Ok, I have no idea what that is about. Who is demanding steel made before nuke tests? I would love to see the source and understand why?
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Supposedly there is radiation in ‘everything’ these days, due to nuke bombs and nuke tests.
So If I want to make a testing or measuring device for something that may be affected by background radiation, I might consider some ‘pre-nuke’ steel for the construction material.
Some ship compartments are welded shut when the ship is constructed. Like around the bow, maybe, where it is not useful space for storage or access.
For ships constructed before nukes, the air in these compartments has been extracted, examined, and used for scientific purposes.
I’ll bet if Bill Gates thought breathing non-nuke air would make him live longer, he would personally locate and extract every molecule of it on the face of the earth.
Low Background Steel — So Hot Right Now
https://hackaday.com/2017/03/27/low-background-steel-so-hot-right-now/
The nuclear age changed steel, and for decades we had to pay the price for it. The first tests of the atomic bomb were a milestone in many ways, and have left a mark in history and in the surface of the Earth. The level of background radiation in the air increased, and this had an effect on the production of steel, so that steel produced since 1945 has had elevated levels of radioactivity. This can be a problem for sensitive instruments, so there was a demand for steel called low background steel, which was made before the trinity tests.