang Nakgyu's Defence Club]

IAEA Chief: "North Korea's Nuclear Activities Have Expanded Significantly"
South Korean and U.S. Military Authorities Closely Monitor Over 30 Nuclear Sites in North Korea

Rafael Grossi, Director General of the International Atomic Energy Agency (IAEA), has drawn attention by stating that North Korea's nuclear activities have expanded significantly.

In June 2008, North Korea demolished the cooling tower of the Yongbyon reactor as a disablement measure for the nuclear fuel rod manufacturing facility, in accordance with the Six-Party Talks agreement on North Korea's nuclear program. This event was even broadcast by American media. However, North Korea soon broke the agreement and proceeded with another nuclear test. (Photo by Yonhap News)

Director General Grossi recently met with Korean reporters at a hotel in Jongno-gu, Seoul, and said, "Even after the IAEA inspection team withdrew from North Korea in 2009, we have continued to analyze and assess North Korea's nuclear capabilities. We have confirmed that North Korea's nuclear activities have greatly expanded, ranging from the 5MW-class reactor in Yongbyon, the reprocessing plant, the light water reactor, to the activation of surrounding facilities." He added, "This suggests that North Korea's nuclear weapons production capability has increased significantly, to a level that appears sufficient to produce dozens of warheads."

Grossi, IAEA Director General: "North Korea's Nuclear Weapons Production Capability Has Increased Significantly"

South Korean and U.S. intelligence authorities are monitoring around 30 nuclear facilities across North Korea. Among these, the key sites are five high-density nuclear complexes. During the North Korea-U.S. summit held in Hanoi, Vietnam in February 2019, North Korean leader Kim Jong Un offered to dismantle the Yongbyon nuclear facility in Pyonganbuk-do in exchange for major sanctions relief. However, then-U.S. President Donald Trump pointed to five nuclear sites in North Korea.

At the time, it was speculated that the facilities President Trump mentioned included Kangson in Pyongannam-do, Taechon in Pyonganbuk-do, Huichon in Jagang-do, and Yongjeori in Yanggang-do. Some foreign media reported multiple times before the Hanoi summit that the nuclear weapons production capability in Kangson was higher than that of Yongbyon.

Yongbyon nuclear facility photographed by satellite

In addition to the sites identified by President Trump, intelligence agencies have also been closely monitoring areas such as Pyongsan in Hwanghaebuk-do, Pakchon in Pyonganbuk-do, and Sunchon in Pyongannam-do, where uranium mines, processing plants, and enrichment facilities are concentrated. North Korea is able to stably produce nuclear weapons because highly enriched uranium continues to be supplied from these regions through mining operations.

Among 30 Nuclear Facilities, Recent Activity at Pyongsan Plant Stands Out

In particular, activity at the Pyongsan plant in Hwanghaebuk-do has been notable. According to commercial satellite images from Planet Labs on April 14, North Korea recently carried out roof construction work on key facilities within the Pyongsan plant. This is interpreted as a signal that the uranium concentrate production line continues to operate through maintenance and refurbishment. The satellite images captured scenes of freight trains operating within the plant and an expansion of the area where solid waste from the refining process is piled up.

If North Korea is clandestinely operating a third nuclear material production facility in addition to the sites identified by South Korean and U.S. intelligence authorities, its "nuclear arsenal" could increase exponentially. This is because there would be a sufficient supply of raw materials for nuclear weapons. North Korea possesses two types of nuclear materials usable for weaponization: highly enriched uranium (HEU) and plutonium. Producing weapon-grade plutonium requires large reactors and reprocessing facilities, making such activities more easily detected by reconnaissance satellites. In contrast, HEU can be produced in smaller-scale facilities that can be installed underground, making them much harder for South Korean and U.S. assets to detect. As a result, nuclear materials can be secured more secretly and quickly.

North Korea Has Sufficient Materials and Facilities to Produce Nuclear Weapons

Production facilities are also sufficient. It is known that North Korea possesses approximately 10,000 to 12,000 centrifuges at uranium enrichment facilities in Kangson and Yongbyon alone. Considering that 2,000 centrifuges can typically produce about 40 kg of HEU annually, North Korea could theoretically secure 200 to 240 kg of HEU each year. Since about 25 kg of HEU is needed to make one nuclear warhead, some estimate that North Korea has the capability to produce eight to ten nuclear warheads per year using only HEU.

There is also considerable concern regarding nuclear wastewater. The South Korean government is conducting an actual condition survey related to nuclear wastewater from the uranium plant located in Pyongsan. Pyongsan is situated 53 km northwest of Kaesong. With uranium mines and refining facilities, the site discharges radioactive wastewater and waste. If North Korea's wastewater is contaminated with radioactivity, it could flow into the West Sea via the Yesong River.

Concerns Over Pyongsan Plant Nuclear Wastewater Discharge Polluting the West Sea

So far, no abnormalities have been observed. On March 20, the government announced that it had confirmed "no abnormalities" in the results of uranium and heavy metal (five types) analyses conducted due to concerns over West Sea pollution caused by wastewater discharge from the Pyongsan uranium plant in North Korea. According to a joint press release issued that day by relevant ministries, the uranium concentration at three monitoring points in Ganghwa, two points at the Han River and Imjin River estuaries, and two coastal points in Incheon was found to be at normal levels.

The government began conducting monthly joint investigations with relevant ministries from July last year, after concerns arose that radioactive wastewater from North Korea's Pyongsan uranium refining plant was being illegally discharged and flowing into Ganghwa Bay via the Yesong River. After no unusual findings were observed over six months, the investigation frequency was changed from monthly to quarterly (every three months) starting from December of last year.

This content was produced with the assistance of AI translation services.