Oct. 18, 2013
Radiation levels in groundwater under Tokyo Electric Power Co.‚Äôs Fukushima No. 1 nuclear plant are soaring, Tepco said Friday after taking samples from an observation well.
Tepco said 400,000 becquerels per liter of beta ray-emitting substances such as strontium were detected in water sampled Thursday from the well located some 15 meters from a storage tank that leaked about 300 tons of highly radioactive water in August.
The level of becquerels, a record high for water in that well, was up 6,500-fold from the 61 becquerels found Wednesday.
Tepco was planning to pump groundwater up from different wells about 100 meters from the leaky tank for release into the Pacific before the water flows into the damaged reactor buildings and becomes heavily contaminated with radioactive materials.