I'm rather surprised that man-made reactors account for 1% of all neutrino flux, especially with only about 10% of world power production coming from nuclear po

I'm rather surprised that man-made reactors account for 1% of all neutrino flux, especially with only about 10% of world power production coming from nuclear power. Obviously reactors release neutrinos at a much higher rate than natural decay, but there is only about about 10^5 tons of uranium in the worlds reactors compared to around 10^15 tons in the earth, and there are a lot more radioactive elements in Earth than just uranium.