Jackson, WY – A Wyoming watchdog group says it has obtained documents that reveal safety problems at the Idaho National Laboratory in Idaho Falls. Keep Yellowstone Nuclear Free has questioned the Department of Energy's plan to produce plutonium-238 at the facility. Keep Yellowstone Nuclear Free says the 40-year-old reactor is wearing out and should be replaced. The group also notes the facility couldn't withstand an earthquake. An Energy Department spokesman says upgrades have been made to the reactor in recent years and that the Advanced Test Reactor is operated safely.