The four towers at the former Calder Hall power station at Sellafield in Cumbria will be levelled on September 29.
There were exploratory mini-explosions earlier in the summer, but Sellafield had to apply for permission to drop the landmark structures.
Members of the public are being asked not to crowd the perimeter of the site to watch them go down, but watch on the Sellafield internet site.
Calder hall was opened in 1956 by the Queen. The towers cooled the water prior to its return to the turbine hall. They are all currently decommissioned.
(Picture: One of the Calder Hall towers).
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