Tokyo Electric Power Co. says it has found that an unspecified amount of water contaminated with a highly concentrated radioactive substance escaped from another storage tank at the Fukushima No. 1 nuclear plant and some may have reached the Pacific Ocean.
Tepco said Wednesday it detected 200,000 becquerels per liter of beta ray-emitting radioactive substances, including strontium-90, far above the legal limit of 30 becquerels per liter, as well as cesium-134 and -137, both within their legal limits.
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