Since when does free insurance stretch the definition of subsidy? Clean up costs in Fukushima will total about $1 trillion. Probability of a core melt acciden

Since when does free insurance stretch the definition of subsidy? Clean up costs in Fukushima will total about $1 trillion. Probability of a core melt accident in 1 year or reactor operation is apparently 1 in 3704. Insuring for that much with zero profit margin would be $269 million per year per plant. That's about 1.5x-2x the cost of operating a nuclear plant. It's a lot of money to handwave away.