Chernobyl Hot Particles Remain Stable After 40 Years

• •Researchers found Chernobyl's hot particles are more stable than expected.
• •Three types of hot particles were identified, each with different chemical properties.
• •Continued study of these particles is crucial for assessing long-term health risks.

Researchers from Leibniz University Hannover and Helmholtz-Zentrum Dresden-Rossendorf have analyzed six radioactive particles from the Chernobyl disaster, revealing they are more chemically stable than previously thought. These 'hot particles', measuring 8 to 50 micrometers, were released during the reactor explosion in 1986 and still pose health risks. The study categorized the particles into three types: those similar to uranium dioxide, those fused with zirconium from high temperatures, and those oxidized during the graphite fire. The findings suggest that the particles' crystal structures have remained largely intact over the decades. The research aims to improve assessments of health risks associated with these radioactive remnants. Protective gear is still required for those entering the contaminated areas of the Chernobyl Exclusion Zone. The results were published in the Journal of Hazardous Materials.