Plutonium detected outside N-plant site, Yomiuri Shimbun, October 2, 2011:
[...] A map released by the Education, Culture, Sports, Science and Technology Ministry on Friday shows plutonium was found in soil samples taken from a total of six locations in Futabamachi, Namiemachi and Iitatemura, Fukushima Prefecture. [...]
A preliminary ministry calculation shows that the level of plutonium contamination in Namiemachi will remain at 0.027 millisieverts for about 50 years. The other five spots were contaminated with 0.55 to 2.3 becquerels of plutonium. [...]
The article does not mention a time component for the 0.027 millisievert (27 microsievert) radiation dose.
Published: October 2nd, 2011 at 10:12 am ET