Unsurprisingly, as per your source the figures for 600 billion for Chernobyl are not in the form of actual spending: this figure comes in the form of estimated

Unsurprisingly, as per your source the figures for 600 billion for Chernobyl are not in the form of actual spending: this figure comes in the form of estimated economic impact. This is a drastically different figure, one that encompasses things far beyond actual spending. Fossil fuels have an estimated economic impact of over a trillion dollars every year. Figures for estimated economic impact are also hugely variable since study authors can apply analysis that includes more and more layers of indirection. The costs for Fukushima are also not bearing out as you seem to claim: the bulk of that 82 billion came in the form of disaster relief (more than half), land remediation. and decommissioning the plant. Storage of the waste water from continued maintenance of the failed reactor is a slim minority less than 3%. So I'm not sure why you seem to be under the impression that there will be so much more expense, when the most expensive steps - namely resettlement and cleanup - have already been completed. 10 trillion yen out of the 12 trillion are for disaster relief payments and decontamination - both of which are already done. You have demonstrated the ability to perform division when you calculate that 82 billion over 11 years works out to about 7.5 billion per year - but you're missing the fact that this spending was heavily frontloaded during the immediate disaster response.