reply to post by BobAthome
There are People who buy a Alu-Can of cold Coke from a Vending Machine
when they are thirsty and there are People who prepare Green-Tea
well in advance!
No, Frogs are as far as i remember in the last Group of "Mutations in Animals",
anyway the Contamination of that specific Place is very low and in a few Years
gone when everything goes well in Daiichi!
As i wrote already many Times there are Places even 5 Km away from the Plant
where the Contamination was under 1.Milli-Sievert/ Year (less than ca. 0.21 micro-Sievert/Hour)edit on 29-11-2013 by Human0815 because: add info
Natural strontium is nonradioactive and nontoxic, but 90Sr is a radioactivity hazard. 90Sr undergoes β− decay with a half-life of 28.79 years and a decay energy of 0.546 MeV distributed to an electron, an anti-neutrino, and the yttrium isotope 90Y, which in turn undergoes β− decay with half-life of 64 hours and decay energy 2.28 MeV distributed to an electron, an anti-neutrino, and 90Zr (zirconium), which is stable.
Note that 90Sr/Y is almost a pure beta particle source; the gamma photon emission from the decay of 90Y is so infrequent that it can normally be ignored.
Decontamination near the Fukushima Daiichi plant is progressing more efficiently, with convergence on measures that will support a return to evacuated areas. An IAEA team encouraged experts to communicate that radiation dose rates below 20 mSv per year are acceptable.
During the accident in March 2011 some 160,000 people were evacuated from an area within 20 kilometres of Fukushima Daiichi as well as zone to the northwest. The majority are yet to return to their home towns, although most have been able to make daylight visits to maintain property. The government has surveyed each evacuated municipality, estimating the dose rates resulting from the contamination and characterising their readiness for return to normality.
Several evacuated municipalities near Fukushima Daiichi have already been classified as 'ready to return' - meaning they have a calculated doses rate of 20 mSv per year or less. However, this is based on a generic formula that assumes a person spends 8 hours outside with no protection, and the rest of the time inside. In fact, the formula has been shown to significantly overestimate individual doses, due to different amounts of time spent outdoors and because people will readily modify their daily routines when given advice on how to reduce their radiation dose. In 22 towns across Fukushima prefecture a study of 77,400 people recorded individual doses some three to seven times less than those predicted by the generic formula.
"There needs to be a continued movement towards the use of individual doses, as measured by personal dosimeters," said the IAEA. This would support planning for resettlement, and can also reassure people in the wider prefecture - particularly parents of small children.