Fukushima’s doses tallied

[PamW]

22. Yes - marginal increases

Many laboratories, from national laboratories to university laboratories have studied the radiation and done spectroscopy on it.

If you do spectroscopy, measuring the energy of the particles, you can tell which isotopes are responsible for the radiation and how much of the radiation that isotope is responsible for, because each isotope has its own energy "signature".

When you do that you can learn how much of the radiation is due to radioisotopes from Fukushima like I-131 and Cs-137, and how much is due to natural radioisotopes made by Mother Nature such as C-14, K-40,...

When you do that, you find that the vast majority of the radioactivity and radiation is due to the natural radioisotopes, and that the Fukushima fission products are a marginal contributor. That's why the word marginal was used above.

PamW