*There is a report on urine test done by NGO-ACRO for 4 year old girl
(0.1Bq/litter, equivalent to 6 Bq)
- Semptember, 2011
1st test: Cesium 4.64Bq/litter was detected.
- April, 2012
2nd test: C134 no detection (detection limit 0.082Bq/L) C137 0.090Bq/litter (detection limit 0.081)
(Editor's note) Because the detection limit is very low, they can detect sign of illness before it get too late. Also it's useful to know what works the best to minimize the danger.
As far as I know Wholebody counter (Fujitsu) the Fukushima Health Survey was using before cost 50,000,000yen (=$500,000). I heard that now they use the one called "Fast Scan" - CANBERRA
Detection limit 300Bq/kg for C134 and C137
Length of measurement is 2-5min.
It was used to be Cs-134: 320Bq, Cs-137: 570Bq when 109 residents were measured as of July 2011.
I would like to share this piece of information from the comment in nuclear-news.net for my part 1 article. Chernobyl Children Fukushima Children | July 13, 2013
"Phoswich Detectors in Partial body counter can measure internal emitters such as Americium 241 (decay prodcut of Plutonium 241), Uranium 235 and Plutonium 239, these are low-energy measurements. Measuring takes usually 35 Minutes. Costs: 400 – 500+ USD. http://bibliothek.fzk.de/zb/abstracts/7238.htm
Here is more information on wholebody counter.
1."A typical detection limit of radoactive cesum is about 40Bq"
2."count times can be from 1 minute to about 30 minutes"
WBC test has been offered to children under 18 years old free in Fukushima. So they tend to go there instead of private ones that they have to pay. It seems that in Japan WBC has been used in the way that they could test the residents as fast and efficient as possible and give low detection result in order to give the residents comfort but not really warning the danger.
I wanted to share Prof. Yazasaki's view on wholebody counter and urine test (as well as other information I gathered in Japanese website because in the west Prof. Hayano's work (at Hirata central hospital)using WBC's test'result seems to get acknowledged. For example his study was used in Ian Fairlie's lecture at New York symposium in March this year.