The nearly three-metre-wide metal ring, which sat on the top of the reactor tank in DR3, has been pulled up. Like the promise earlier this year, today's operation was conducted with high professional expertise from Dutch Mammoet and custom-made equipment from Aalborg company Bladt Industries.

Concrete dust, grinders and full suits. Much of the time looks like decommissioning quite a lot of time. The powder room where Risø handled uranium for fuel rods has been thoroughly sanded down on all surfaces.

In May 2014, Danish Decommissioning carried out a major operation: lifting the 22-tonne metal plug from Denmark's largest research reactor DR3. The actual lifting of the plug took an hour, and the operation can be seen in timelapse here.

Success: the massive metal plug that closed Denmark's biggest research reactor DR3 has been pulled open and replaced with a lid. Due to heavy radiation down from the reactor tank, the historic operation has been planned in detail over the past years. DD praises the cooperation with Mammoet and Bladt Industries.

DD is well advanced in the clean-up and release of the facility where Risø produced fuel for the experimental reactors. Come on a tour of the building and read about the task of removing radioactive contamination from floors, walls and drains.

They have raised the kursk nuclear submarine from the bottom of the arctic ocean and erected an overturned 80-ton crane at the Lindø shipyard after the 1999 hurricane. Now Dutch Mammoet with its muscle cranes must pull up a giant metal plug from Risø's largest research reactor.

Follow the work to break down Denmark's largest research reactor DR3 from the former Risø Research Centre. Our task is to decontaminate the former experimental area on the Risø peninsula into a "green field" - i.e. to remove radioactivity and chemicals so that the area can be used without restrictions in the future. The DR3 reactor is one of the projects.

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