The suppression chamber (torus) on the Mark/1 Containment is assumed to have a 112’ 8” major diameter, a 30’ 8”chamber diameter and contains water to a depth of 14’ 0”. Based on these dimensions:

Total torus volume 258,222 ft3
Water volume 122470 ft3
Air space volume 135752 ft3
Assumed initial temperature 100°F
Assumed initial air space pressure 19 psia