Don't forget that those casks are really heavy. If you launch the "waste" into space in them you'll be launching a lot more mass than just the 30kt. I don't kno

Don't forget that those casks are really heavy. If you launch the "waste" into space in them you'll be launching a lot more mass than just the 30kt. I don't know the exact ratio between cask mass and waste mass, but it could easily be 10:1. Also, I'll repeat that throwing away valuable nuclear material just because it's called a "waste" product is stupid. Paying a lot of money to throw it into space is even dumber.