[en] Pump performance data are presented for a 1/6 scale model jet pump in tests conducted at the LOFT Test Support Blowdown Facility. Steady-state subcooled pump characterization tests were performed over a wide range of forward and reverse flow conditions, both at room temperature, and at elevated temperature (555⁰K). Blowdown tests were also performed to obtain two-phase performance data in configurations simulating the flow patterns in the intact and broken loops of a BWR during a recirculation line break transient