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friendica (DFRN) - Link to source

Radiation

After reading fear porn claiming the west coast was being fried by radiation from Fukushima, I bought a Geiger counter so I could measure for myself.

Background radiation on any given day is measuring between .09-.11 microsieverts. This works out to 876 microsieverts a year which is about a hundred fold under the lowest dose associated with an increased risk of cancer.

Not really sure how this compares to normal background radiation. This is just outside of Seattle. But it certainly falls far short of being "fried".

This entry was edited (4 years ago)
in reply to Nanook

friendica (DFRN) - Link to source

BR 549 ☎

I once calculated that a cubic meter of seawater would have about 4000 Becquerels worth of potassium in it. not sure if that's right, or how to convert that figure to Sieverts or Grays or Curies.
that was inspired by a report that scientists had found 11 Bq/m³ of Cs-137 in a sample from Hawaii. it was likely from Fukushima, since Pacific weapons testing ceased sixty years ago..
I am pretty sure they needed some specialized equipment and several days of monitoring to find that signature -- 11 Bq against a background of ~4000 Bq.
Unknown parent

friendica (DFRN) - Link to source

Nanook

@BR 549 ☎ The unit I have has an actual Geiger Muller tube and a thin plastic case with a slotted back so anything can pass through to the tube. It is supposed to detect Alpha, Beta, Gamma, and X-rays though it claims to be most efficient at detecting Beta and Alpha. So it would seem not only can it detect them but it is most efficient at it. But it's kind of moot as Hanford is on the opposite side of the state and far to the south and so kind of kitti-corner and there is a mountain range that separates us. Portland is more fucked as they drink water from the Columbia that Hanford leaks into.
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