1. People are fallible and make mistakes.
2. There is no such thing as foolproof.
3. They are run by profit making organisations, with shareholders.
4. And Governments, with slim majorities.
5. We still can't (or won't spend the necessary cash to) turn off the old ones, no matter what anyone will tell you.
6. We still don't know what to do with the waste.
7. We have no idea of the long term consequences of the accidents that have already occurred.
8. Or the ones that inevitably must occur in the future.
So that's a "no" then.
And before anyone asks, I don't have a simple answer to the world energy crisis, but the OP didn't ask that, OK?