After almost 60 years of nuclear power, countries are still looking for a solution for the large volumes of radioactive waste the industry creates.
Many nuclear countries argue that the material will remain deadly for centuries and will have to be buried deep underground in some sort of repository.
The hard bit is convincing local people to accept the waste in their backyard. In France, the European country most committed to nuclear energy, they are building an underground laboratory in Bure, in the Champagne-Ardenne region, which they hope will pave the way for an enormous underground nuclear waste dump.
The BBC's Rob Broomby has been there to take a look and sends us this report.
This segment aired on March 6, 2014.