– Temperature of reactor 6 is unstable (Fukushima Diary, Mar 9, 2012)
– 520 ?Sv/h in Futabamachi Fukushima (Fukushima Diary, Mar 9, 2012)
– 3.43 Million Bq/Kg of Radioactive Cesium in “Black Dust” in Minami Soma City, Fukushima (EX-SKF, Mar 8, 2012):
Whatever this substance is, the number is extremely high.
About this “black dust” in Minami Soma, see my past posts, here, here, here.
Minami Soma City’s Assemblyman Ooyama reports on his blog (3/8/2012):
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Cs-134 1,498,000 ± 1,586 Bq/kg
Cs-137 1,932,900 ± 2,481 Bq/kg
TOTAL 3,430,900± 2,945 Bq/kg
It seems to be part of the report by Professor Tomoya Yamauchi of Kobe University who did the measurement. Mr. Ooyama lists the result of 11 samples tested by Professor Yamauchi.
The NGO in Minami Soma, HCR, seems to have some kind of a fallout with the assemblyman’s volunteer group over the “black dust”, and they’ve been making rather wild announcements (telling residents that the black dust was plutonium, when there was no alpha emission was detected, for example). I am still trying to get the overall picture on this matter.
– Fukushima citizen 90 mSv of thyroid exposure (Fukushima Diary, Mar 9, 2012)
– 89 Millisieverts Equivalent Dose at Thyroid from a Resident in Namie-machi, Fukushima, Says Hirosaki University Researchers (EX-SKF, Mar 8, 2012):
Professor Shinji Tokonami, Department of Radiation Physics, Institute of Radiation Emergency Medicine, Hirosaki University and his researchers say people who escaped from the coastal areas of Fukushima Prefecture after the accident and people who continued to live in Namie-machi after the March 11, 2011 nuclear accident were found with high levels of radiation exposure on the thyroid.
They tested 65 residents in April 2011, and it is in the news on March 9, 2012. Another case of nearly one-year delay in disclosing the information that would have made the difference if known earlier. Like 11 months ago.
From Asahi Shinbun (3/9/2012):
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It has been disclosed that someone was exposed to nearly 90 millisievert radiation [equivalent dose] on the thyroid from radioactive iodine during the Fukushima I Nuclear Power Plant accident. Professor Shinji Tokonami, Department of Radiation Physics, Institute of Radiation Emergency Medicine, Hirosaki University and his researchers analyzed the test result of 65 Fukushima residents. The test was conducted 1 month after the accident. Of people who were exposed to radiation, about half had equivalent dose of 10 millisieverts or less, but 5 people had equivalent dose exceeding 50 millisieverts.
Read moreRADIOACTIVE JAPAN: 3.43 MILLION Bq/Kg Radioactive Cesium In ‘Black Dust’ in Minami Soma City – Up To 90 MILLISIEVERTS Of Thyroid Exposure Measured In Citizens – Reactor 6 Is Unstable – 520 MicroSieverts/Hour In Futabamachi