Seems like Wikipedia is incorrect as well?
"The main purpose of the [Price–Anderson Nuclear Industries Indemnity] Act is to partially compensate the nuclear industry against liability claims arising from nuclear incidents [...]."
"By 1966 it had become apparent that the industry would still be unable to obtain adequate private insurance, so the act was extended until 1976. [...] In 2005 it was extended again through 2025 via the Energy Policy Act of 2005."
https://en.wikipedia.org/wiki/Price%E2%80%93Anderson_Nuclear...
That's a very confident and incorrect statement.
https://www.nrc.gov/reading-rm/doc-collections/fact-sheets/n...
As for accident vs costs of cleanup, like I said, new plants are designed not only to eliminate accidents from causing failures, but also such that if a failure happened, it would be completely contained.