Demanding "fail-proof" is FUD. Even a windmill can fall over and kill someone. What is good design and planning is "fail-safe" which is to say that any failure

Demanding "fail-proof" is FUD. Even a windmill can fall over and kill someone. What is good design and planning is "fail-safe" which is to say that any failure mode means the plant shuts down gracefully and with as little damage as possible. In the case of windmills, that means sticking them in fields or on open water where people aren't likely to be around. For nuclear plants, that means the whole thing is self contained and designed to stop reacting without direct human control. Every failure mode ends in the nuclear reaction ending with the radioactive materials contained.