Japan is right. Those chemical elements will decay out much faster in digestion of ocean organisms, and the next generations will be fine. Those elements left over at this point in time also do far less damage, because they decay much more slowly when not processed through fish, etc.
We’ve neglected proper studies and allowed creative stories from the left to mislead us for too long (examples, the hysterical propaganda in “The Day After,” the “half life” of this or that).
You don’t have a clue about radioactive decay rates.
this is not a problem because of the volume of water in the worlds oceans, not because of your cockamamie theory.