Depends how much, and how well they disperse it. The oceans are actually fairly radioactive as is; there’s an estimated 4 billion tonnes of uranium dissolved in

Depends how much, and how well they disperse it. The oceans are actually fairly radioactive as is; there’s an estimated 4 billion tonnes of uranium dissolved into the oceans naturally. If you disperse the waste thoroughly, it wouldn’t realistically move the needle one iota, at least as a one time expedient. Concentrated in one spot, or as a regular disposal mechanism is not recommended, obviously.