Highlights of the Chemical Engineering (CEN) Division's activities during 1981 are presented. In this period, CEN conducted research and development in the following areas: rechargeable lithium-alloy/iron sulfide batteries for electric vehicles and other applications, aqueous batteries--improved lead-acid, nickel/zinc, and nickel/iron--for electric vehicles, as well as advanced lead-acid batteries for electric.-utility load leveling, energy-efficient industrial electrochemical processes, molten carbonate fuel cells for use by electric utilities, coal technology, mainly fluidized-bed combustion of coal in the presence of an SO2 sorbent of limestone, heat- and seed-recovery technology for open-cycle magnetohydrodynamic systems.

An analysis of the transient swelling rate of oxide fuel, based on fission-gas bubble conditions calculated with the FRAS3 code, has been developed and implemented in the code. The need for this capability arises in the coupling of the FRAS3 fission-gas analysis code to the FPIN fuel-pin mechanics code. An efficient means of closely coupling the calculations of swelling strains and stresses between the modules is required. The present analysis provides parameters that allow the FPIN calculation to proceed through a fairly large time step, using estimated swelling rates, to calculate the stresses. These stress values can then be applied in the FRAS3 detailed calculation to refine the swelling calculation, and to provide new values for the parameters to estimate the swelling in the next time step. The swelling rates were calculated for two representative transients and used to estimate swelling over a short time period for various stress levels.

From abstract: This report describes a method to estimate infiltration rates of soils for use in estimating runoff from small basins.

The following report presents results of geophysical interpretations on the Midnite-Sherwood Mine, a uranium mine along northeastern Washington.

From purpose and scope: The study on which this report is based began during 1975 in cooperation with the U.S. Bureau of Land Management as part of their Energy Mineral Rehabilitation Inventory and Analysis program. The study was directed toward determining hydrologic processes and their relation to other aspects of the environment in the Salt Wells Creek basin, and how this knowledge might be used in planning for the strip mining of coal.

Abstract: The input impedance of a probe antenna exciting a transverse electromagnetic (TEM) transmission line cell is formulated by a variational approach. The formulation also utilizes the results from a previous work on the field distribution inside a TEM cell excited by a vertical electrical Hertzian dipole. The final result of imoedance is shown to consist of two distinct terms, which are respectively contributed by the ordinary rectangular waveguide and the gap perturbation. Numerical results for both the real and imaginary parts of the impedance are given. The resistive part is found to be proportional to the square of the probe length, and the reactive part largely capacitive.

Nine maps that accompany a report that presents results of geophysical interpretations on the Midnite-Sherwood Mine, a uranium mine along northeastern Washington.

From Introduction: "The Baker Quadrangle, in east-central Oregon and west-central Idaho (Fig. 1), was evaluated to identify geologic environments and delineate areas that exhibit characteristics favorable for the occurrence of uranium deposits."

Appendices containing data on uranium availability in the Baker Quadrangle to accompany a report on U.S. uranium resources in Oregon and Idaho.

Results of reconnaissance surveys of the Charley River quadrangle to determine the likelihood of uranium deposits of the area, and additional information about the location and classification of any deposits.

Discussing the interpretation of aerial radiometrics in the Charley River Quadrangle

Discussing uranium occurrences in the Charley River Quadrangle

Discussing chemical analyses of the Charley River Quadrangle

Discussing occurrences of uranium in the Charley River Quadrangle

Discussing the interpretation of the geochemistry of the Charley River Quadrangle

Results of reconnaissance surveys of the Charlottesville quadrangle to determine the likelihood of uranium deposits of the area, and additional information about the location and classification of any deposits.

Discussing the locations of geochemical samples from the Charlottesville Quadrangle

Uranium occurrences in the Charlottesville Quadrangle

Discussing petrographic descriptions of the Charlottesville Quadrangle

Results of reconnaissance surveys of the Circle quadrangle to determine the likelihood of uranium deposits of the area, and additional information about the location and classification of any deposits.

Discussing uranium occurrences in the circle quadrangle

Discussing Chemical Analyses of the Circle Quadrangle

Discussing the interpretation of areal radiometrics in the Circle Quadrangle

Discussing the geochemistry of the