Resource Type

States

A Proposed Mechanism and Method of Correlation for Convective Boiling Heat Transfer with Liquid Metals (open access)

A Proposed Mechanism and Method of Correlation for Convective Boiling Heat Transfer with Liquid Metals

An additive, interacting mechanism of micro and macro-convective heat transfer is proposed to represent boiling heat transfer with net vapor generation to saturated liquid metals in convective flow. Based on this mechanism, a method for calculating boiling coefficients is developed. The correlating is shown to be in fair agreement with early experimental results for convective boiling of potassium and sodium.
Date: October 14, 1963
Creator: Chen, John C.
Object Type: Report
System: The UNT Digital Library
An Investigation of the Low Frequency Motions in Isotactic and Atactic Polypropylene by Neutron Inelastic Scattering (open access)

An Investigation of the Low Frequency Motions in Isotactic and Atactic Polypropylene by Neutron Inelastic Scattering

The vibrational spectra between 1000 and 30 cm-1, derived from measurements of the inelastic scattering of "cold" neutrons, are presented for isotactic polypropylene at samples temperatures below and above both the glass transition and the melting point. A tentative assignment of the observed modes is suggested by comparison with recent calculations by Miyazawa, Ideguchi, and Fukushima of the optically active phases of the fundamental vibrations for an isotactic helical polypropylene chain and with the neutron measurements of the low frequency modes in highly-crystalline polyethylene. In addition to the skeletal optical modes, the neutron spectra for isotactic polypropylene indicate the existence of two acoustic modes - skeletal deformation and skeletal torsion - with high frequency limits at 620 ± 50 cm-1 and 110 ± 10 cm-1, respectively. As in polyethylene, these modes appear to be strongly influenced by the presence and phase of the disorder in the sample. Similar spectra for atactic polypropylene above and below the glass transition show a much less pronounced structure, although weak bands are observed which correlate well with the skeletal optical modes observed in the isotactic polymer.
Date: October 14, 1963
Creator: Safford, G. J.; Danner, H. R. & Boutin, H.
Object Type: Report
System: The UNT Digital Library
The Simultaneous Labeling of Cells in Different Segments of the Mitotic Cycle with Tritiated Thymidine and Colchicine and the Effect of Colchicine on Thymidine Uptake (open access)

The Simultaneous Labeling of Cells in Different Segments of the Mitotic Cycle with Tritiated Thymidine and Colchicine and the Effect of Colchicine on Thymidine Uptake

Treatment of Pisum root meristems with nutrient solutions containing tritiated thymidine (H3-T) and colchicine simultaneously labeled cells in two different segments of the mitotic cycle. Tracings of the serial progression of these differently labeled cells through mitosis resembled sine-cosine curves. When the labeled cells are in interphase the sign of the curves is negative, when they are in mitosis the sign is positive. The concept of the mitotic cycle in terms of trigonometric functions was presented as one way of transferring cycle from a celestial time scale to that of a biological clock.
Date: October 14, 1963
Creator: Van't Hof, J. & Ying, Huei-Kuen
Object Type: Report
System: The UNT Digital Library
Effects of Chronic Excess Salt Ingestion: Possible Implications of the Accelerated Induction of Experimental Hypertension by 2,4-Dinitrophenol (open access)

Effects of Chronic Excess Salt Ingestion: Possible Implications of the Accelerated Induction of Experimental Hypertension by 2,4-Dinitrophenol

Recently, we reported that the administration of the thyroid hormone, L-triiodothyronine (T3), markedly accelerated the development of experimental hypertension associated with a high-salt intake in intact rate. Earlier, Selye and his associates and Masson, Corcoran, and Page has observed a similar effect from thyroxin in uninephrectomized salt-fed rats. We were aware of the fact that oxidative phosphorylation is uncoupled by the thyroid hormone and were intrigued by the possibility that such uncoupling was instrumental in the accelerated development of the hypertension observed. The work reported here was undertaken with this possibility in mind; it was based on the well documented observation of Loomis and Lipmann that dinitrophenol reversibly inhabits oxidative phosphorylation. The present studies indicates that 2, 4-dinitrophenol, like L-triiodothyronine, can also rapidly induce hypertension in salt-fed rate. These observations have led us to develop a working hypothesis that may have general implications relative to the pathogenesis of hypertension in man.
Date: October 14, 1963
Creator: Dahl, Lewis K.; Heine, Martha & Tassinari, Lorraine
Object Type: Report
System: The UNT Digital Library
The Effect of Mitotic Cycle Duration on Chromosome Breakage in Meristematic Cells of Pisum Sativum (open access)

The Effect of Mitotic Cycle Duration on Chromosome Breakage in Meristematic Cells of Pisum Sativum

One of the more apparent differences between acute and chronic irradiation is that exposure in the former is generally confined to a small fraction of a single mitotic cycle while in the latter; exposure of mitotically active tissue usually involves at least several cycles. Because of this difference, the number of cells in each stage of interphase would be of primary importance in acute radiation experiments since radiosensitivity is not the same in the G1, S and G2 periods. The duration of the total mitotic cycle should be more important in chronic experiments because most of the cells in the tissue will have passed through each of the interphase stages (G1, S and G2) during the period of irradiation thus negating any different effect.
Date: October 14, 1963
Creator: Van't Hof, J. & Sparrow, A. H.
Object Type: Report
System: The UNT Digital Library
Gene Structure: Genetic Fine Structure. Remarks. (open access)

Gene Structure: Genetic Fine Structure. Remarks.

Though only recently established, this concept has been developing for a long time. More than thirty years ago Dubinin, Serebrovsky, and other, investigating the phenotypes of a number of "achaete-scute" alleles of Drosophilia melanogaster, found that the alleles could be arranged in a definite series accoding to bristle patters, and also that the heterozygotes lacked only those bristles which were affected in common by both participating alleles. They concluded that the serial classification of alleles according to bristle patters had its counterpart in a similar arrangement of portions of the achaete-scute gene locus. On this assumption they divided the locus into twelve elementary subunits. It was assumed that each allele arose by a change involving a certain combination of these centres. According to their theory, the achaete-scute locus is made up of separate, regularly spaced, and linearly arranged functional units. Several years later, Oliver described the occurrence of crossing over between two alleles of the "lozenge" locus. Then Green and a number of other workers analyzed similar phenomena in different regions of Drosophila chromosome. During the same period Lewis developed the theory of pseudoallelism, which interprets the occurrence of recombinants in interallelic crosses as the result of gene duplications. Thus …
Date: October 14, 1963
Creator: Demerec, M.
Object Type: Report
System: The UNT Digital Library
The Uranium-Rhenium Alloy System (open access)

The Uranium-Rhenium Alloy System

Abstract The phase diagram of the uranium-rhenium alloy system is presented along with a discussion on transformation kinetics of the uranium solid solutions. The phase diagram is of the double eutectic type with the intermediate phase having the composition URe2. This phase exhibits allotropy at 180°C and melts congruently at 2200°C. URe2 reacts sluggishly with the uranium solid solutions below 750°C to form the peritectoid compound U2Re. Eutectic reactions occur at 1105° and 2105°C at respective compositions of 10.5 and 65.5 wt. % Re. Eutectoid reactions occur at 643° and 681°C at compositions of 1.4 and 6 wt. % Re, respectively. The maximum solubility of rhenium in α uranium is about 0.4 wt. % at 643°C and in β uranium is 1.9 wt. % at 681°C. The solubility of rhenium in γ uranium is 6 wt. % at 681°C and increases to about 7 wt. % at 975°C. The solubility of uranium in rhenium is 0.6 wt. % at room temperature with little variation up to 2000°C. Alloys of β and γ uranium containing more than about 1.2 and 7 wt. % Re respectively, can be readily supercooled to room temperature. Rapid cooling of γ alloys containing less than about …
Date: January 14, 1963
Creator: Jackson, R. J. (Robert James), 1929-; Williams, D. E. & Larsen, W. L.
Object Type: Report
System: The UNT Digital Library
Pressure-Volume-Temperature Measurements on Solids (open access)

Pressure-Volume-Temperature Measurements on Solids

From abstract: "The results of recent measurements on the equations of state of sodium and xenon are discussed. The experimental data for each of these are analyzed to show that the isothermal compressibility is solely a function of volume within experimental accuracy. The basic differences between the low temperature PV relationships for sodium and xenon are shown to be easily understandable in terms of the elementary theories of these substances. The range of experimental pressures (to 20 kbars) and temperatures (20°K to the triple point) is sufficiently great so as to produce significant changes in the lattice thermal properties in each case. These changes are indicated through the use of zero pressure heat capacity data in combination with the equation of state data to calculate the volume and temperature dependence of the Debye Θ. The result is quite spectacular for xenon, where a pressure of 20 kbars roughly doubles ΘD."
Date: May 14, 1963
Creator: Swenson, C. A.
Object Type: Report
System: The UNT Digital Library
NPR tritium production (open access)

NPR tritium production

None
Date: February 14, 1963
Creator: Baranowski, F. P.
Object Type: Report
System: The UNT Digital Library
Hunt N Peck: A program to perform zone loading calculations on the IBM-7090 (open access)

Hunt N Peck: A program to perform zone loading calculations on the IBM-7090

Presently, there is no standard technique in use by all assigned physicists to actually calculate required reactor loading changes. Basically, loading changes are made by determining the number of enrichment columns needed for equilibrium operation following startup; this is usually based upon past experience with relatively similar reactor conditions. Selection of locations for placement or removal of the enrichment then involves the application of information gleaned from temperature maps, previous experience, educated guesses, or a combination of the three. The program is based on one-group, one-dimensional, diffusion theory. Local buckling effects caused by fission products, temperatures, and materials are calculated for many small zones of the reactor before and after a discharge. Loading changes are then designed to produce a central zone buckling of zero with the required supporting buckling of the enrichment ring; equal bucklings for all zones within a particular region are achieved by manipulation of the enrichment inventory in each particular zone. This program is primarily designed for specific use by assigned physicists of the Pile Physics unit. Basic familiarity with the standard calculational techniques, nomenclature, and technical jargon of that group is necessary for effective application. Program input includes region geometry and material, plus reactivity variables; …
Date: August 14, 1963
Creator: Grumme, L. L.
Object Type: Report
System: The UNT Digital Library
Test Results for Unrestrained Reactor, Gunbarrel-Nozzle Assemblies (open access)

Test Results for Unrestrained Reactor, Gunbarrel-Nozzle Assemblies

These tests were performed in accordance with a letter fran R. C. Breisch to J. R. Spink, May 7, 1962. An unrestrained gunbarrel condition was simulated for each of the standard process tube inlet assemblies for B,C and K type reactors. Primary objects of the testing were to obtain data on movement, pigtail damage, and effect on flow to the process tube in case of a Van Stone flange failure without key restraint of the gunbarrel. All test conditions were relative to actual conditions, but these conditions were not necessarily typical or maximum. The gunbarrels were not loaded with do-nuts or thermal shield pieces. All of the assemblies moved instantly and rapidly when released under pressure. The B and K braided type pigtails crimped just upstream of the ferrule on the nozzle connection. The helical tube C-type pigtail stretched about six inches, but did not travel far enough to cause flow restriction. Tube flow for the B case was 54 per cent of that prior to Van Stone flange failure. For the K test, the flow was reduced to 69 per cent of that prior to Van Stone flange failure.
Date: February 14, 1963
Creator: Goff, J. M., Jr.
Object Type: Report
System: The UNT Digital Library
Nuclear safety criteria for special test loads -- N-Reactor (open access)

Nuclear safety criteria for special test loads -- N-Reactor

The initial fuel landing for the N-Reactor and the use of a specific alternative fuel element are described in a previous report. It is highly probable that it will also be desirable in the future to irradiate still other types of fuel elements in the reactor. If the test is of small scale, fever than five channels, or if these elements vary only slightly from the initial fuel load (or any other fuel type approved for large-scale use at some future date), the irradiation will be accomplished within the normal administrative procedures and controls established for the Production Testing Program. In this context, in-reactor testing of minor changes in the fuel cladding alloy, alternate methods of affixing end closures, different fuel support designs or similar changes are considered to be within the scope of normal productiontesting. It is possible, however, that it will be desirable to irradiate test fuel elements which are significantly different from any element approved for general use and in quantities of greater than five fuel columns at a given time. A more formalized review of such tests including approval by the AEC would appear appropriate in these instances. The purpose of this document is to outline …
Date: October 14, 1963
Creator: Nechodom, W. S. & Miller, N. R.
Object Type: Report
System: The UNT Digital Library
Hanford Laboratories monthly activities report, May 1963 (open access)

Hanford Laboratories monthly activities report, May 1963

The monthly report for the Hanford Laboratories Operation, May 1963. Reactor fuels, chemistry, dosimetry, separation processes, reactor technology, financial activities, biology operation, and physics and instrumentation research, and applied mathematics, and programming operation are discussed.
Date: June 14, 1963
Creator: unknown
Object Type: Report
System: The UNT Digital Library
CPD`s potential for processing the higher transuranics (open access)

CPD`s potential for processing the higher transuranics

Hanford`s potential has been evaluated for producing higher transuranic isotopes, particularly curium-242 and curium-244. This document outlines the concepts visualized, and estimates the potential impact on CPD`s development, construction, and production programs. The irradiation program would proceed in 3 steps: production of fuel-grade plutonium, its burning to higher isotopes and alloying with Al for use in one reactor, and the separated americium irradiated to form curium-242. Disposition of higher Pu isotopes and alternative production of curium-244 are discussed.
Date: March 14, 1963
Creator: Tomlinson, R. E.
Object Type: Report
System: The UNT Digital Library
Status report: Carbon-14 in the condensate from the silica gel dryers of the production reactors (open access)

Status report: Carbon-14 in the condensate from the silica gel dryers of the production reactors

Volatile compounds containing C{sup 14} produced in the cooling gas systems of Hanford reactors can be lost from the cooling gas by two routes. These are (a) escape via the reactor stacks through leaks in the cooling gas system and (b), adsorption with water vapor on the silica gel of the dryers for the cooling gas with subsequent regeneration of the silica gel and condensation of the water for disposal. Information relative to the release rates by the stack gas route was reported in HW-75618. The present report provides data relative to the C{sup 14} loss rates through the condensate obtained from regeneration of the silica gel dryers of the reactor gas cooling systems. The C{sup 14} containing compounds in the reactor gas are produced by n,{gamma} reaction on the nitrogen in the coolant gas, an n,{gamma} reaction on carbon in the CO{sub 2} component of the coolant gas, or an n,{gamma} reaction on the graphite moderator with subsequent volatilization. Studies are presently under way to determine the contribution of graphite ``burnout`` to the C{sup 14} containing volatile compounds in the coolant gas. Upon completion of these studies a topical formal report will be Issued which will include the findings …
Date: March 14, 1963
Creator: Barton, G. B.
Object Type: Report
System: The UNT Digital Library
Coincident Trip Pressure Monitors (open access)

Coincident Trip Pressure Monitors

At your request the Plant pressure monitor scram history for the period covering January 1, 1960, through June 31, 1963, was reviewed to predict the production saving that would result if a reliable pressure monitor dual-trip feature were added to the six old reactors.
Date: November 14, 1963
Creator: Newell, L. J. & Spencer, H. G.
Object Type: Report
System: The UNT Digital Library
Irradiation Processing Department monthly report, September 1963 (open access)

Irradiation Processing Department monthly report, September 1963

This document details activities of the Irradiation Processing Department during the month of August, 1958. A general summary is included at the start of the report, after which the report is divided into the following sections: Research and Engineering Operations; Production and Reactor Operations; Facilities Engineering Operation; Employee Relations Operation; and Financial Operation.
Date: October 14, 1963
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Irradiation Processing Department Monthly Report: February 1963 (open access)

Irradiation Processing Department Monthly Report: February 1963

This document details activities of the Irradiation Processing Department during the month of August, 1958. A general summary is included at the start of the report, after which the report is divided into the following sections: Research and Engineering Operations; Production and Reactor Operations; Facilities Engineering Operation; Employee Relations Operation; and Financial Operation.
Date: March 14, 1963
Creator: Hanford Atomic Products Operation. Irradiation Processing Department.
Object Type: Report
System: The UNT Digital Library
Irradiation Processing Department monthly report, May 1963 (open access)

Irradiation Processing Department monthly report, May 1963

This document details activities of the Irradiation Processing Department during the month of August, 1958. A general summary is included at the start of the report, after which the report is divided into the following sections: Research and Engineering Operations; Production and Reactor Operations; Facilities Engineering Operation; Employee Relations Operation; and Financial Operation.
Date: June 14, 1963
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Irradiation Processing Department Monthly Report: December 1962 (open access)

Irradiation Processing Department Monthly Report: December 1962

This document details activities of the Irradiation Processing Department during the month of December 1962.
Date: January 14, 1963
Creator: Hanford Atomic Products Operation. Irradiation Processing Department.
Object Type: Report
System: The UNT Digital Library
Irradiation Processing Department monthly report, July 1963 (open access)

Irradiation Processing Department monthly report, July 1963

This document details activities of the irradiation processing department during the month of July 1963. A general summary is included at the start of the report, after which the report is divided into the following sections: Research and Engineering Operations: Production and Reactor Operations; Facilities Engineering Operation; and Financial Operation.
Date: August 14, 1963
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Electron Beam Melting of Uranium (open access)

Electron Beam Melting of Uranium

Feed stock prepared from ingot, dingot, and under-saltmelted U was melted by electron bombardment. Analysis of the ingots produced revealed that some Al, Cr, Mg, Mn, and Pb were volatilized from the melt. C was reduced when Zr was present in the feed material. H/sub 2/ and N/sub 2/ also were removed, the latter oniy when there was a relatively high concentration in the feed material. The work indicated the need for very slow melting rates or the casting of large diameter ingots for successful refinement of U. (auth)
Date: June 14, 1963
Creator: Eikenberry, H. M.
Object Type: Report
System: The UNT Digital Library
Moisture Monitor Testing and Calibration (open access)

Moisture Monitor Testing and Calibration

ABS>Electrolytic moisture monitors which continuously analyze the moisture content of gases are commercially available. After a period of operation, these instruments may give erroneous readings, frequently because of damage to the electrolytic cell. A gas with a known and reproducible moisture content within the operating range would be useful for making operational response tests on these monltors and for checking their calibration. A paired- hydrate system of a chemical compound exhibits a water vapor pressure that is constant at a constant temperature. ff an unreactive gas is allowed to equilibrate with a paired-hydrate system, the moisture content of the gas is determined by the vapor pressure of the hydrate pair, the total pressure, and the temperature. Hydrated magnesium perchlorate was prepared which contained between four and six moles of water per mole of perchlorate. This material was pulverized lightly then packed into a stainless steel column and 100 cc/minute of air at atmospheric pressure was passed through the bed. The exit air from the column was analyzed with a moisture monitor. A gas residence time of two minutes in the column was found to be sufficient for establishing moisture equilibrium in the exit flow. The moisture content of the exit …
Date: March 14, 1963
Creator: Montgomery, C. D.; Googin, J. M. & Phillips, L. R.
Object Type: Report
System: The UNT Digital Library
MODE IDENTIFICATION IN THE IRIS-LOADED WAVEGUIDE OF A RF PARTICLE SEPARATOR (open access)

MODE IDENTIFICATION IN THE IRIS-LOADED WAVEGUIDE OF A RF PARTICLE SEPARATOR

A description is presented concerning model measurements which were necessary to determine the geometry of brazed or electroformed prototypes for deflecting waveguides. A systematic investigation was also made of other than deflecting modes to ensure nondegenerate field solutions at selected operating frequencies. (J.R.D.)
Date: January 14, 1963
Creator: Hahn, H. & Halama, H.J.
Object Type: Report
System: The UNT Digital Library