Narrator: Yukitero Naka and his people know what is really happening in the nuclear ruins. [...] Even if they were able to create enough qualified engineers and staff for the next 40 years, one problem remains that could change Japan and the world.
Question: Is the nuclear power plant safe now?
Yukitero Naka, Nuclear Engineer: Well, that’s what TEPCO and the government says, but the people in there don’t believe it.
There is still a great danger.
My personal concern is the fourth reactor block.
The building has been strongly damaged by the earthquake.
There are approximately 1300 spent fuel rods in the cooling pond on level four. In the level above newer rods are stored as well as a lot of heavy machinery. This is all very, very heavy.
If another earthquake occurs then the building could collapse and another chain reaction could very likely occur.
Narrator: So, a meltdown under the free sky which would be the end of Japan as we know it today.
The radiation would be direct deadly.
The work on the ground would be totally impossible.
The most likely consequence is that reactors 1, 2, 3, 5 and 6 get out of control.
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