Japan crisis - the worlds economic outlook?

ninky_2

Really2 wrote: »

it means 50% will have changed within 0-30 years with the rate getting faster towards the 30 year period most would be changed after 30 years.

.

no you are wrong.

the half life of a radio isotope is the time it takes for one half of it to degrade into a more stable material.

so after 30 years half of the cesium will be barium. after sixty years 75 percent of the original amount will be barium. after ninety years you still have 12.5 percent of the original amount remaining as cesium 137.

ninky_2

Really2 wrote: »

Food stuffs from japan not all food stuffs, they have not increased the safe dosage in any EU food or for any other country.
.

because there is no need to increase the limits from any other country. no other foodstuffs are currently at risk of failing the limits.

ninky_2

Really2 wrote: »

PS any actual proof of this other than a blog? it is not reported in an news wires, just blogs.

it's a bit google translate but here is a new report. if you are good with languages you can read the original from the link.

http://economicsnewspaper.com/policy/german/expert-relaxed-radiation-exposure-limits-for-food-7251.html

Really2

ninky wrote: »

no you are wrong.

the half life of a radio isotope is the time it takes for one half of it to degrade into a more stable material.

so after 30 years half of the cesium will be barium. after sixty years 75 percent of the original amount will be barium. after ninety years you still have 12.5 percent of the original amount remaining as cesium 137.

So how is it wrong?

Really2 wrote: »

it means 50% will have changed within 0-30 years with the rate getting faster towards the 30 year period most would be changed after 30 years.

It is on a per atom basis so if you had 100 cesium 137 atoms after 30 years you would expect half to be Barium 137 (stable isotope)
The deacay starts from day 1 it does not all happen on 30 years?
Half life is a linear description to evaluate a random act, it is a "as close" as estimate.
If 50% changes by 30 years how can "most would have changed after 30 years" be wrong? I make anything over 50% as most!

1984ReturnsForReal_2

ninky wrote: »

if radiation is so safe why the massive exclusion zone? are they just misguided?

Because they are starting to prepare for a worsening scenario .

ninky_2

Really2 wrote: »

If 50% changes by 30 years how can "most would have changed after 30 years" be wrong? I make anything over 50% as most!

i don't. perhaps i'm more of a glass half full thinker.

sounds like the rational behind the conservatives 'winning' the election.

Really2

ninky wrote: »

i don't. perhaps i'm more of a glass half full thinker.

sounds like the rational behind the conservatives 'winning' the election.

If your glass is 51% full, it is more full than empty.

I understand the fear of this and have watched it daily. But apart from a full meltdown the effect of this disaster (and it is a disaster) will be mainly focused around the japan area. But in terms of coverage of people due to the population density of Japan the amount of radiation released could effect more people even though it is only 20% of what was released by Chernobyl.

I was not aware the conservatives won the election?

Generali

ninky wrote: »

it's a bit google translate but here is a new report. if you are good with languages you can read the original from the link.

http://economicsnewspaper.com/policy/german/expert-relaxed-radiation-exposure-limits-for-food-7251.html

In the link the EU Commission appear to claim to have tightened not loosened controls surrounding radioactive material in Japanese food:

...an existing regulation for 25 years for the case of nuclear crisis has been activated, according to a spokesman [for the EU Commission] on Wednesday. It provides for find limits and tighter controls on imports from Japan.

According to a Food Watch employee, "The European Commission operates quibble" so perhaps that's best taken with a pinch of sodium chloride.

Really2

ninky wrote: »

it's a bit google translate but here is a new report. if you are good with languages you can read the original from the link.

http://economicsnewspaper.com/policy/german/expert-relaxed-radiation-exposure-limits-for-food-7251.html

As gen said they have tightened not relaxed. On my Fukushima daily google.
http://www.google.com/hostednews/afp/article/ALeqM5h2mf6UGDr93K3zUymmKPuBfALAaA?docId=CNG.692381365d745fc505df40c97673c9ec.241

The 27-nation bloc wants its current radiation limits to be brought in line with those of Japan in the cases of caesium-134 and caesium-137, Dalli's spokesman Frederic Vincent told AFP.
That would lower the level of permissible contamination to 500 becquerels per kilogramme from 1,250 becquerels per kilogramme at present.

Looks like the blogs got it the wrong way round.

ninky_2

seems to be some confusing reporting because according to this they were set at 600 a kg in 2008 http://coto2.wordpress.com/2011/04/04/eu-ups-cesium-safety-level/....click the link to previous limits at the bottom.