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 |