I went out to the story and read it. Not a typo.
They said ‘compact FUSION reactor’ uses deuterium-tritium - for now. This one will produce some waste. Future ones using hydrogen won’t.
It will also produce copious quantities of neutrons which will render anything in the vicinity with a significant neutron capture cross section seriously radioactive, and damage the dtructure of the fusion generator istself fairly quickly. 2D + 3T = 4He + a neutron
Deuterium and tritium are both forms of hydrogen. Tritium is radioactive, however, and using it in a reactor will spread the radiation to other components. The “different fuel” mentioned is probably helium-3, which can be used in place of tritium and is non-radioactive. The problem is that it’s extremely rare and can’t be made artificially like tritium can. The movie “Moon” was about harvesting helium-3 from the moon because there’s more of it there.