The numbers I can find on the cost of the Fukushima Daiichi accident are higher than that (and I wonder how reliable they are):
https://www.nytimes.com/2016/03/08/opinion/playing-pass-the-...
Japan’s leaders hope to restore for human habitation more than 100 cities, towns and villages scattered over hundreds of square miles. The government has allocated more than $15 billion for this work.
https://www.theguardian.com/environment/2017/jan/31/possible...
In December, the government said the estimated cost of decommissioning the plant and decontaminating the surrounding area, as well as paying compensation and storing radioactive waste, had risen to 21.5 trillion yen ($187bn), nearly double an estimate released in 2013.
(Interestingly, Wikipedia claims that the insurance policies that applied to Fukushima Daiichi specifically excluded accidents caused by earthquake/tsumani.)
Of course, with insufficient insurance coverage, when faced with a major accident the company owning the plant will just declare bankruptcy and leave the tax payer to pay for the mess.
So we have another case of "privatize the profits, socialize the losses", which IMHO is one of the biggest problems with nuclear energy, and is effectively a subsidy that keeps the price artificially low.