That's something I keep hearing, and also something I know to be false because I, you know, grew up near a nuclear power plant as it was being built and when it went online. I think I had field trip there and they had a cute cartoon atom. Anyway, according to the wikipedia, construction started on the Limerick nuke plant in 1974 - 37 years ago, not 40 - and it came online in 1986, which my advanced math tells me was 25 years ago.
