According to France the incident to Fukushimma reactors is much more serious than estimated by the Japanese.
According to the French the accident is a Class 5 ( Accident with significant consequences) or 6 (major accident) instead of INES 4 ( Accident with local consequences) as indicated by Japanese (f shame corriere.it ).
The information that comes from Nipponese authorities are sometimes confused by the "okay" to "we do not exclude the meltdown."
What is happening in these plants, with primary and secondary cooling systems fails, the fuel rods remain uncovered by water that acts as a moderator for the nuclear reaction but also serves as a coolant.
With the uncontrolled growth of the temperature of the reactor, the zirconium alloy that coats the uranium fuel rods began to melt and the water formed by reactions with hydrogen, a highly volatile gas . And the hydrogen produced in this way would have caused the explosion a number of Fukushima plant, which for now does not seem at risk merger. But the growth temperature is a danger, especially for fuel rods, whose merger, according to TEPCO, could have occurred in reactor number two in Fukushima. (Source espresso.it )
This article espresso. It is explained the situation and what can happen here.
below the first and second explosion
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