Highly contaminated water (more than 2.3 billion becquerels per liter) was found in a trench near one of the reactors. Radiation levels this high have not been seen since the initial disaster happened. Tepco is searching for the source of the contaminated water and is trying to stop the leaking into the ocean.
In other recent Fukushima news:
A couple weeks ago Cesium levels jumped 100 times higher in groundwater.
Kevin Kamps, Radioactive Waste Watchdog at Beyond Nuclear: Well, the best I can come up with for what's happening in recent days and weeks at Fukushima Daiichi is hemorrhaging of radioactivity.
And the scariest part of all is that they don't know where it's coming from.
But ultimately it's coming from 3 melted down atomic reactor cores and severely damaged, if not entirely destroyed, radiological containment structures. That's where it's ultimately coming from. But why it's getting out now in such a hurry all of a sudden is the big mystery.
Steam Raises Concern At Japanese Nuclear Plant [...] The steam was first seen at the unit 3 reactor late last week, and it's continued on-and-off ever since. [...] many were startled by the fresh video. They had reason for concern: [...] Some fuel could have shifted and created an unexpected hot spot, or worse restarted nuclear reactions. But both scenarios appear unlikely.