"Reinforced concrete / glass can protect the surrounding from a nuclear explosion with the cost of itself. But only obsidian can fully absorb a nuclear explosion without damage."
-IC^2 Wiki (http://wiki.industrial-craft.net/index.php/Secret:Nuke)
My tests have shown that both the bomb, and the over-cooked reactor will destroy up to 2 layers of both reinfored concrete/glass and also obsidian. However, the wiki states that it should be contained. Is this a bug? Or are the blasts WAI?