Tokyo Electric Power Co (TEPCO)'s handout shows a worker in protective gear measuring radiation levels at the bottom of a ventilation stack standing between Fukushima Daiichi nuclear power plant's No 1 and No 2 reactors, where radiation exceeding 10 sieverts (10,000 millisieverts) per hour was found, in Fukushima prefecture, northern Japan August 1, 2011, released by TEPCO August 2, 2011. [Photo / Agencies]