Crews at the U.S. Energy Dept.’s Hanford nuclear-waste site in Washington state have placed the first of six massive, 50-ton shield doors at the site’s high-level waste treatment facility with a fit no wider than a human hair, say officials of San Francisco-based Bechtel National Inc., design-contractor for the $12.2-billion project on the 560-sq-mile site. Photo: Bechtel National Inc. Crews supervise installation of the first of six 50-ton radiation shield doors at Hanford site. Photo: Bechtel National Inc. The shield door is in a key area of the 65-acre plant complex, which, when completed, will vitrify high-level nuclear waste now
The 2016 Summer Olympics boating and swimming events have put an international spotlight on what has been a long-running problem in Rio de Janeiro—untreated sewage and trash are clogging up major bays and waterways.