Reuter's article on the Fukushima leak. Good images on the "temporary" tank farm for radioactive water.
Especially check out the slideshow and the video. You'll get a very good idea why they have leak problems and why they're likely to get worse. Basically, I see large tanks packed together, set on what appears to be asphalt or in one slide right on the dirt, and completely inadequate dikes.
Dear TEPCO, temporary does not mean two years.