The LNT theory and the concept of collective dose make it relatively straightforward for assessors to determine the risk of exposure to radiation. There is only one problem with this currently accepted method: for the levels of radiation with which they are normally concerned, the results are meaningless - or worse.
As we have seen again and again, a wealth of hormesis data indicates not only that the current assessments of low-level dose-response are wrong in magnitude - but also in sign, with increasing amounts of radiation causing a decrease in harmful response. Would acknowledgement of this fact cause an upheaval in the risk business or what? Instead of "radiation = bad," they'd have to contend with "low radiation = good, but high radiation = bad" - and, moreover, have to determine when the "low and good" became "high and bad."
Risk analysts have about the same problems noted above for regulators - and for a very good reason: regulations are made from risk assessments.
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