Emergency Declared After Tunnel Collapses at U.S. Nuclear Facility Sponsored by Revcontent

Hundreds of workers were told to 'take cover' after a tunnel in a plutonium uranium extraction (PUREX) plant collapsed at the Hanford Nuclear Reservation

• No workers were in the tunnel at the time of collapse

• Workers at the site have now been evacuated

• Those situated farther away were told to remain indoors

• It's beleived crews completing nearby road work may have created enough vibration to cause the collapse

• Hanford is the nation's most contaminated nuclear site, with cleanup expected to last decades

• It contains about 56 million gallons of radioactive waste, most of it in 177 underground tanks

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