The 47-year-old Mühleberg nuclear power plant, near Bern in Switzerland, was permanently shut down on Friday.
Journalists were shown the new safe confinement shelter with all its equipment installed on Tuesday.
Ukraine marks the 33rd anniversary of Chornobyl disaster, the biggest one in the history of nuclear energy.
Russia has said it is ready to commission the "world's only" floating nuclear power plant after running a series of successful tests.
To investigate the Israeli PM's claims that Iran was harboring a secret nuclear warehouse outside Tehran, Euronews correspondent Javad Montazeri went there to see for himself.
Greenpeace activists piloted a drone into the no-fly zone of the EDF-operated Bugey Nuclear Power Plant and crashed it against the heavily-reactive wall of its spent-fuel building on Tuesday to prove its vulnerability to foreign attacks.
A Superman drone is remotely controlled by Greenpeace activists and enters the no-fly zone of the nuclear plant of Bugey, Rhone valley, France.
Bulgaria is set to restart construction of a Russian designed nuclear power plant first proposed more than 30 years ago dating back to the end of the Cold War, in a move supporters say could reduce the country’s energy dependence on Russia.