Despite the prolonged nuclear crisis, Prime Minister Naoto Kan is set to announce at a G8 summit in France that Japan will keep using nuclear power, the Yomiuri newspaper said.

The cause of the worker's death was unknown. The man, in his 60s, was employed by one of Tokyo Electric's contractors and started working at the plant on Friday. He was exposed to 0.17 millisieverts of radiation on May 14, Tokyo Electric said.

The Japanese government's maximum level of exposure for male workers at the plant is 250 millisieverts for the duration of the effort to bring it under control.

The worker fell ill 50 minutes after starting work at 6:00 a.m. on May 14 (5 p.m. EDT on May 13) and brought to the plant's medical room unconscious. He was later moved to a nearby hospital and confirmed dead, a Tokyo Electric spokesman said.

Working conditions at the plant are harsh. Goshi Hosono, a special adviser to Prime Minister Naoto Kan and a ruling Democratic Party lawmaker, voiced concerns about the working environment at the Fukushima complex on May 11.

PM Kan plans to tell the G8 summit at the end of May in Deauville, France, that Japan will rely more on renewable energy, but it will also enhance safety of atomic power and continue nuclear power usage, making it clear the country is not withdrawing from nuclear power generation, the Yomiuri said.

Engineers are still struggling to bring the Fukushima plant under control. Two Tokyo Electric employees went missing while patrolling the plant soon after the quake and were later found dead.