This is true at this point. The radioactive release is lower than Chernobyl by an order of magnitude. However, "One official from Tepco said that radiation leaks had not stopped completely and could eventually exceed those at Chernobyl, Reuters news agency reported." (
http://www.bbc.co.uk/news/world-asia-pacific-13045341) I doubt that Tepco is overstating the case. It's a bit like watching a train wreck in slow motion.
BTW, the BBC provided a chart comparing the two:
http://www.bbc.co.uk/news/world-asia-pacific-13050228
For some reason, what pops into my head is Mercutio's line from Romeo & Juliet, speaking of his fatal wound: "'tis not so deep as a well, nor so wide as a
church-door; but 'tis enough,'twill serve."
Absolutely right, it's not over yet, and more radiation will certainly be released. Train wreck in slow motion is a very apt description.
I think the issue in question here is: How to you measure "worse"?
From the BBC chart you linked:
The affected area of the Fukushima disaster is "
60km (36 miles) to the north-west of the plant and about
40km to the south-southwest have seen radiation levels exceed annual limits". For the Chernobyl disaster the affected area is given as: Contamination of an area as far as
500 km (300 miles) from the plant, according to the UN. But animals and plants were also affected much further away.
That means the affected area at Fukushima is about 4000 square km compared to 800,000 square km (and more). That's
200 times more area contaminated by Chernobyl.
If we look at
long-term health damage as a measure of "worse", the BBC comparison says that at Fukushima, the long-term health damage is "Not yet known, but risks to human health are thought to be
low."
While at Chernobyl, "Among the residents of Belarus, the Russian Federation and Ukraine, there had been up to the year 2005 more than
6,000 cases of thyroid cancer reported in children and adolescents who were exposed at the time of the accident, and
more cases can be expected during the next decades." The number of deaths among plant workers at Chernobyl is unclear, but 64 are confirmed and
thousands of cancer deaths are likely based on the amount of exposure workers received during the clean-up.
There will likely be cancer deaths among the several hundred people working at Fukushima Daiashi, but it's unlikely to be in the thousands because there is no exposed core. That is a
huge difference.
I'm not saying Fukushima Daiashi isn't a huge disaster -- It unquestionably is. But the impact on the world's environment and population is much less than the impact of Chernobyl. This is largely because the fissioning cores at Fukushima are still contained in both their reactor vessels, and their containment domes. At Chernobyl there was an explosion
in the core which threw fissioning core into the atmosphere and onto the land around the plant. There was also no containment dome to protect the environment from the melting core after the event. Fukushima's cores are contained and cooling, not exposed and getting hotter as they were at Chernobyl.
So, if you want to measure strictly by amount of radiation release (and all radiation is not created equal), then Fukushima may eventually release as much total radiation as Chernobyl. We'll have to wait and see.
My personal measure of "worse", however, is based on human and environmental impact, which is much less (thank goodness and better design) at Fukushima than it was as Chernobyl.
Neither disaster should have happened. Both were preventable. Fukushima, in particular, could have been much less of a disaster if TEPCO had been more concerned about the environment and the population than it was about the cost of losing the reactors. Still, I'll take Fukushima over Chernobyl any time, and pray that I never have to "take" either one.