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Federal Environmental activities

Description: This report presents the Environmental activities of all units of the federal government except the supreme court and the committees of congress.
Date: June 1, 1972
Creator: Abbasi, Susan R.
Partner: UNT Libraries Government Documents Department
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Handbook of Mathematical Functions With Formulas, Graphs, and Mathematical Tables

Description: A handbook of mathematical functions that is designed to provide scientific investigations with a comprehensive and self-contained summary of the mathematical functions that arise in physical and engineering problems.
Date: December 1972
Creator: Abramowitz, Milton & Stegun, Irene A.
Partner: UNT Libraries Government Documents Department
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Flexible cubic spline interpolation

Description: This report describes a simple, efficient, and flexible program for cubic spline interpolation in one dimension, suitable for inclusion in the ANL Subroutine Library and in an interactive timesharing system. Most of the cubic spline programs already available either restrict the boundary conditions to knowledge of the first derivative at both end points, or require the second derivatives to vanish at these points. The program described here removes these restrictions and enables the user to adopt boundary conditions appropriate for his own problem. The advantage is demonstrated for the extreme case of interpolating the function x log (1/x), which has singularities in all its derivatives at x = 0.
Date: March 1, 1972
Creator: Abu-Shumays, I. K.
Partner: UNT Libraries Government Documents Department
open access

Flexible cubic spline interpolation

Description: This report describes a simple, efficient, and flexible program for cubic spline interpolation in one dimension, suitable for inclusion in the ANL Subroutine Library and in an interactive timesharing system. Most of the cubic spline programs already available either restrict the boundary conditions to knowledge of the first derivative at both end points, or require the second derivatives to vanish at these points. The program described here removes these restrictions and enables the user to adopt boundary conditions appropriate for his own problem. The advantage is demonstrated for the extreme case of interpolating the function x log (1/x), which has singularities in all its derivatives at x = 0.
Date: March 1, 1972
Creator: Abu-Shumays, I.K.
Partner: UNT Libraries Government Documents Department
open access

Isostatic pressing development. Quarterly report, October--December, 1971

Description: About 150 process-development pressings were made in prototype tooling. Problems arose which include stress cracking caused by difficult stripping of the part from the mandrel. Pressings made of PBX 9404 presented none of these problems. The primary effort is being directed toward developing a process for LX-09 and LX-04 pressings which at present are the problem areas.
Date: December 31, 1972
Creator: Adams, J.C. & Sheeran, R.E.
Partner: UNT Libraries Government Documents Department
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Pu, U redistribution in (U,Pu)O/sub 2/ fuels by temperature gradients

Description: A predictive model of the time-dependent evolution of radial Pu/U + Pu gradients in operating nonmolten mixed oxide fuels is being developed. This model is based on preferential evaporation-condensation and vapor transport of metal-bearing species either along cracks and porosity channels within the fuel or inside closed pores migrating up the temperature gradient; equilibrium thermodynamics are applied to calculate the continually changing vapor composition over the hot fuel. Predictions of the model are used in combination with recent in-pile experimental data (from nonmolten mixed oxide fuel pins irradiated in EBR-II from 0.2 to about 11 at. % burnup at varying powers) to delineate the key parameters in radial actinide redistribution. A correlation between fuel stoichiometry (O-to-Pu ratio) and the degree of redistribution (described by an enrichment factor ..gamma../sub Pu/) identified, however, the degree of restructuring of the fuel - as determined by the peak linear power rating, time at this power, and the initial fuel density - also has a strong influence on the final value of ..gamma../sub Pu/. Certain kinetic features of the process and intended modifications to the present model are discussed, and evidence for axial actinide vapor transport in an irradiated annular fuel is also presented.
Date: August 1, 1972
Creator: Adamson, M. G. & Aitken, E. A.
Partner: UNT Libraries Government Documents Department
open access

Transmissivity Iterative Program user's manual

Description: This user' s manual contains listings and functional definitions of the various directives available in the Iterative Sequence. These directives are used to operate the Iterative Sequence and to direct and complete the actual analysis. A complete and thorough description of each directive is contained in the report, The Transmissivity Iterative Programs on the PDP-9: A Man-Machine Interactive System,'' BNWL-1707. (auth)
Date: January 1, 1972
Creator: Addison, L.E.; Friedrichs, D.R. & Kipp, K.L.
Partner: UNT Libraries Government Documents Department
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