Type of hazard

Probability of occurrence

Extent of damage

Amount of knowledge

Adjusted coefficient of determination

Core meltdown

0.033

0.540***

0.000

0.337

Radiation leakage

0.079+

0.502***

−0.018

0.350

Radioactive water release

0.110**

0.494***

0.004

0.356

Failure of machinery and piping

0.020

0.573***

0.019

0.344

Fire at the site

0.011

0.496***

0.002

0.212