Queeba, we need you to use creative and delete 14 uranium blocks and give us 14 yellorium blocks. I wanted to make the yellorium blocks but it made Uranium blocks instead and the reactor doesn't accept them. D:
it was a long day of mining and this stuff happens
Even better, have queeba minetweak out the recipe for uranium blocks. Unless you are really getting into IC
2, it's only a good way to convert useful nuclear fuel into radiation poisoning that can last absolutely forever.
On a different mod pack, I once accidentally gave myself radiation poisoning (and screenshake) for over 45 minutes by converting yellorium into uranium.
EDIT: If you build a hazmat suit and a forge lexicon, you can uncompress the uranium blocks and use the forge lexicon's oredict transmutation ability to turn the refined uranium back into yellorium.
EDIT 2: You need to empower the lexicon to allow it to oredict things.