Reply To: General thought on old coal mines.

[zapkitty]

QuantumDot wrote: With Radiations Shield Technologies Demron it may be possible to remove a lot of the other shielding, maybe all of it for a blanket of the stuff, which claims to be able to stop alpha particles, beta particles, neutrons, x-rays, low energy gamma which is the harmful stuff; so it seems to cover everything you need, take up less space and less mass

http://www.radshield.com/

… but it’s as dense as lead and in the amounts needed for FF applications it would be as heavy as lead.

http://www.radshield.com/pdf/RST_Livermore_Summary.pdf

http://www.radshield.com/pdf/Lead_Equivalency.pdf

Demron’s advantages are its flexibility and the claimed non-toxicity and, in thicknesses under .5 mm, it outperforms lead of similar thickness by a rather surprising margin.

But at .5 mm thickness lead shields about as well… and an FF array will need somewhat more than a half millimeter of shielding 🙂