Um, let's try to keep things in perspective, please. This is very bad for the people that are near the plant, no question. But in global terms, the total amount of contaminated water that could potentially leak is miniscule. The Pacific Ocean is really, really big.

The article says that 400 metric tons of contaminated water are being added every day. Let's say that leakage rate goes on for 5 years. That's about a million metric tons of contaminated water.

The volume of the Pacific Ocean is about 660 million cubic kilometers. One cubic kilometer of water weighs about a billion metric tons; so the a million metric tons of radioactive water is one 660 billionth of the volume of the Pacific Ocean.

Now let's talk about the fuel rods. An accident involving those could potentially have effects similar to Chernobyl in terms of spreading radiation; but since there are four reactors at risk at Fukushima, we would expect the global effects to be about four times the global effect of Chernobyl. While the global effects of Chernobyl were certainly measurable, they hardly amounted to "an apocalyptic disaster", or even one fourth of one.