Actuarial comparison
The argument
Because published risk assessments typically put core-damage frequencies at one in 10,000 to one in 100,000 reactor-years or lower, while core-damage accidents have in fact occurred at a rate on the order of one per few thousand reactor-years, the observed rate exceeds the predicted range by roughly an order of magnitude or more, which is what the claim asserts.
Does it work?
Not yet evaluated.
Premises
- UnassessedNo current assessment. Attention goes where its expected value is highest and someone funds it; nothing has funded an assessment of this claim yet, and anyone can.constitution →Published probabilistic risk assessments for nuclear power plants typically estimated core-damage frequencies of about one in 10,000 to one in 100,000 reactor-years or lower
- VerifiedThe evidence, examined directly, establishes the claim.constitution →Core-damage accidents in commercial nuclear reactors have occurred historically at a rate on the order of one per few thousand reactor-years
Where it is made
Passages where sources make, criticize or mention this argument. They record where it appears, not how strong it is, and none has precedence over another.
No source is recorded as making it.
Earlier ratings
- Jul 29, 2026
The inference is a straightforward numerical comparison and goes through if both premises hold. Both are well grounded: the range of published PRA estimates is documented and effectively uncontested, and the observed rate of one per few thousand reactor-years is robust to the disputed counting conventions, since every credible tally lands an order of magnitude or more above the predicted range. The argument's weight rests on the observed-rate premise, whose order of magnitude, not its exact value, is what the conclusion needs.