OTH If a CVN takes damage and a RADIOACTIVE 1200 psi pipe breaks then the entire ship is irradiated and the reactor scrams. So you end up with $12B radiation hazard floating helplessly and worthless. Sorry I am not staying on a 95,000 ton bio/radiologic hazard. Someone else can save that ship.
I was a conventional Machinist Mate. But If what I remember about any nuke plant is true the steam is not radioactive nor in any direct contact with the steam. The reactor is aa heating source like DFM is to a conventional boiler. In the case of a nuke though the reactor vessel is a closed unit meaning simply the steam generated for propulsion on the 1200 psi side is separate from the reactor core. It is not the same liquid. For propulsion and catapult steam it would be treated heated water converted to steam. I would say the pressure of liquid surrounding the rods no where near approaches that of the steam. Pressure/temperature ratios would be involved.
If the reactor gets damaged and goes berserk there is a protocol used to cool and retain the reactor core.
What I meant about abandoning a boiler room I will explain via PM. There are 2 boilers per MMR with 4 MMR's so yes the ship can fight. I wasn't saying abandon ship but rather the space. A major steam break is so loud it silences everything because it is above human hearing spectrum thus the space will sound quiet.