The article you reference is a bit of a scare job, and you're conflating here on-site storage facilities with the actual operating reactor. Note that levels of tritium do not exceed limits in drinking water.

Because of nuclear physics (gamma energy levels, isotope half-life), it's very easy to identify when any contamination, even amounts that have no effect on human health, escape from a nuclear plant. Meanwhile, fossil fuel emissions (not just carbon-- soot and other particulates cause near-term health problems for humans) continue.