Three radioactively contaminated underground structures at high risk of collapse on the Hanford nuclear reservation could be filled with concrete-like grout within a year. The Department of Energy has concluded they could fail and release radioactive contamination. “A number of structures are overstressed and at risk of age-related failure, which could result in a release of contamination with impacts to human health and the environment,” DOE said in a letter last week to the Environmental Protection Agency, a Hanford regulator. Two of the structures, a trench and a tank at the center of the site, are estimated to be contaminated with a combined 170 to 255 pounds of plutonium.
Tri-City Herald 24th Feb 2020 read more »