[pfdietz]

My point is: even small leaks (in percentage terms) will result in much larger releases from LWRs. And tritium promises to be very difficult to contain, as it diffuses through a wide variety of materials. For example, it diffuses through polymer seals. Materials of a reactor will become saturated with it, providing a substantial source term in accidents.

Lurking over all this is the issue that loss of property value doesn't require anyone to actually prove tangible harm. The mere fact that property values were affected is enough for a tort.

[Retric]

The kind of releases you’re talking about is 8+ orders of magnitude smaller than in your prior example and again without burning it’s lighter than air and just going strait up. Right now T2 is ~$30,000 / gram hell even D is ~13,000x as much as hydrogen. This just isn’t the kind of thing you’d let escape in meaningful quantities in day to day operations.

When people talk about how safe fusion is they aren’t kidding, even breathing in a significant amount of T2 isn’t particularly dangerous radiologically as density is really low and you will quickly exhale it. Huge quantities would be a larger suffocation risks but then you’re talking multi million dollar accidents simply from lost fuel.