Risk of another Chernobyl or Fukushima type accident plausible, experts say

As reported by the University of Sussex:

Biggest-ever statistical analysis of historical accidents suggests that nuclear power is an underappreciated extreme risk and that major changes will be needed to prevent future disasters

A team of risk experts who have carried out the biggest-ever analysis of nuclear accidents warn that the next disaster on the scale of Chernobyl or Fukushima may happen much sooner than the public realizes.

Researchers at the University of Sussex, in England, and ETH Zurich, in Switzerland, have analysed more than 200 nuclear accidents, and – estimating and controlling for effects of industry responses to previous disasters – provide a grim assessment of the risk of nuclear power.

Their worrying conclusion is that, while nuclear accidents have substantially decreased in frequency, this has been accomplished by the suppression of moderate-to-large events.  They estimate that Fukushima- and Chernobyl-scale disasters are still more likely than not once or twice per century, and that accidents on the scale of the 1979 meltdown at Three Mile Island in the USA (a damage cost of about 10 Billion USD) are more likely than not to occur every 10-20 years...

The 15 most costly nuclear events analysed by the team are:

1. Chernobyl, Ukraine (1986) - $259 billion
2. Fukushima, Japan (2011) - $166 billion
3. Tsuruga, Japan (1995) - $15.5 billion
4. TMI, Pennsylvania, USA (1979) - $11 billion
5. Beloyarsk, USSR (1977) - $3.5 billion
6. Sellafield, UK (1969) - $2.5 billion
7. Athens, Alabama, USA (1985) - $2.1 billion
8. Jaslovske Bohunice, Czechoslovakia (1977) - $2 billion
9. Sellafield, UK (1968) - $1.9 billion
10. Sellafield, UK (1971) – $1.3 billion
11. Plymouth, Massachusetts, USA (1986) - $1.2 billion
12. Chapelcross, UK (1967) - $1.1 billion
13. Chernobyl, Ukraine (1982) - $1.1 billion
14. Pickering, Canada (1983) - $1 billion
15. Sellafield, UK (1973) - $1 billion

[Here is a link to the technical study itself, by Wheatley, Sovacool, and Sornette, "Of Disasters and Dragon Kings: A Statistical Analysis of Nuclear Power Incidents & Accidents," April 10, 2015.]