A transport tunnel partly collapsed at the Hanford Nuclear Reservation on Tuesday. United States Department of Energy officials said there was no initial indication of worker exposure or airborne radiological release. Although the site is vacant, it is being dismantled and cleaned by the Department of Energy. The Hanford facility was established in the 1940s and operated by the federal government to manufacture plutonium. Response crews determined that a 400-square-foot section of the decommissioned rail tunnel had collapsed.

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