It's not my place to evaluate which method of calculating the exposure was correct. Just pointing out, that 1 mSv is a rather small amount of radiation. The smallest amount of radiation where one sees some indications of an increase in cancer risk is at 50-100 mSv [1].

I'm not arguing either way whether this should have an impact on any payments. Putting the threshold for compensation at 1 mSv is very conservative and will lead to the payment of compensation for many cancers that weren't caused by radiation. Which, again, is fine by me because I do believe that very little interest was paid to the protection of the neighboring populations.

[1] Pretty good summary: https://www.pnas.org/content/100/24/13761