Brian H wrote: Yeah, well, that would cut it down to 1/2^27, or about 1/130,000,000. Should be enough.
… except that it won’t be less-than-background in the first hour should an extreme accident vent the core on a road. And the same applies even more so for aircraft applications.
But, annoying as it can be for the prospects of extreme hovercraft sports, that “less-than-background at all times” motif of Lerner-hakase is going to be very good insulation if a justifiably angry public has to be informed that a spent fuel pool in someone’s fission plant has just gone walkies on its own…