The Ministry of Education and Science announced on October 31 the "result" of the survey they did in June. Much like announcing the result in July (2PM on July 29, to be exact) of the survey they did in March about radioactive fallout in Tohoku and Kanto, where radioactive iodine, cesium tellurium and silver were found in abundance in Tokyo (see my post on August 1).
So, if tellurium and silver fell in Tokyo, it is very small wonder that they were in Fukushima soil within the 100-kilometer radius of Fukushima I Nuclear Power Plant.
Maps from the Ministry's announcement on October 31 are as follows. The amounts of tellurium and silver have been adjusted to the amounts as of June 14. I re-oriented and enlarged the maps for easier viewing but the resolution is not that great.
Tellurium-129m, half life about 34 days (the unit is becquerels/square meter):
Silver-110m probably came from melted control rods, and went all the way to Tokyo.
The announcement is NOT accompanied by the table that has actual measurements at these locations. But Mainichi Shinbun (10/31/2011) reports that the highest amount of tellurium-129m was found in Okuma-machi at 2.66 million becquerels/square meter.
The Ministry's fallback position of course is "they won't affect the health very much because the radiation from these nuclides is "small" compared to those from radioactive cesium.
Sure. They are shorter-life nuclides, which means radioactivity is stronger. Even if they simply pass through the body without accumulation, I would think they zap the body with radiation as they pass through. External exposure is another matter. I fearfully recall that many kindergarteners and elementary school pupils all over Tohoku and Kanto were made to plant rice with bare feet and hands back in April and May. (And they are made to dig up the sweet potatoes with bare hands now.)
What's interesting is the third map which plots the ratio of tellurium-129m to cesium-137. The tellurium-129m ratio is very pronounced south of Fuku-I nuke plant, toward Iwaki City and southern Ibaraki Prefecture: