Fukushima: Myth of Safety, Reality of Geoscience 206
An anonymous reader writes "The Bulletin of the Atomic Scientists' has published a special Fukushima issue with interesting/deep/new pieces written by leading experts on the nuclear disaster in Japan. Fukushima: The myth of safety, the reality of geoscience, which shows that in the decades after the nuclear plant was built, the authorities discovered historical records that showed Fukushima was vulnerable to a giant tsunami, but they did nothing to protect the plant. But there's a globalized twist to the issue: The Bulletin has also translated these lengthy expert analyses of the disaster into Japanese. As Bulletin editor Mindy Kay Bricker explains: 'Those in genuine need of erudite analysis are, of course, those directly affected by the Fukushima disaster, the Japanese population. Stellar coverage by Western news outlets might win awards, but what is the point if those who most deserve the information never benefit from reading it?'"
Still No Deaths From Radiation (Score:5, Informative)
And still zero deaths attributable from the disaster due to radiation.
Did you know that in March--the same month as Fukishima--that a worker at an aging US power plant, scheduled to be closed and currently down for maintenance, was killed in an explosion? But it wasn't a nuclear plant (it was coal) so no one cared. The company's been fined, but no government is committing to shutting down 100% of its coal plants.
And yeah, it's still too early to detect any increase in cancer rates, but by the six-month mark, Chernobyl had killed about 300 people via acute radiation sickness, so I don't see how anyone can claim this either IS worse than Chernobyl or WILL BE worse. 300 versus zero.
Re:Close them all (Score:2, Informative)
Re:The major lessons (Score:3, Informative)
Plutonium spent fuel has a huge half-life, apply your logarithms to it and check for how long it has to be kept. Strontium, which is extremely toxic as it is absorbed into bones (same chemistry as calcium) has a very long half life too. Even Cesium is 30 years, so it will be around for much longer than that.
Re:The major lessons (Score:5, Informative)
Wind turbines suffering blade failures and ice throws have killed many people, more per MWh generated than nuclear has. Consequently, France has established 500 m exclusion zones [caithnesswindfarms.co.uk] around wind turbines, where people are prohibited from entering. Germany has a 600 m exclusion zone. For a given amount of average MW generated, the area of this mandated exclusion zone for wind farms far exceeds the evacuation zone caused by the Fukushima accident. You can reduce the size of the exclusion zone by putting turbines closer together, but it's still far worse than nuclear.
The Fukushima plant had a nominal production capacity of 4696 MW. Multiplied by nuclear's average 90% capacity factor and that's 4226 MW average for the year. It currently has a 20 km evacuation zone, and let's ignore that roughly half of that zone extends over the sea. A 20 km radius encompasses an area of 1257 km^2. So the evacuation zone (which is by no means permanent, nor likely to be permanent) works out to 0.297 km^2 per MW average.
The largest wind farm in Europe is Whitelee Wind farm [wikipedia.org] in Scotland. It has a nominal generating capacity of 322 MW. Onshore wind typically has a 20%-25% capacity factor, but Scotland's winds are strong and consistent, yielding an average capacity factor around 40%. So that's 128.8 MW average for the year. The farm covers 55 km^2 [cskills.org] in a 13x8 km rectangle. Add a half km exclusion zone around the periphery and you get a total area of 76 km^2. So its exclusion zone works out to 0.590 km^2 per MW on average.
So just the regular operation of the largest wind farm in Europe renders about twice as much land uninhabitable as the second-worst nuclear accident in history, MW for MW. Hydroelectric dams create a lake behind them, rendering that land uninhabitable. Itaipu dam [wikipedia.org] has a 1350 km^2 reservoir. It generates 91.6 TWh annually, which works out to 10449 MW on average, for an uninhabitable area of 0.129 km^2 per MW average. Solar (pretty much the most expensive power source) actually fares well by this metric. At 125 W/m^2 and a 15% capacity factor, it weighs in at a featherweight 0.053 km^2 per MW on average.
But wait, we looked at pretty much the worst case for nuclear, while looking at average or better-than-average cases for other technologies. What happens if you look at nuclear on average? After all, the vast majority of nuclear plants have operated safely for decades. The world's nuclear capaicty is 351 GW. The evacuation zones around Fukushima (20 km) and Chernobyl (30 km) work out to 4084 km^2. The average land area rendered uninhabitable by nuclear works out to 0.012 km^2 per MW on average. In other words, nuclear is the technology which renders the least amount of land uninhabitable per MW generated. If you replaced all nuclear power with solar, you'd render 4.6x as much land area as Fukushima + Chernobyl uninhabitable. Hydro would be 11x as much. And wind about 51x as much land area uninhabitable (about 100x for a more typical wind far than Whitelee).