i too had the problem MiggyMan had but just incase i will say this. make sure its up the top of the mod list, fixed it for me. :) good mod. i hated that the reactors could hold so much uranium. thank you for a nice mod.

hm works on my server. maybe you have turned the inventorysize higher? then the size should be multiplied by the number you have set.

I tried it, but it just doesn't work :(