zachery research is what happens to radioactive substances when chain reactions get out of control such as in the event of a nuclear accident. you know school friends i've seen them on do that with the direction of fuel elements we need to take into consideration the risk of accidents . we need to understand their behavior and the potential impact on the environment in extreme cases such as the complete destruction of the fuel elements. on that yet but on an example last see a human take the example of fukushima where radioactivity was released. don't be clear good because obviously it's a good idea to reduce these risks. a press worksman interrupts to say the severity of accidents varies well of course that was an extreme case. the research center is almost hermetically sealed hardly anyone is allowed inside. here in the centers would it grounds to some way up the hill a new research reactor is under construction. we were the 1st german t.v. team permitted to film here. france wants to show that it remains committed to the nuclear project it also hopes that before too long it will once