JAPAN-NUCLEAR/

The interior of the No. 4 reactor building is seen at the Tokyo Electric Power Co's (TEPCO) tsunami-crippled Fukushima Daiichi nuclear power plant in Fukushima prefecture May 26, 2012. Japanese officials said on Saturday the unprecedented effort to remove spent fuel rods from the reactor was on track despite lingering concerns about the structure's vulnerability to another earthquake. Picture taken May 26, 2012. REUTERS/Toshiaki Shimizu/Pool (JAPAN - Tags: DISASTER ENERGY) JAPAN OUT. NO COMMERCIAL OR EDITORIAL SALES IN JAPAN