Radiation levels in one Fukushima reactor high enough to kill a human in two minutes – Fukushima 311 Watchdogs
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.
It recorded radiation measures in the area of 210 sieverts per hour, which are lethal enough to kill a human within two minutes.
This is not the first time a robot has become inoperable after entering the reactor.
During a previous survey, another robot designed to clean the debris for Sasori’s passage had to return halfway through when two of its cameras failed after being exposed for two hours to radiation and reaching its maximum tolerance of 1,000 sievert. Such an exposure to can kill a human within seconds.