[PaulHoule]

Yep.

A supercritical CO2 turbine runs at 1000+ psi but if the pipes broke and the CO2 sprayed out into that salt, you might get an overpressure around 10 psi in a not-too-big confinement because the volume of working fluid is tiny.

[pfdietz]

You would not even run the CO2 plumbing into the containment building. There would be a secondary salt loop leaving that building.