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The Lindemann and Grüneisen Laws

Description: The Lindemann assumption of direct contact of neighboring atoms at fusion is replaced by the criterion that melting occurs when the root-mean-square amplitude of thermal vibration reaches a critical fraction ρ, presumed the same for all isotropic monatomic solids, of the distance of separation of nearest-neighbor atoms. The Debye-Waller theory of the temperature dependence of the intensity of Bragg reflection of x-rays is used, without further assumptions, to derive a generalized Lindemann law… more
Date: March 23, 1955
Creator: Gilvarry, J. J. (John James), |1917-
Partner: UNT Libraries Government Documents Department
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Volatilization of Cesium During Calcination and Hydrolysis of Cs2ZnFe(CN)6 Precipitates

Description: The feasibility of removing and recovering cesium-137 from various HAPO process solutions by precipitation of Cs2ZnFe(CN)6 has been demonstrated previously. Pilot plant studies of calcination and steam hydrolysis of non-radioactive Cs2ZnFe(CN)6 precipitates by members of the Process Equipment Development Operation are currently in progress. In support of these pilot plant studies, experiments were performed to determine the extent, if any, to which cesium volatilizes during calcination and hydr… more
Date: March 23, 1960
Creator: Bouse, Donald G. & Schulz, Wallace W.
Partner: UNT Libraries Government Documents Department
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A Mathematical and Statistical Approach to the Design and Analysis of a Reactor Containment Vessel Pressure Test

Description: This report discusses the mathematical and statistical questions concerned with the estimation of a leak rate from data collected during a reactor containment vessel pressure test such as that performed on the PRTR vessel in May, 1959. A mathematical method is suggested in Section 3 for the construction of a total number of gas molecules in the containment vessel time series using vessel absolute pressure and temperature readings at several positions within the vessel. A formula for the precisi… more
Date: March 23, 1960
Creator: Nicholson, W. L.
Partner: UNT Libraries Government Documents Department
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Polishing and Etching of Uranium Dioxide

Description: Various methods and procedures for preparing uranium dioxide bodies for metallographic examination and study have been utilized by various investigators. Unfortunately, these methods are not in general satisfactory for use on irradiated uranium dioxide. Since radiation damage studies on irradiated uranium dioxide require use of electron microscopy, and reveal structure by virtue of surface relief. This report covers an investigation of etching methods compatible with radiometallurgy and electro… more
Date: March 23, 1959
Creator: Thomas, K. H.
Partner: UNT Libraries Government Documents Department
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Gamma Photometer Use for Nondestructive Determination of Uranium Content of Enriched "C" Slugs

Description: it is desired to know the accuracy and precision of uranium content determination with the γ-photometer. Several possible sources of error (involving both bias and variability) arise when the problem is fully considered. As analysis of data collected for the evaluation of this technique has progressed, there has been a continued discovery of new sources of error and bias further complicating this evaluation. These possible sources have not yet all been systematically examined and thus a complet… more
Date: March 23, 1955
Creator: Shortess, Jr., C. J.
Partner: UNT Libraries Government Documents Department
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A Method of Recovering Thorium from Slag Materials

Description: Abstract. a method of recovering thorium from slag from the bomb process of producing thorium has been developed. HCl and NaOH are the only chemicals required in quantity. Materials required for a representative slag are given.
Date: March 23, 1945
Creator: Johnson, Oliver & Fisher, R. W.
Partner: UNT Libraries Government Documents Department
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[TXSSAR Officer Reports: March 23 - 24, 2012]

Description: Officer Reports for the Texas Society, Sons of the American Revolution, compiled March 23 - 24, 2012.
Date: 2012-03-23/2012-03-24
Creator: Texas Society Sons of the American Revolution
Partner: UNT Libraries Special Collections
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[TXSSAR Committee Reports: March 23 - 25, 2012]

Description: Committee Reports for the Texas Society, Sons of the American Revolution, compiled for the March 23 - 25, 2012 State Convention.
Date: 2012-03-23/2012-03-25
Creator: Texas Society Sons of the American Revolution
Location: 29.521535 -98.502451
Partner: UNT Libraries Special Collections
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Summary of the Research Progress Meeting of March 9, 1950

Description: The design of the present time of light mass spectrograph is similar to that of the isotron devised some time ago for isotope separation. The spectrograph will employ the time of flight principle only for the isotopic analysis of small samples.
Date: March 23, 1950
Creator: Kramer, Henry P.
Partner: UNT Libraries Government Documents Department
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Low Background Nuclear Counting Equipment

Description: Abstract: Both direct and coincidence counting apparatus are described. The elimination of cosmic ray events by coincidence plus gamma ray shielding permits the reduction of counting rates far beyond that obtainable with shielding alone. By selection of materials and development of new components and techniques, the residual background count of beta counting equipment can be reduced to a very low value. Geiger counter equipment for routine laboratory measurements is described, have a backgr… more
Date: March 23, 1959
Creator: LeVine, H. D.; Charlton, L. & Graveson, R. T. (Robert T.)
Partner: UNT Libraries Government Documents Department
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SM-1 Reactor Vessel Closure Stud Investigation

Description: Abstract: This report presents metallurgical .analyses and corrosion tests conducted to determine :causes of failure of two SM- 1 reactor vessel studs due to fracture in the threaded areas, after 23 months' operation (March 1959). Conclusions of corrosion tests are: (1) failure of the studs was caused by stress corrosion cracking, (2) contributing factors to failure of the studs were improper control of heat treatment of the studs and absence of treatment for stress relief after thread grindin… more
Date: March 23, 1962
Creator: Reali, D. L.
Partner: UNT Libraries Government Documents Department
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Deposit Summary

Description: Deposit summary of $24.01 made on March 23, 2009.
Date: March 23, 2009
Partner: UNT Libraries Special Collections
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[ActBlue Invoice]

Description: An invoice from Texas Stonewall Democratic Caucus to ActBlue of $25.00 on March 23, 2009.
Date: March 23, 2009
Partner: UNT Libraries Special Collections
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Laboratory Studies of the Effects of Pressure and Dissolved Gas Supersaturation on Turbine-Passed Fish

Description: The objective of this study was to examine the relative importance of pressure changes as a source of turbine-passage injury and mortality. Specific tests were designed to quantify the response of fish to rapid pressure changes typical of turbine passage, with and without the complication of the fish being acclimated to gas supersaturated water. We investigated the responses of rainbow trout (Oncorhynchus mykiss), chinook salmon (O. tshawytscha), and bluegill sunfish (Lepomis macrochirus) to th… more
Date: March 23, 2001
Creator: Abernethy, Cary S.; Amidan, Brett G. & Cada, G F.
Partner: UNT Libraries Government Documents Department
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Comparing 10 Methods for Solution Verification, and Linking to Model Validation

Description: Grid convergence is often assumed as a given during computational analyses involving discretization of an assumed continuum process. In practical use of finite difference and finite element analyses, perfect grid convergence is rarely achieved or assured, and this fact must be addressed to make statements about model validation or the use of models in risk analysis. We have previously provided a 4-step quantitative implementation for a quantitative V&V process. One of the steps in the 4-ste… more
Date: March 23, 2005
Creator: Logan, R W & Nitta, C K
Partner: UNT Libraries Government Documents Department
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Characterizing Network Services through Cluster-Set Variations

Description: Common Internet services can be reliably distinguished based solely upon the locations of clusters in traffic-based features (ratios of inbound to outbound packets, ratios of packets to payloads, etc.) This capability has value in revealing the nature of ''hidden'' (tunneled) services and in detecting anomalous changes to known services. We provide measures of session capture volumes sufficient to make confidence-level assertions regarding ''unknown'' services, and outline a throughput system f… more
Date: March 23, 2005
Creator: Bartoletti, A & Tang, N
Partner: UNT Libraries Government Documents Department
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Scalable Parallel Algebraic Multigrid Solvers

Description: The authors propose a parallel algebraic multilevel algorithm (AMG), which has the novel feature that the subproblem residing in each processor is defined over the entire partition domain, although the vast majority of unknowns for each subproblem are associated with the partition owned by the corresponding processor. This feature ensures that a global coarse description of the problem is contained within each of the subproblems. The advantages of this approach are that interprocessor communica… more
Date: March 23, 2005
Creator: Bank, R; Lu, S; Tong, C & Vassilevski, P
Partner: UNT Libraries Government Documents Department
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Flibe Coolant Cleanup and Processing in the HYLIFE-II Inertial Fusion Energy Power Plant

Description: In the HYLIFE-II chamber design, a thick flowing blanket of molten-salt (Li{sub 2}BeF{sub 4}) called flibe is used to protect structures from radiation damage. Since it is directly exposed to the fusion target, the flibe will absorb the target debris. Removing the materials left over from target explosions at the rate of {approx}6/s and then recycling some of these materials poses a challenge for the inertial fusion energy power plant. The choice of target materials derives from multi-disciplin… more
Date: March 23, 2001
Creator: Moir, R W
Partner: UNT Libraries Government Documents Department
open access

Containment Prospectus for the PIANO Experiment

Description: PIANO is a dynamic, subcritical, zero-yield experiment intended for execution in the U1a.102C drift of the U1a complex at the Nevada Test Site (NTS) (Figure 1). The data from the PIANO experiment will be used in the Stockpile Stewardship Program to assess the aging of nuclear weapon components and to better model the long-term performance of the weapons in the enduring stockpile. The PIANO experiment is composed of one experimental package. The experimental package will have high explosive (HE)… more
Date: March 23, 2001
Creator: Burkhard, N R
Partner: UNT Libraries Government Documents Department
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Review of Geophysical Characterization Methods Used at the Hanford Site

Description: Geophysical methods have been used for characterization of hydrogeologic conditions and/or contaminant distributions at the Hanford site since at least the mid- to late-1940s. A review of these geophysical methods is presented in two parts: 1) shallow surface-based geophysical methods and 2) borehole geophysical-logging methods.
Date: March 23, 2000
Creator: Last, George V. & Horton, Duane G.
Partner: UNT Libraries Government Documents Department
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Engineering study Purex two-cycle conversion

Description: Adoption of a two-cycle solvent extraction process at Purex, in place of the present three-cycle process, offers great potentialities for reduction of manufacturing costs, improved product and by product recovery and increased capacity. This report deals with the engineering feasibility of converting Purex for two-cycle operation.
Date: March 23, 1957
Creator: Carpenter, G. K.; LaRiviere, J. R. & Michels, L. R.
Partner: UNT Libraries Government Documents Department
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P-10 chemical equilibria

Description: Though the product of P-10 is T{sub 2}, the chief hazard is the tritium oxides, and tritium in water vapor might exchange with the hdyrogen in the water. If a catalyst is present, essentially all of the tritium would be exchanged. Because we do not know what catalyzers may exist at P-10 or in the lungs of a person breathing tritium, a ready answer cannot be given to the question of the importance of the exchange reactions. The HT + H{sub 2}O {r_reversible} HTO + H{sub 2} is also considered. The… more
Date: March 23, 1950
Creator: Roesch, W. C.
Partner: UNT Libraries Government Documents Department
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