This material is explosion resistant, and is a good choice for building a Creeper/TNT safe bunker.
Reinforced Stone can withstand a nuclear explosion, if you build a wall with at least 4 blocks. It can also be used to craft the Reinforced Door.
A single block-thick wall will mitigate most reactor explosions and most of a nuclear blast, while a double block thick wall will completely neutralize any nuclear blast. (IC2v1.9)
- A single block wall (57 blocks total) consists of a 5x5x3 foundation with 3x3x2 core space. This does not include a ceiling, assuming the top of the reactor opens into clear sky.
- A double block wall (178 blocks total) consists of a 7x7x4 foundation with a 3x3x2 core. This also does not include a ceiling.