Tulse wrote: To be fair, as far as I know currently nuclear plants don’t figure in permanent disposal costs in their bills to consumers. And my guess is that one major market for these units is outside the US, where issues of insurance may be less of a concern. (I’m also not clear that a sealed unit would have more insurability problems than a conventional plant.)

Exactly, that’s the point. Nucluear fission plants don’t include these costs in their calculation. Thus it’s much more expensive, than commonly voiced. You pay the costs by tax. Or your children pay them with their health. Either way.