I have no idea about Nuclear Reactors although I've planned out all the protection for mine and such, but Big Reactors is super easy to get into. There's a list of all the best reactor combinations online, and all you really need to do is build following online set ups and import a steady supply of yellorium ingots into the reactor. Super easy, and unlike nuclear reactors, it doesn't explode.
Unlike IC2 Nuclear Reactors, you mean. Actual Nuclear Reactors tend to have less explosive qualities then space planes(reminds me, should play more KSP). IC2 Nuclear Reactors are bullshit anyway. Even the Atomic Science ones aren't much better(though at least they work as a reactor really does, generate steam to make power via turbines), as they still tend to explode if too hot.
What we call a "Meltdown" is really just that, things got too hot and started melting. The danger from a Meltdown isn't an explosion(though they have happened at times, usually because of bypassed safeties IIRC), it's uncontrolled nuclear radiation and heat. Even the Atomic Science reactors fail to understand a simple truth; water is a REALLY good neutron moderator. The reactor is covered with a couple cubic meters of water. If less then one meter of water between you and a spent fuel rod means you're safer from it's ionizing radiation then you are from the sun's when you get out of the water, going near a running nuclear reactor isn't dangerous. Might get a bit warm, but that's hardly a easy to show mechanic.
But you know what is weird(IMO) that's I've always skipped? End-game power armors. I usually go for a somewhat vanilla setup, honestly, in terms of protection. Maybe some Thaumium armor for actual fighting, AM2 Robes for going out and casting tons of spells, TC4 robes on occasion if I am worried about my Vis usage, I tend to have a MMPS set on hand, but it's lacking armor other then the apiarist bits(and maybe the lead platting for Atomic Science), occasionally other things as well(Mariculture is new to me, so I'm planing on making some of it's stuff as well). I even have a Gas Mask now. I have my pumpkin waiting for me by the door usually, waiting for me to put it on and kill some endermen.
But super armor? Ha ha, please. I turn off mob griefing usually, why should I be impossible to kill?