A record high level of radioactive cesium has been found in groundwater beneath the crippled Fukushima No. 1 nuclear power plant, it operator TEPCO revealed.
On February 13, Tokyo Electric Power Co. reported 37,000 becquerels of cesium-134 and 93,000 becquerels of cesium-137 were detected per liter of groundwater sampled from a monitoring well earlier that day.
Water samples were taken from the technical well, located next to the second power unit, some 50 meters from the coast. These figures (the total reading) are the highest of all the cesium measurements taken previously.
Experts do not rule out that radioactive water is leaking from an underground tunnel, which is located close to the second power unit on the seashore.
However, no exact reason for such a significant increase of radioactive cesium content in the groundwater has been given so far.
Japanese newspaper The Asahi Shimbun reported that the amount of radioactive chemicals seems to be increasing. On Feb. 12, the same sampling well had produced a combined cesium reading of 76,000 becquerels per liter.
Continue reading at TEPCO reveals record cesium level in Fukushima No. 1 well
Related article: セシウム濃度、さらに上昇＝地下水で最悪１３万ベクレル－福島第１ via 時事ドットコム