Friday, November 19, 1999
Options for treating Fernald waste
Two technologies are being considered to treat hazardous and radioactive waste stored in two crumbling silos at the former Fernald uranium processing plant. The Department of Energy will select one in the spring, subject to U.S. and Ohio Environmental Protection Agencies' approval.
VITRIFICATION
• A complicated, high-temperature process that bonds the hazardous waste into small, glass-like pellets.
• The pellets contain 90 percent waste material and 10 percent additives.
• Produces about 2,000 filled boxes to be shipped over three years.
• Emits more radon gas during processing than does chemical stabilization.
• After processing, emits no radon gas, but higher level of radiation than chemically stabilized bricks.
• Produces solid, long-lasting pellets.
• Requires more manpower and hours to treat at Fernald, increasing the risk of worker accident.
• Favored by Fernald Residents for Environmental Safety and Health.
CHEMICAL STABILIZATION
• A cold process mixing the waste material with cement and other dry materials to produce large, cement-
like bricks.
• The bricks contain 30 percent waste material and 70 percent additives.
• Produces about 6,000 filled boxes to be shipped over three years.
• After processing, emits radon gas, but lower level of radiation than vitrified pellets.
• Produces bricks that may crumble over time.
• Requires more shipments, increasing the risk of transit accident.
• Favored by the U.S. Department of Energy.
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