They'll likely have to answer the airplane impact question directly during licensing. A combination of steel mesh structures and below-grade can help, as can th

They'll likely have to answer the airplane impact question directly during licensing. A combination of steel mesh structures and below-grade can help, as can the fact that this reactor is very low power and low burnup (meaning the radiological source term will be fairly low for worst-case). But it will still be important and non-trivial to physically protect the plant. This is a fundamental challenge for small reactors, and is part of the reason reactors got big in the first place.