Fukushima reactor shows radiation levels much higher than thought

[Yo_Mama]

13. Almost 73 sieverts an hour

That's what they measured on the last endoscopy. 72,900 millisieverts. 1 sievert = 1,000 millisieverts.

Without the covering of water, some of the broken down fuel must be exposed to air.
http://www.japantimes.co.jp/text/nn20120328x1.html

They would like to repair the leaks so they could raise the water level, but they are in a Catch 22 situation now, at which radiation-hardened robots will have difficulty operating, and humans darned sure can't.

It's daunting, to say the least. I saw an estimate that the special endoscope they used will work for less than a day in those conditions.