The Future of Nuclear = Small, Mobile, Microreactors – Radiant [video]

This is pretty cool, but I have questions.

1) In their 4MW plan, using 4 reactors in a tennis court area, what level of kinetic attack can this withstand? Can a fuel tanker truck run into it? Quadcopter with an RPG round? The reason that I ask this is because they talked about deploying to war zones.

2) What is the refueling cycle? 1 year? How fissile is the waste compared to LWR? Is the waste stored onsite for a long time, like in LWR?