George Washington refer the Washington Post on nuclear power economics: 
Nuclear power is a viable source for cheap energy only if it goes uninsured.
Governments that use nuclear energy are torn between the benefit of low-cost electricity and the risk of a nuclear catastrophe, which could total trillions of dollars and even bankrupt a country.
The bottom line is that it’s a gamble: Governments are hoping to dodge a one-off disaster while they accumulate small gains over the long-term.
The cost of a worst-case nuclear accident at a plant in Germany, for example, has been estimated to total as much as €7.6 trillion ($11 trillion), while the mandatory reactor insurance is only €2.5 billion.
“The €2.5 billion will be just enough to buy the stamps for the letters of condolence,” said Olav Hohmeyer, an economist at the University of Flensburg who is also a member of the German government’s environmental advisory body.
The situation in the U.S., Japan, China, France and other countries is similar.
In financial terms, nuclear incidents can be so devastating that the cost of full insurance would be so high as to make nuclear energy more expensive than fossil fuels.
Ultimately, the decision to keep insurance on nuclear plants to a minimum is a way of supporting the industry.
“Capping the insurance was a clear decision to provide a non-negligible subsidy to the technology,” Klaus Toepfer, a former German environment minister and longtime head of the United Nations Environment Programme (UNEP), said.
As previously noted:
In 1982, the House Committee on Interior and Insular Affairs received a secret report received from the Nuclear Regulatory Commission called "Calculation of Reactor Accident Consequences 2". ***Preface: I am not against nuclear power, solely the unsafe type we have today.
In that report and other reports by the NRC in the 1980s, it was estimated that there was a 50% chance of a nuclear meltdown within the next 20 years which would be so large that it would contaminate an area the size of the State of Pennsylvania, which would result in huge numbers of a fatalities, and which would cause damage in the hundreds of billions of dollars (in 1980s dollars).
