Mark I 1/5-scale boiling water reactor pressure suppression experiment quick-look report, for test numbers 3.3(a), 3.3(b), 3.4(a), and 3.4(b) performed on May 3, 1977

The tests conducted on the 1/5-scale BWR Mark I pressure suppression test facility simulate the three-dimensional transient conditions that are encountered in a wetwell pressure suppression system during a hypothetical loss-of-coolant accident (LOCA). Specifically, the nitrogen (N2)-driven air clearing phase tests discussed here were performed to obtain the air/water-induced dynamic vertical load function and to determine the response of a 900 sector of a 3600 torus structure