The radiation levels in Fukushima's unit two reactor are so high they could kill a human in two minutes, according to data collected by a robot.
Tokyo Electric Power, the company which operates the nuclear plant in Fukushima, carried out a robotic survey of the area around the core that melted six years ago, following the earthquake and tsunami that triggered the nuclear accident.
But the scorpion robot Sasori got stuck inside the reactor after its crawling functions failed while climbing over highly radioactive debris and had to be abandoned inside the reactor.
http://www.independent.co.uk/news/world/asia/radiation-fukushima-nuclear-plant-high-enough-kill-human-two-minutes-a7587646.html