Letter: Neutron Shielding for Fallout Shelters
Hugh and Jim, I was recently reading a book on nuclear reactors. I learned that iron can be used in concrete to provide neutron shielding. The iron slows the fast neutrons down to thermal levels that can be easily absorbed in the concrete. I also mine my own gold. As a byproduct of my mining, I have buckets of magnetite and hematite iron ore sand. The magnetite ore I sell to a local blacksmith for making steel. The hematite I’ve found no use for until now. I can use this black sand in place of silica sand in the concrete …