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@radioguy This is my big concern. What is the back up plan? Even if it isn't pretty, stating what the back up scenario is and how to deal with it needs to be talked about.

It does look grayish, but the whole sky is gray, hard to tell.

@Optim but...this is the allowance for an NPP worker, not the public.

Fukushima city removing schools' topsoil [Kyodo, April 28]: search.japantimes.co.jp

Koriyama, Fukushima Prefecture, began removing the topsoil from playgrounds at its elementary and nursery schools Wednesday, following radiation leaks from the nearby Fukushima No. 1 nuclear power plant.
...
The education and science ministry has set a radiation limit of 3.8 microsieverts per hour to allow children in Fukushima Prefecture to play outdoors.

OPINION: Children of Fukushima need our protection

By Tilman Ruff
MELBOURNE, April 26, Kyodo

I was dismayed to learn that the Ministry of Education, Culture, Sports, Science and Technology earlier this week increased the allowable dose of ionizing radiation for children in Fukushima Prefecture.

The dose they set, 3.8 microsieverts per hour, equates to more than 33 millisieverts (mSv) over a year. This is to apply to children in kindergartens, nursery, primary and junior high schools. Let me try to put this in perspective.

Widely accepted science tells us that the health risk from radiation is proportional to the dose -- the bigger the dose the greater the risk, and there is no level without risk.

The International Commission on Radiological Protection recommends that all radiation exposure be kept as low as achievable, and for the public, on top of background radiation and any medical procedures, should not exceed 1 mSv per year.

For nuclear industry workers, they recommend a maximum permissible annual dose of 20 mSv averaged over five years, with no more than 50 mSv in any one year.

In Japan the maximum allowed annual dose for workers, 100 mSv, was already higher than international standards. This has been increased in response to the Fukushima disaster to 250 mSv.

The U.S. National Academy of Sciences BEIR VII report estimates that each 1 mSv of radiation is associated with an increased risk of solid cancer (cancers other than leukemia) of about 1 in 10,000; an increased risk of leukemia of about 1 in 100,000; and a 1 in 17,500 increased risk of dying from cancer.

But a critical factor is that not everyone faces the same level of risk. For infants (under 1 year of age) the radiation-related cancer risk is 3 to 4 times higher than for adults; and female infants are twice as susceptible as male infants.

Females' overall risk of cancer related to radiation exposure is 40 percent greater than for males. Fetuses in the womb are the most radiation-sensitive of all.

The pioneering Oxford Survey of Childhood Cancer found that X-rays of mothers, involving doses to the fetus of 10-20 mSv, resulted in a 40 percent increase in the cancer rate among children up to age 15.

In Germany, a recent study of 25 years of the national childhood cancer register showed that even the normal operation of nuclear power plants is associated with a more than doubling of the risk of leukemia for children under 5 years old living within 5 kilometers of a nuclear plant.

Increased risk was seen to more than 50 km away. This was much higher than expected, and highlights the particular vulnerability to radiation of children in and outside the womb.

In addition to exposure measured by typical external radiation counters, the children of Fukushima will also receive internal radiation from particles inhaled and lodged in their lungs, and taken in through contaminated food and water.

A number of radioactive substances are concentrated up the food chain and in people. As a parent, as a physician, the decision to allow the children of Fukushima to be exposed to such injurious levels of radiation is an unacceptable abrogation of the responsibility of care and custodianship for our children and future generations.

(Tilman Ruff is chair of the International Campaign to Abolish Nuclear Weapons and associate professor at the Nossal Institute for Global Health at the University of Melbourne, Australia.)

==Kyodo

@elainekirk Is this helpful for your Pu/MOX research ? "Japan's Plutonium Utilization Plans" www.cnic.jp

Nothing from the Quince Fukubots, so far, or may I have missed anything from those? Thanks.

@Bobby1 Slowly and surely the daughters of the U family appear in the press. Now we see Americium and Curium. www.yomiuri.co.jp

[Thanks, @Reed. A while back there was a lot of buzz about elusive strontium data. Is there a burning reason why folks wanted to observe stontium? - Alblee]

@ALBLEE There was a brief video from about 2 days ago, have you seen that one?

[Yes, @Nancy. I was thinking aloud that there would be at least one flyby daily if only for continuing surveillance purposes.]

We can order Digital Globe images, they are quite expensive though, IIRC in the hundreds of dollars per image.

@ALBLEE You do have a way with words, heheh. Yes, there are two main reasons to search for the isotopes. One, we can see if there's been a release of material that will cause manifold health risks for years into the future, and two, by doing so one can calculate source terms and timings of the isotope's creation, release, and dispersal.

Fukushima Residents Seek Answers Amid Mixed Signals From Media, TEPCO and Government. Report from the Radiation Exclusion Zone japanfocus.org

@Debra Beckham So if they scrape the soil now so they can use the schools. What happens if there is another release and more contamination, just scrape down more?

[Bingo, like when a storm or typhoon churns up things quite a bit. - Alblee]

they are on youtube nuclear ginza it is about how people are treated in the nuclear industry very interseting, its a half hour documentary.

@Nancy They can't scrape the buildings, the plants, the playground equipment, they can't get every grain, into every nook and cranny. At the way things are looking, there will probably be more raining down on them.