Fire marshal: Seeping water caused radioactive dump blast

LAS VEGAS — Rainwater seeping into corroded 1970s-era barrels buried at a radioactive waste dump caused an explosion last month at the long-closed facility about 110 miles northwest of Las Vegas, Nevada’s top fire investigator said. Radioactivity wasn’t detected after the Oct. 18 blast and fire, and no injuries were reported, Nevada Fire Marshal Peter Mulvihill said this week. Several 55-gallon drums blown beyond the facility fence were returned to the crater and reburied, and