Tokyo Electric Power Co. on Monday reported an increase in radioactive materials leaking from damaged nuclear reactors at the Fukushima … plant.While it is possible that the increased radiation is simply due to dust being stirred up, there is some evidence that the increase in radiation corresponds with recent earthquakes.
The total amount of radioactive cesium that leaked from the containment vessels of the No. 1 to No. 3 reactors reached 70 million becquerels per hour, up 12 million becquerels from the December level, the power firm said.
It seems that radioactive dusts were stirred up because plant workers went inside reactor buildings and removed rubble, TEPCO officials said.
Or it could be due to the possible escape of nuclear fuel from the nuclear container vessels.
Indeed, a Fukushima whistleblower allegedly claims that radioactive fuel is coming out from beneath the containment building:
These [highly-radioactive] yellow concrete slags come out from under the building one after one. It means that the container vessel is melting like honeycomb at least – doesn’t it? Otherwise why would metal uranium comes out of there ?