gizmodo: The abbreviated mission suggests that radiation levels inside the reactor are even higher than was reported last week—and that robots are going to have a hell of a time cleaning this mess up. by George Dvorsky
'Last week, Gizmodo reported that radiation levels inside the containment vessel of reactor No. 2 at Fukushima reached a jaw-dropping 530 sieverts per hour, a level high enough to kill a human within seconds. Some Japanese government officials questioned the reading because Tokyo Electric Power Company Holding (TEPCO) calculated it by looking at camera interference on the robot sent in to investigate, rather than measuring it directly with a geiger counter or dosimeter.
'It now appears that this initial estimate may have been too low. Either that, or TEPCO’s robot is getting closer to the melted fuel—which is very likely. High radiation readings near any of the used fuel are to be expected.'