Empirical Risk Analysis of Severe Reactor Accidents in Nuclear Power Plants after Fukushima

Table 2

Worldwide number 𝑅_𝑊 of reactors at the time of accident, cumulative reactor years since 1967 and hazard for NPP reactor accidents with INES level ≥5 (95% CI in brackets are calculated only for the latest value based on three events).

Reactor location	Number of reactors 𝑅𝑊	Cum. reactor years; 𝐶𝑊 since 1967	Hazard ℎ𝑊   CI; (per 10^4 RY)
Three Mile Island	133	4754	2.1
Chornobyl	302	9267	2.2
Fukushima	441	14097	2.1
			(0.44; 6.2)