PROCESS DEVELOPMENT QUARTERLY REPORT. PART II. PILOT PLANT WORK
ABS>The stoicbiometric HNO/sub 3/ concentrations required to digest feed materials to 200g U/I, 3N excess acid are tabulated. Stoichiometrically the minimum HNO/sub 3/ concentration required to dissolve feed materials to flowsheet conditions flowsheet tests is presented. The sensitivity of the Weldon Spring TBP-extraction system to process flow rates is discussed. A series of pilot plant experiments are deserined for removing TBP from raffinate. Steam distillstion of the raffinate slurries proved to be more effective than washing with hexone in a pulse column. The flame fusion melting of UO/sub 2/ to form dense rods of relatively constant cross section continued. The rods and tubes which were extruded from micronized UO/sub 2/ had excellent surface quality and sintered densities greater than 98% of theoretical. Bomb center temperatures of 500 deg F and higher prior to fining, obtained by increasing the firing time, tended to produce low hydrogen U. A method for producing dingot U with an acceptable H/sub 2/ contact was developed. A number of solid additions to the UF/ sub 4/-Mg bomb charge were investigated. The tonnage of forged bar stock produced during this period is given. The variables affeeting diagot extrusion are discussed. An investigation of the dingot process is given. The determination of plant decontamination faetors for Ce/sup 3+/, Mg, and Al are presented. (W.L.H.)
- Research Organization:
- Mallinckrodt Chemical Works, St. Louis
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-14-017895
- OSTI ID:
- 4160329
- Report Number(s):
- MCW-1404
- Country of Publication:
- United States
- Language:
- English
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