Process research progress report, April 1--30, 1948

Word was received that the Eimco filter has been shipped from the Salt Lake City plant. It is expected within two weeks or about May 10, 1948. In place of a float gauge referred to in the Process Research Progress Report, March 1--31, 1984, a Uehling Tank-O-Meter will be used on the chemical solution tanks for the W. D. Building. Word was also received that the steam ejector has been shipped. It can be expected within the next few days. This item will complete the equipment to be used for the removal of activity from the flue gases produced in the incinerator. Laboratory experiments using synthetic bismuth chloride solutions are considered as completed for the time being. The experiments have shown that good yields, and adherent deposits can be obtained from solutions containing 0.18 g. bismuth/ml. with a 7 N hydrochloric acid concentration, providing a diaphragm is inserted between the anode and cathode. Neither calcium chloride nor pyrogallol are necessary under the conditions mentioned above. Bismuth was plated from a production solution in Run EP-1 in which the activity has been reduced from 4.2 {times} 10{sup 7} c./min./ml. to 4. 2 {times} 10{sup 4} c./min./ml. A yield of 2.48 g./amp.-hr. was obtained. The deposit contained several large nodules which were easily rubbed off. A greater portion of the past month was taken up with the preparation of a exhibit for the Miamisburg Atomic Energy Show