Jap Gov declared cold shutdown without measuring neutron ray
Though Tepco stated they could not measure neutron ray in November, Tepco turned out to have no equipment to know if recriticality is going on by measuring neutron ray.
It became clear by the question of Japanese journalist, Iwakami Yasumi on the press conference of 2/13/2012.
Having reactor 2 heated, it became important to know if there is recriticality going on.
For the question of Mr. Iwakami to ask if they didn’t measure neutron ray, Tepco answered it is impossible to measure neutron ray out of reactor because it’s protected by perfectly designed facility.
However, when they measured Xe133 and 135 on 11/1/2011, Tepco denied the possibility of recriticality to state they couldn’t detect neutron ray in the plant area.
The statement of 2/13/2012 contradicts this explanation.
Japanese government declared cold shutdown without measuring neutron ray.
Their way of measuring Xe135 is suspicious too.
On 2/12/2012, they announced the Xe135 was not detectable (less than 9.5×10-2Bq/cm3)
However, the detectable limit was 1.0×10-5Bq/cm3 when they measured it in November.
This website updates the latest news about the Fukushima nuclear plant and also archives the past news from 2011. Because it's always updated and added live, articles, categories and the tags are not necessarily fitted in the latest format.
I am the writer of this website. About page remains in 2014. This is because my memory about 311 was clearer than now, 2023, and I think it can have a historical value. Now I'm living in Romania with 3 cats as an independent data scientist.
Actually, nothing has progressed in the plant since 2011. We still don't even know what is going on inside. They must keep cooling the crippled reactors by water, but additionally groundwater keeps flowing into the reactor buildings from the broken parts. This is why highly contaminated water is always produced more than it can circulate. Tepco is planning to officially discharge this water to the Pacific but Tritium is still remaining in it. They dilute this with seawater so that it is legally safe, but scientifically the same amount of radioactive tritium is contained. They say it is safe to discharge, but none of them have drunk it.