Quelle für La Hague und Sellafield:
https://web.archive.org/web/20230305215054/https://www.irsn.fr/EN/Research/publications-documentation/radionuclides-sheets/environment/Pages/Tritium-environment.aspx#2
Fukushima:
"As of April 2021, total amount of tritium stored in Fukushima Daiichi Nuclear Power Plant is about 860 terabecquerels (TBq). In comparison to the discharge of tritium from nuclear facilities across the world, see the table below. In 2018, La Hague reprocessing plant in France discharged 11,460 TBq of tritium, which is more than 13 times the total amount of tritium stored in Fukushima Daiichi Nuclear Power Plant"
30g/13 = 2,3 g
https://en.wikipedia.org/wiki/Discharge_of_radioactive_water_of_the_Fukushima_Daiichi_Nuclear_Power_Plant#Comparison_to_other_nuclear_facilitiesZum Vergleich:
Die oberidischen Atomtests haben ca. 650 kg Tritium erzeugt, die zum größten Teil in den Ozeanen gelandet sind. Davon sind immer noch ca 20 kg übrig.