An aerial view shows Tokyo Electric Power Co. (TEPCO)'s tsunami-crippled Fukushima Daiichi nuclear power plant and its contaminated water storage tanks (bottom) in Fukushima, in this file photo taken ... more 
An aerial view shows Tokyo Electric Power Co. (TEPCO)'s tsunami-crippled Fukushima Daiichi nuclear power plant and its contaminated water storage tanks (bottom) in Fukushima, in this file photo taken by Kyodo August 20, 2013. Highly radioactive water overflowed barriers into Japan's Fukushima Daiichi nuclear power plant, its operating utility said on October 21, 2013, after it underestimated how much rain would fall at the plant and failed to pump it out quickly enough. After heavy rain on October 20, water with high levels of radioactive strontium overflowed containment areas built around some 1,000 tanks storing tonnes of radioactive water at the plant, Tepco said. Mandatory Credit. REUTERS/Kyodo/Files (JAPAN - Tags: DISASTER ENVIRONMENT POLITICS ENERGY) ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS PICTURE IS DISTRIBUTED EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS. MANDATORY CREDIT. JAPAN OUT. NO COMMERCIAL OR EDITORIAL SALES IN JAPAN. YES less 
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Reuters | Photo By KYODO / REUTERS
Sun, Oct 20, 2013 11:17 PM EDT