Source : NHK World
https://www3.nhk.or.jp/nhkworld/english/news/20131207_01.html
Highest radiation levels measured outside reactor
Tokyo Electric Power Company says radiation levels are extremely high in an area near a ventilation pipe at the crippled Fukushima Daiichi nuclear power plant.
TEPCO found radiation of 25 sieverts an hour on a duct, which connects reactor buildings and the 120-meter-tall ventilation pipe.
The estimated radiation level is the highest (...)