It did so using technology developed in the 1950's and early 1960s. There were no high speed computers.
Hundreds of thousands of lives that would have been otherwise lost to air pollution over many decades were saved.
The United States at the peak of its nuclear power production has some of the lowest electricity prices in the world.
What happened? Why has what already happened become impossible?
For one thing, we built a generation of journalists who could not pass a simple an introductory college level science course.
The other is that we built a public who considers one death from radiation as a tragedy but doesn't give a flying fuck about 7 million air pollution deaths per year.
We will spend a billion dollars, ten billion dollars, so that any radiation leak that any uneducated asshole can imagine is impossible and not $200 to provide vaccinations to children who need them.
I really, really, really, really, really couldn't give a flying fuck about an article in a newspaper about the "cost" of nuclear power plants.
I would be really really really really interested if newspapers focused on the cost of 7 million air pollution deaths per year, the cost to future generations of abandoned fracking fields leaching unimaginable shit forever, the cost of destroying the planetary atmosphere.
Real world expectations?
Really?
What we should be expecting is what we are creating with our idiot selective attention. A reactor built in 1953 that was connected to the grid in 1954 in England, designed without access to high powered computers, with primitive knowledge of materials science, by people working literally with slide rules, ran until 2003 without a single loss of life.
You know what's not getting better? Thinking.
We are unbelievable asses that things like this are allowed to take place, that nuclear engineering programs are focused on non issues in so called nuclear waste, and that we have a penny pinching public that give not a fuck about poisoning the atmosphere forever because we, unlike our parents, are unwilling to pay for nuclear power plants that will be operating after we've been dead for well more than half a century. The nuclear power plants my parents generations built were gifts to mine. We have our heads too far up our asses to care about our children, and our grandchildren and their grandchildren.
History will not forgive us, nor should it.