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A comment on Chinese Tokamak reaches over 100M degrees. Parent comment

Re:Chinese Tokamak reaches over 100M degrees by red75prime on Wednesday November 14, 2018 @03:57AM (#18448507)
It is low-backgroud steel([0]), not no-backbround steel. Potassium-40, for example, is a naturally occurring radioisotope. See Banana equivalent dose ([1]).

[0]: https://en.wikipedia.org/wiki/Low-background_steel

[1]: https://en.wikipedia.org/wiki/Banana_equivalent_dose

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Re:Chinese Tokamak reaches over 100M degrees by consp on Wednesday November 14, 2018 @04:45AM (#18448682)
To add: C-14, Al-26, Cl-36, Ca-41, Ca-48, V-50 and more in trace quantities can be present.

Try pointing a Geiger counter at a brick or ever better plaster wall and be surprised about the amount of radiation you get during the day.

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