Engineers working to decommission the Sizewell A power station in Suffolk say they have removed 75 percent of the radioactive fuel rods from the plant's two reactors.
The spent elements are being transported to the Sellafield plant in Cumbria for reprocessing.
The Nuclear Decommissioning Authority, which is overseeing the work, says once all the fuel has been removed the radiological hazard at Sizewell will have been reduced by more than 99%.
Plans for a new nuclear reactor at Sizewell in Suffolk will go on show for the first time today.
The European Pressurised Reactor could cost upto 10 billion pounds to build.
EDF Energy, which has drawn up the plans, says the reactor could provide enough electricity for 5 million homes.