[en] A series of tests on submerged structures was performed in the Mark III ¹/₃ area scale Pressure Suppression Test Facility (PSTF) under simulated loss-of-coolant accident conditions. The tests utilized five cantilevered pipes as test targets, and were run using liquid blowdowns with two break sizes (2 ¹/₂'' and 1'' venturi). Bending moments on the targets were measured with strain gages during the entire blowdown transient. Although particular emphasis was placed on water jet and LOCA bubble loads, condensation and chugging loads were also examined