Curious how recombiners would work in an inerted containment? If they are producing steam, they are combining hydrogen with oxygen. If there is very little oxygen in an inerted containment, there is nothing to combine it with unless oxygen in introduced into the process. I'm sure someone smarter than I has thought of this, just trying to figure out how they work.
Hmmm, Well if you have a loss of coolant accident that pressurized the drywell the nitrogen in the drywell is displaced by steam and the nitrogen would move through the down comers and wind up in the torus. Prolonged radiolytic decomposition of water creates H2 and O2 thereby increasing the O2 content in the drywell. Zirc water reaction also creates H2, so there you go. No LOCA? Process would be the same but the steam/H2-O2 mixture goes through RCIC or HPCI systems along with SRV's into the torus and eventually the torus air space. As pressure builds up in the torus due heat and gas buildup it is relieved to the drywell, and it would work similarly.
Of course low O2 is the point, if oxygen is low the process would not work. But then it would not matter since the H2 would not be able to explode [deflagration]
The problem is that with high containment pressure, that they had, either venting or through leakage out of the drywell this h2 can and will escape, then you have the O2...and the explosion.
XF