AIKEN, South Carolina, Aug. 1 -- The U.S. Department of Energy's Savannah River Site issued the following news release: After over six months of research, troubleshooting and coordination, contractor employees at the Savannah River Site have recently completed the replacement of a piece of equipment essential for operations in the Site's H Canyon chemical separations capable facility. The General Purpose Evaporator (GPE) is used to help concentrate low-level radioactive wastes from various sou more PR