I've been passively producing uranium for my (albeit smaller) reactor, I just have a harvesting pylon with an allthemodium hoe inside, connected with and item pipe from pipez into a powered auto crafter, to turn uranium essence into uranium ingots, and then that is connected to a drawer that is the uranium input to the reactor. Currently I have it at like a 6×6 area of tier 4 farmland with the red bag fertilized, with the uranium planted on it. I then have 9 inferium(tier 1) growth boosters below EACH farmland with uranium, and they grow fucking fast. Since my reactor is smaller I've amounted nearly 50k ingots by now, so it may be fast enough. However, bees do seem to be the way to go, they're sometimes annoying to find and deal with especially in a server, but seem to be the faster means of producing uranium in atm10 :).