So what happens if the reactive armour of your internal bulkheads actually do react? Do you think this is a desirable situation?
In this sense the word 'reactive' is referring to the type of armour, and basically means it REACTS DIFFERENTLY depending on the type of weapon being used against it.
A real life example is armour for tanks. Modern tanks use various forms of reactive armour, it is often built in layers of different materials. Each layer has a specific job to do depending on the type of ammunition that is attempting to breach it. Modern weapons used against tanks have a variety of different types of ammunition to try to get through various armours:
AP - Armour Piercing, the basic original type - sloped armour helped reduce penetrative abilities, first seen on Russian T34
APDS - Armour Piercing Discarding Scabard, where a large bore gun fires a smaller diameter projectile - which then discards the 'scabard' that helped it fit the bore of the gun - thus causing less wind resistance and higher projectile speed thus more penetrating power over longer ranges
HESH - High Explosive Squash Head, doesn't penetrate, but squashes against and explodes on the outside causing shards of sharp metal to spall off the INSIDE of the steel layer and bounce around inside the tank, not good for occupants - layered Reactive armour helps prevent this happening as there are often at least 2 separated layers of steel armour, with a 'softer' layer between that absorbs the shards from the inside of the first layer ('softer' being a relative term!)
HEAT - High Explosive Anti Tank, partially penetrates, then explodes sending a stream of hot plasma in through the hole, again layered reactive armours can cut this down by dispersing the plasma within the layers, depending on material type within the layer
There are more these days that I forget right now, but you can see even with current armament there are different armours to cope with them. So in 3301 Reactive, Ablative, and other armour types will be developed far more!
