A PRELIMINARY STUDY OF THE DYNAMICS OF SOLVENT EXTRACTION CASCADES. I. PROGRAM FOR DIGITAL AND ANALOG SIMULATION

Author: Updike, O. L.
Published: United States : [publisher not identified], 1959.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1959.
Physical Description: microopaque : positive ; 8 x 13 cm
Additional Creators: Whatley, M. E.

Availability

Finding items...

Summary

The dynamic behavior of solvent extraction systems is being studied. A generalized multistage cascade is the prototype for which mathematical models suitable for both digital and analog simulation are being developed. These can be "forced" by step, sinusoidal, random, or other perturbations to determine their transient performance. The chemical system considered is UO/sub 2/(NO/sub 3/) - HNO/sub 3/ - H/sub 2/O TBP-Amsco. The equations solved are of differencedifferential form, arising from the material balance requirements of the system: and at each point in the time location plane an equilibrium relation interconnects concentrations of the two distributed components. The digital model is built around tabulated values of flows and concentrations, held in the fast memory of the ORACLE. Stage by stage, these are updated by computation from data of adjacent stages and preceding instants, with periodic output of tabulated results. The principal subprograms are one representing the interphase equilibrium and one which, by successive approximations, solves simultaneously the equilibrium relations with the material balance constraints. The analog model, less advanced, depends considerably on the digital results. The dynamic relations are easy to program. The complicated algebra of the equilibrium equations, however, uses equipment prodigally and degrades accuracy. (auth)

Report Numbers

CF-59-9-47

Other Subject(s)

Collection

U.S. Atomic Energy Commission depository collection.

Note

NSA number: NSA-14-015681
OSTI Identifier 4138837
Research organization: Oak Ridge National Lab., Tenn..

View MARC record | catkey: 39681482