The head of the Korea Institute of Nuclear Safety (KINS) stated on the 18th that air samples collected from 23 different locations—both in the air, on land, and at sea—have been analyzed. However, no radioactive substances such as iodine or cesium were detected. The spread of radioactive materials in the atmosphere is extremely fast, making it challenging to capture them effectively.
Officials from the South Korean government speculated that North Korea may have used highly efficient radiation-absorbing materials, such as graphite, during its nuclear tests. They noted that North Korea has one of the most advanced graphite burial systems in the world. It is believed that a large quantity of graphite and rubber, both known for their ability to absorb radiation, was used in the construction of the No. 2 tunnel, aiming to minimize any radioactive leakage.
In addition, changes in the structure of North Korea's nuclear test tunnels have made detection more difficult. South Korean Defense Ministry officials mentioned that after North Korea's first nuclear test in 2006, the Canadian observatory detected some unusual seismic activity. However, since then, North Korea has modified the tunnel design, shifting from a straight configuration to a more complex, hook-shaped layout with multiple walls. As one official put it, "The birds can't fly," implying that the structural changes have significantly reduced the detectability of radioactive traces.
This ongoing effort highlights the challenges faced by international monitoring agencies in tracking North Korea’s nuclear activities. Despite these difficulties, South Korea remains committed to ensuring transparency and safety through continuous environmental monitoring and analysis.
Officials from the South Korean government speculated that North Korea may have used highly efficient radiation-absorbing materials, such as graphite, during its nuclear tests. They noted that North Korea has one of the most advanced graphite burial systems in the world. It is believed that a large quantity of graphite and rubber, both known for their ability to absorb radiation, was used in the construction of the No. 2 tunnel, aiming to minimize any radioactive leakage.
In addition, changes in the structure of North Korea's nuclear test tunnels have made detection more difficult. South Korean Defense Ministry officials mentioned that after North Korea's first nuclear test in 2006, the Canadian observatory detected some unusual seismic activity. However, since then, North Korea has modified the tunnel design, shifting from a straight configuration to a more complex, hook-shaped layout with multiple walls. As one official put it, "The birds can't fly," implying that the structural changes have significantly reduced the detectability of radioactive traces.
This ongoing effort highlights the challenges faced by international monitoring agencies in tracking North Korea’s nuclear activities. Despite these difficulties, South Korea remains committed to ensuring transparency and safety through continuous environmental monitoring and analysis.
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