It looks like the top-end estimate is that the Fukushima disaster may have caused up to 500 additional total lifetime deaths from cancer. Roughly 23,000 people per year died of diseases attributed to coal power plants in the United States alone from 1999-2020.
Edit: Changed "linked to" to "attributed to", because this is the estimated count of people who would not have died of disease if coal power plants were not running.
500 deaths at $12M per life is $6B. This is a small fraction of the total cost of Fukushima.
People say LNT overestimates deaths, but what they don't realize is that even if you take LNT at face value the cost of deaths from a nuclear accident isn't really that high. A regulatory regime where reactor operators that have accidents are charged the inferred cost of the expected deaths could work.
Edit: Changed "linked to" to "attributed to", because this is the estimated count of people who would not have died of disease if coal power plants were not running.