Radioactive Iodine in Sewer Sludge in Oshu City, Iwate, EX-SKF, September 7, 2011:
Oshu City is located 187 kilometers north of Fukushima I Nuclear Power Plant.
The city announced the latest survey of radioactive materials in sewer sludge in a sewage treatment center in the city, and it shows iodine-131 being detected in the sludge cake since August 25. [...]
The city says it has stopped the shipment of sludge cakes from this plant because of the high radioactive iodine concentration detected from the August 25 sample [...]
Here is what nuclear engineer Arnie Gundersen said about the presence of iodine-131 back in April:
Iodine-131 can only come from nuclear fission, and because it has a short life, it disappears after about 80 days.
In other words, the presence of iodine-131 suggests that the [nuclear] fuel has started its own chain reaction without any human intervention.
Though not noted, the numbers in the chart above presumably refer to Becquerels per liter.
Published: September 7th, 2011 at 4:03 pm ET