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http://www.guardian.co.uk/world/2013/feb/23/radiactive-waste-leak-washington-state
No "immediate" danger doesn't mean much really.
Six underground storage tanks at a nuclear facility in Washington state are leaking radioactive waste, but there is no immediate risk to human health, officials say.
The newly discovered leaks, at the Hanford Nuclear Reservation, come one week after the US energy department revealed that radioactive waste was found to be escaping from one tank at Hanford.
[...]
"There is no immediate or near-term health risk associated with these newly discovered leaks, which are more than 5 miles (8km) from the Columbia River," Inslee said. "But nonetheless this is disturbing news for all Washingtonians."
The governor said Chu told him that his department initially missed the other five leaking tanks because staff there did not adequately analyse data.
"This certainly raises serious questions about the integrity of all 149 single-shell tanks with radioactive liquid and sludge at Hanford," he said.
The energy department issued a brief statement acknowledging that six waste tanks were found to be leaking.
No "immediate" danger doesn't mean much really.
"It points to the age of the tanks and how there's going to be an increased probability of this happening in the future," she said. "When waste is in the tanks, it's manageable. Once it's out of the tanks and in the soil, it's much harder to manage it, remove it, and down the road you're adding to contamination in the groundwater that already exists."
Production of plutonium materials at the site continued through the Cold War and ended there in 1989[/U] as work shifted to cleanup of nuclear and chemical waste at Hanford, considered one of the largest and most complex such projects in the country. Weapons production at the site resulted in more than 43m cubic yards of radioactive waste and 130m cubic yards of contaminated soil and debris, according to the US Environmental Protection Agency, which says that approximately 475bn gallons of contaminated water have been discharged into the soil.