This report is an evaluation of solubility data for U, Np, Pu, Am, Tc, Ni and Zr compounds at ambient and elevated temperatures. We review the status of such data in light of the most recently reported experimental results. The focus is on the solid phases that may control solubilities under expected conditions in and near a potential nuclear waste repository at Yucca Mountain, Nevada. Solubility data or reliable predictions over the temperature range 20 to 150{degrees}C will be used in geochemical modeling studies of the Yucca Mountain Project [96PAL].

The objective if this program is to explore the potential application of a multistage column equipped with concentric draft- tubes (multistage column) for fine coal cleaning. The aim is to identify design parameters of the separation process. In the last quarter we conducted the gas holdup measurement which is an essential part of the hydrodynamic experiments for establishing a process model for engineering design and scale-up.