More workers at a New Mexico nuclear-waste depository will be tested for radioactive exposure after results showed that 13 employees had been contaminated, officials with the U.S. Department of Energy said Thursday. The 13 employees at the Waste Isolation Pilot Plant in the outskirts of Carlsbad were working Feb. 14 when a radiation leak was detected at the facility. The government contractor that runs the plant, Nuclear Waste Partnership LLC, is now asking employees who were present the following day to also submit samples for testing, said Farok Sharif, the company’s president. The Energy Department is still in the process of determining the cause of the leak, the first ever reported at the site, which has been storing waste material from the research and production of nuclear weapons deep underground since 1999. But the agency said Wednesday that initial tests show the workers were exposed to americium, a contaminant […]