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NHK reported the spiking up of radiation level was monitored on 3/16/2011 at Fukushima Daini, where is 12km south to Daiichi. This plant did not have meltdown supposedly.
The radiation level jumped up from 20 μSv/h to 87.7 μSv/h, when was from 9:40AM to 9:50AM of 3/16/2011.
The data had not been published until NHK requested Tepco for disclosure.
Officially, there was no plant explosion on 3/16/2011.
It is confirmed that around at 8:30AM of the same day, huge amount of white smoke was spouting out from reactor3. At 10:40AM, 10,000μSv/h of radiation was monitored at the entrance of Fukushima daiichi plant. However, NISA reported it may be from reactor2 for some reason. They heard the explosive sound from reactor2 on 3/15/2011, but it’s not 3/16/2011 and it didn’t have an explosion supposedly.
Also, around at 5:45AM of the same day, it is confirmed that reactor4 had fire on the North-West side of the 4th floor. However, details have never been reported.
It is still not known what exactly happened to cause the unusual radiation spiking up in the morning of 3/16/2011, when none of the plants were supposed to have exploded.
Tepco is stating that they are going to investigate why they did not publish the data.
Iori Mochizuki
2012-11-19 08:05:18