The object of the work described in this report was to adapt the laboratory procedures for precipitating and hydrofluorinating plutonium (IV) oxalate to plant equipment on 160 and 350 gram scale. This adaptation was done by making minor process changes in concentration, digestion time, rate of chemical addition, etc.

Redox effluent for production was first processed in the 231 Building on February 4, 1952. Samples of process streams were taken after each purification step to evaluate the adequacy of purification processes in,the 231 and 234-5 Buildings and to provide close control of this material. Data regarding pile residence histories, radiation surveys of ``Sample Cans``, reduction yields, C/Q values, and product purity after purification steps were accumulated and are presented in this report to establish preliminary data which may be used to evaluate future process changes.

The following are the maximum recommended design pressures when using 2S-H14-72S clad process tubes: (a) long duration (Operating Pressure) - 500 psi at tube entry. (b) Short duration (Emergency Pressure) - 600 psi at any point along tube length. (c) If several distoration of some tubes (as of fringe tubes in older piles) is expected the operating pressure limit of the tubes in question should be lowered to compensate for the expected distortion.

This report details the behavior of water used in nuclear reactors. Detailed studies concerning water quality and water chemistry are reported.