A worker at Japan's Fuji Electric Co., assembles a radiation dose meter to be sold to electric companies that are nuclear power owners or operators, at a factory in Tokyo May 20, 2011. Demand for radiation dose meters has risen about five times as compared to the numbers before the March 11 earthquake and tsunami which crippled the Fukushima Daiichi nuclear complex and triggered radiation leaks, according to the company spokesperson. REUTERS/Yuriko Nakao (JAPAN - Tags: DISASTER EMPLOYMENT BUSINESS ENERGY SCI TECH)