MINPACK-1 is a pack of FORTRAN subprograms for the numerical solution of nonlinear equations and nonlinear least-squares problems. This report provides an overview of the algorithms and software in the package, and includes the documentation and program listings.

The results of an international comparison calculation of a large (1250 MWe) LMFBR benchmark model are presented and discussed. Eight reactor configurations were calculated. Parameters included with the comparison were: eigenvalue, k/sub infinity/, neutron balance data, breeding reaction rate ratios, reactivity worths, central control rod worth, regional sodium void reactivity, core Doppler and effective delayed neutron fraction. Ten countries participated in the comparison, and sixteen solutions were contributed. The discussion focuses on the variation in parameter values, the degree of consistency among the various parameters and solutions, and the identification of unexpected results. The results are displayed and discussed both by individual participants and by groupings of participants (e.g., results from adjusted data sets versus non-adjusted data sets).

A computational method is described for improving the accuracy of a given eigenvalue and its associated eigenvector, arrived at through a computation in a lower precision. The method to be described will increase the accuracy of the pair and do so at a relatively low cost. The technique used is similar to iterative refinement for the solution of a linear system; that is, through the factorization from the low-precision computation, an iterative algorithm is applied to increase the accuracy of the eigenpair. Extended precision arithmetic is used at critical points in the algorithm. The iterative algorithm requires O(n²) operations for each iteration.

This report covers the research and development activities of the program at Argonne National Laboratory (ANL) on lithium/iron sulfide batteries during the period October 1979-March 1980.

Report documenting the results of chemical analysis for 752 water and 843 sediment samples in the Gillette quadrangle, Wyoming. It includes an overview of the area, methods, data analysis, and evaluation.

This abbreviated data report presents results of groundwater and stream/surface sediment reconnaissance in the National Topographic Map Series (NTMS) Klamath Falls 1* x 2* Quadrangle.

"This report contains data for samples collected during a geochemical survey for uranium in the Cody National Topographic Map Series (NTMS) quadrangle, Wyoming, by the Los Alamos Scientific Laboratory (LASL) as part of the nationwide Hydrogeochemical and Stream Sediment Reconnaissance (HSSR). [...] Totals of 627 water and 1482 sediment samples were collected from 1529 locations at a nominal density of one location per 10 km2. Water samples were collected from streams, springs, and wells, and sediment samples were collected from streams and springs. Most samples were collected by two private contractors in the summers of 1976 and 1977" (p. 1).

"This report contains data collected during a geochemical survey for uranium in the Lewistown National Topographic Map Series (NTMS) quadrangle of Montana (Fig. 1) by the Los Alamos Scientific Laboratory (LASL) as part of the nationwide Hydrogeochemical and Stream Sediment Reconnaissance (HSSR). [...] The HSSR program is part of the United States Department of Energy's (DOE) National Uranium Resource Evaluation (NURE), which is designed to provide an improved estimate of the availability and economics of nuclear fuel resources and to make available to industry information for use in the development and production of uranium resources" (p. 1).

Report of elemental date from a Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) of the Hamilton National Topographic Map Series (NTMS) quadrangle in Montana/Idaho: "The HSSR is part of the United States Department of Energy's National Uranium Resource Evaluation (NURE), which is designed to provide improved estimates of the availability and economics of nuclear fuel resources and make available to industry information for use in the development and production of uranium resources" (p. 1).

Geothermal gradient map of the United States published by the Hot Dry Rock (HDR) Geothermal Program of the Department of Energy, showing geothermal gradient contours and color-coded based on temperature. The map also contains information about how the information for the map was compiled.

This report discusses uranium findings from a reconnaissance of the Gallup NTMS quadrangle through water, sediment, and water samples collected from streams, springs, and wells.

This report presents uranium and other elemental data resulting from the Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) of the Dubois NTMS quadrangle in Idaho and Montana. Totals of 1024 water samples and 1600 sediment samples were collected from 1669 locations in the Dubois quadrangle. Water samples were taken at streams, springs, and wells; sediment samples were collected from streams and springs.

SLIDES is a program which takes text and commands as input and prepares lettered slides and posters. When run on the time-sharing computer, the program can display its output on an interactive graphics terminal; in batch, it can direct its graphical output to a variety of plotters. The program uses DISSPLA graphical subroutines and standard ANL plotter subroutines. This report contains material written for the novice computer user, who should be able to produce useful slides or posters by following the examples. This report also serves as a complete reference for the SLIDES program.

Abstract: Prototype studies were conducted to measure pressures in the filling and emptying culvert system and to monitor various other parameters relating to the operation of the new John Hollis Bankhead Lock.

Data collected as part of a report on the Alliance Quadrangle in Nebraska and South Dakota including laboratory data on well water and stream sediments as well as field data.

Abstract: "The investigation reported herein describes surface and subsurface horizontal and vertical control, sampling, testing, laboratory testing, and analyses performed to determine the stability of a rock fill over fat clay deposits (South Fill) bordering the Hudson River at the West Point Military Academy, West Point, New York. The South Fill area in its present configuration was found to be stable and should remain stable provided use is limited to parking, athletic fields, and recreational areas. The report contains documentation of data collected since the monitoring program began in 1961."

Report documenting the results of chemical analysis for 422 water and 1552 sediment samples in the Vernal quadrangle, Utah/Colorado. It includes an overview of the area, methods, data analysis, and evaluation.

From abstract: This report examines and compares "the quality of water discharging from a strip-mined basin and a relatively unmined basin on the Cumberland Plateau in Tennessee." They determine that "the chemical and aesthetic quality of these waters will directly affect the chemical and aesthetic quality of the water flowing through a proposed national river and recreation area." It includes maps, graphs, and tables.

From abstract: This report evaluates "four dam-break flood-wave models [...] by using three field data sets and selected criteria of desirable features." It includes maps, graphs, and tables.

The model discussed in this report simulates recharge to, flow through, and discharge from the water-table aquifer representative of most of Chester County, Pennsylvania. It includes maps and graphs.

This report evaluates and describes the effects that strip mining the Anna S. Mine has on the water quality of Babb Creek in Pennsylvania. It includes maps, graphs, and tables.

This report presents a historical review of sediment-data collected for the San Francisco Bay systems in California from 1909 to 1966. It includes maps, graphs, tables, and a foreword.

The following report analyzes the aerial gamma ray and magnetic data taken from the West Point quadrangle in Mississippi and Alabama that was compiled in 1980. This report contains a detailed geologic summary, interpretation report, reduced scale copies of all maps and profiles, histograms, and statistical tables for the quadrangle.

The following report analyzes the aerial gamma ray and magnetic data taken from the El Dorado quadrangle in southern Arkansas that was compiled in 1980. This report contains a detailed geologic summary, interpretation report, reduced scale copies of all maps and profiles, histograms, and statistical tables for the quadrangle.