Marviken Critical Flow Test Program

In the Marviken Full-Scale Critical Flow Test Program, a multinational project, 27 tests were conducted to obtain critical mass flow data for short nozzle geometries (200 to 509 mm in diameter with length-to-diameter ratios from 0.3 to 3.7) comparable to pipe sizes present in world nuclear reactor stations. The nozzle inlet pressures ranged from 5.2 to 2.6 MPa with the fluid subcooled as much as 50/sup 0/C to low-quality saturation. A maximum nozzle mass flow rate of 14 Mg/s was measured. Typical data are presented and discussed in this article. These data provide an important link between the previously available small-scale critical mass flow rate data and existing operational hardware.