(no title)
mwidell | 3 months ago
"...began to fall in 1963, when the Partial Nuclear Test Ban Treaty was enacted, and by 2008 it had decreased to only 0.005 mSv/yr above natural levels. This has made special low-background steel no longer necessary for most radiation-sensitive uses, as new steel now has a low enough radioactive signature."
juvoly|3 months ago
actionfromafar|3 months ago
piker|3 months ago
huflungdung|3 months ago
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doe88|3 months ago