Workers at the Hanford Nuclear Reservation in southeastern Washington state were told to take cover for several hours today when steam was seen escaping from a tunnel where radioactive waste is being stored.
The take-cover order was lifted at about 12:15 p.m. PT when inspectors confirmed that there was no radiological release from Tunnel 2 at Hanford’s Plutonium Uranium Extraction facility, or PUREX, the U.S. Department of Energy’s Richland Operations Office reported in an update.
For the past few weeks, Hanford workers have been filling the 1,688-foot-long tunnel with thousands of cubic yards of grout to guard against the tunnel’s collapse. The tunnel, which dates back to 1964, houses a set of 28 rail cars that contain contaminated equipment. The last rail car was placed inside in 1996.