PIKETON, Ohio – The site of the former Portsmouth Gaseous Diffusion Plant in Piketon is home to a significant number of radioactive cylinders, posing ongoing environmental and health risks. As of 2022, there are a total of 20,570 uranium hexafluoride (UF6) cylinders at the site, including 1,879 low-enriched uranium (LEU) cylinders, 18,206 depleted uranium cylinders, and 385 empty cylinders.
These cylinders, which have been stored in the open for decades, are known to be among the highest sources of radioactive contamination at the entire plant site. The U.S. Department of Energy has repeatedly reported the hazardous conditions associated with these cylinder yards.
Ultrasonic Thickness Testing
According to Nuclear Regulatory Commission (NRC) regulations, these UF6 cylinders are required to undergo regular inspections, including ultrasonic thickness testing (UTT). UTT is a non-destructive method used to measure the thickness of the cylinder walls. This process is vital for ensuring the integrity and safety of the cylinders, which are critical for the storage and transport of UF6.
Chemical Reaction and Corrosion
UF6 is highly reactive with moisture, forming uranyl fluoride (UO2F2) and hydrogen fluoride (HF). Both compounds are extremely corrosive and toxic. HF can lead to severe corrosion of the cylinder walls, potentially resulting in leaks and the release of hazardous materials. The environmental and health impacts of these compounds are severe; HF can cause respiratory issues, skin burns, and eye damage, while UO2F2 can lead to kidney damage and other serious health problems.
Historical Accidents
The potential risks are not hypothetical. In 1978, a major incident occurred when a UF6 cylinder ruptured, releasing over 20,000 pounds of uranium hexafluoride into the atmosphere. Over the years, there have been dozens of such accidental releases, exacerbating the environmental and health risks associated with the site.
Current Issues
In 2023, the Ohio Environmental Protection Agency (EPA) was called to inspect several leaking cylinders at the Portsmouth site. EPA inspectors documented the presence of epoxy resin covering cracks in the cylinders, indicating ongoing leakage and attempts at temporary repairs.
The presence of these large numbers of deteriorating UF6 cylinders underscores the urgent need for continued monitoring, maintenance, and remediation efforts to mitigate the risks posed by these radioactive materials. The situation at the Portsmouth Gaseous Diffusion Plant remains a significant concern for both public health and environmental safety.
