US government works to 'cocoon' old nuclear reactors

Costs to clean up a massive nuclear weapons complex in Washington state are usually expressed in the hundreds of billions of dollars and involve decades of work

SPOKANE, Wash. -- Costs to clean up a massive nuclear weapons complex in Washington state are usually expressed in the hundreds of billions of dollars and involve decades of work.

But one project on the Hanford Nuclear Reservation is progressing at a much lower price.

The federal government is moving forward with the “cocooning” of eight plutonium production reactors at Hanford that will place them in a state of long-term storage to allow radiation inside to dissipate over a period of decades, until they can be dismantled and buried.

“It’s relatively non-expensive,” Mark French, a manager for the U.S. Department of Energy, said of cocooning. “The cost of trying to dismantle the reactor and demolish the reactor core would be extremely expensive and put workers at risk.”