A 55-in.-dia cut into a rebar-reinforced underground concrete tank with hardened nuclear waste, the largest slice ever into such a U.S. Energy Dept. storage structure, went “perfectly” on Dec. 19, says a site cleanup official. Photo: Courtesy of U.S. Energy Dept. Crew lifts an underground concrete waste tank’s plug—wrapped in protective plastic to avoid contamination spread during operation—to install a robotic waste removal arm. In what may become the norm at DOE’s Hanford site in eastern Washington state and possibly at other U.S. waste sites, crews from Boston-based AK Services used a pressurized mix of garnet and water to methodically
The market is generally healthy and steadily growing, and margins are up for large specialty contractors. Further, advances in design tools and owner demand for collaboration are giving subcontractors a seat at the table early on in projects.