Skip to comments.Japan: 70,000 more should evacuate after Fukushima: Watchdog
Posted on 05/24/2011 9:25:10 AM PDT by TigerLikesRooster
70,000 more should evacuate after Fukushima: Watchdog
AFP | May 24, 2011, 05.30pm IST
PARIS: Seventy thousand people living beyond the 20-kilometre no-go zone around Fukushima should be evacuated because of radioactivity deposited by the crippled nuclear plant, a watchdog said.
Updating its assessment of the March 11 disaster, France's Institute for Radiological Protection and Nuclear Safety (IRSN) highlighted an area northwest of the plant that lies beyond the 20-km (12 mile) zone whose inhabitants have already been evacuated.
Radioactivity levels in this area range from several hundred becquerels per square metre to thousands or even several million bequerels per square metre, the IRSN report, issued late Monday, said.
(Excerpt) Read more at timesofindia.indiatimes.com ...
Fine, the watchdog group possibly has the numbers too high but even at half the distance... say half the 70k and that’s an extremely large number. Where do you send them? Where will they get housing? Where will they get jobs? But the most important to the Japanese is how much will that cost the government?
It is conceptually easy to contemplate mass evacuation of 70,000 people but a big decision politically. This problem was sort of in the middle of “have to address now” and “let’s kick the can down the road”. The Japanese were looking for more consensus, as usual.
It’s a big job doing a real radiological survey over such an area. My own point of view is that where you have several million becquerels per square meter of caesium 134 and 137 you should evacuate everyone under 30 or 40 years of age until you can fence off areas contaminated at about 200,000 becquerels per square meter or more. 20 millisieverts per year won’t hurt anyone who knows what they are doing. For instance, don’t eat the dirt. Wear a dust mask. Keep your skin clean. Don’t eat food grown in the area. It is OK to feed animals contaminated food and eat them but don’t eat anything but muscle and maybe fat. This should be fine but should be monitored as needed.
There was an April survey of dust samples at Fukushima province elementary schools.
Results are in Becq/m3.
Most readings are ‘not detected’ or 3000 or so.
There are a 10,000 and 16,000. It seems to me even those could be remedied by, carefully, running a garden tiller over the land.
The radiocaesium will migrate rapidly downward with rainwater, etc. The rainy season has started in Japan, and probably the surface radioactivity will be much lower on average later this year.
The usual radiocaesium remediation is removing an adequate layer of topsoil I understand.
Caesium being so water soluble and forming strongly positively charged ions I would expect you could mix the topsoil thoroughly with water and separate the caesium from the water with hydrogen ion exchange. A big messy job.
Once you had a reasonably dry concentrate I expect it would form a stable portland cement concrete containment. Keep it dry for a few hundred years....