Progress is reported in a limited study to measure the soil-moisture relationships at the Hanford site. Some of the tests have been conducted or are in progress using soil samples from a site located at the 32-49 Hanford Coordinates. Sections are included on original studies on well 32-49A, tritium assays of soil samples from wells at 32-49 coordinates, installation of sensors to the water table, and soil-moisture models. (JRD)

The combined effects of local power distribution and grid spacers on CHF were experimentally evaluated using an electrically heated 16 rod bundle simulation of a typical BWR fuel assembly. The single and two-phase hydraulic behavior of the test assembly was also evaluated. Data were obtained over a range of pressures (1000-1500 psia), mass velocities (0.5 x 10{sup 6} - 2.0 x 10{sup 6} lb/hr ft{sup 2}), and bundle-average exit qualities (0 - .40). CHF consistently occurred upstream of the last grid spacer indicating that the grid spacer improved coolant mixing downstream of it. CHF results compared well with other rod bundle CHF data available in the literature. Rod bundle two-phase pressure losses were accurately predicted via the COBRA code using the Homogeneous two-phase model in conjunction with empirically established single-phase hydraulic correlations for the bundle components.

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