It’s fine – water cooled reactors routinely discharge tritium in effluent produced in their everyday operation. Tepco has set a limit of 22 trillion becquerels per year from this scheme which is about a quarter of discharges from individual power plants in South Korea and China – and not even a rounding error for discharges from the reprocessing plant at Cap de la Hague in France:
[https://www.env.go.jp/en/chemi/rhm/basic-info/1st/06-03-09.html](https://www.env.go.jp/en/chemi/rhm/basic-info/1st/06-03-09.html)
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