The original CMX hydraulic data for the Mark 22 assembly, obtained by L.W. Ridenhour in 1972, is analyzed and documented. Comparisons are made to Ridenhour's working notebooks and summary document, and to the Mark 22 hydraulics manual. Several errors in these documents are corrected. Correlations are given in a form suitable for revisions to the hydraulics manual. The experimental setup and measurements are briefly described, and the original data is compiled in the appendix to this report. An error in the recorded length between channel pressure taps was found in Ridenhour's notebook. This error impacts the channel pressure drop correlations obtained by Ridenhour and used in the hydraulics manual. The hydraulics of the two purge channels are analyzed based on the geometry of the orifices and on the limited data available. The limited data is shown to be in reasonable agreement with accepted orifice correlations. Purge channel correlations are given, and the purge channel flow splits are shown to be about 1.5% of the total flow.

This paper presents a recently modified verion of the 2-D DART code designed to simulate the behavior of a beam of charged particles whose paths are affected by electric and magnetic fields. This code was originally used to design laboratory-scale and full-scale beam direct converters. Since then, its utility has been expanded to allow more general applications. The simulation technique includes space charge, secondary electron effects, and neutral gas ionization. Calculations of electrode placement and energy conversion efficiency are described. Basic operation procedures are given including sample input files and output. 7 refs., 18 figs.

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This report discusses the lists of those new issue briefs that have been added to the major issues file since the last issue of the CRS update.

This report discusses risk assessment as a analytic process by which the nature and magnitude of risk is identified.

Two portions from a single sample of Hanford scrap plutonium oxide (12% Pu{sup 240}), account HRA-40, were dissolved in the Separations Technology Laboratory as requested. Test conditions, including oxide-to-solvent ratio were very similar to those used in the process. Both test portions dissolved quite readily in 14M HNO{sub 3}-0.2 M HF in a boiling water bath. Efficient agitation of the oxide in the solvent was instrumental in ensuring quick, thorough dissolution.