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Serial/Series Title
MUSC Environmental Biosciences Progress Report
14
LLE Review Quarterly Report
9
Field Study of Disposed Solid Wastes From Advanced Coal Processes Progress Report
8
High Resolution Prediction of Gas Injection Process Performance for Heterogeneous Reservoirs Quarterly Report
7
NOx Control Options and Integration for US Coal Fired Boilers Quarterly Report
7
ORNL Radioisotope Distirbution Program Progress Report
7
Development of On-line Instrumentation and Techniques to Detect and Measure Particulates Quarterly Report
4
High temperature electrochemical separation of H{sub 2}S from coal gasification process streams. Quarterly progress report
4
ANL Metallurgy Division Progress Report
3
Alternative Fuels and Chemicals From Synthesis Gas Progress Report
3
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16,351 Matching Results
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Production electrolysis studies V
This study seeks to determine the decomposition of bismuth trioxide by polarography. Results gained confirmed that at decomposition potentials observed that bismuth will not be reduced under normal plating conditions observed during production.
Date:
December 31, 1948
Creator:
Power, W. H. & Ford, M.
Object Type:
Report
System:
The UNT Digital Library
Production research progress report, February 16--29, 1948
The equipment for the Bismuth-II process has been installed at Unit IV., and two runs have been made. The results on the potential of bismuth in bismuth chloride solutions have been summarized and calculations made on the concentration of silver in solution which must be present if silver is to be reduced to the metal by Metallic bismuth. The results have been compared with earlier experiments in which the deposition of silver on bismuth was investigated by the use of gamma active silver as a tracer. From the results it becomes quite evident that the scrubbing of silver on bismuth, under the present conditions employed in the production process, cannot be attributed to the reduction of silver to the metal, but must result from the adsorption of silver ions on the surface of the bismuth powder. From these same calculations it is also evident that when silver is employed as a scrubbing medium, bismuth will be deposited on the silver surface until the silver concentration in the bismuth chloride solution reaches a concentration of 20--200 ppM of silver in the bismuth, depending on the chloride concentration of the solution.
Date:
December 31, 1948
Creator:
Payne, J.H. Jr.
Object Type:
Report
System:
The UNT Digital Library
Quartz fiber research progress report, March 1--31, 1948
A brief description of the construction of three quartz fiber microbalances is provided.
Date:
December 31, 1948
Creator:
Olt, R.G.
Object Type:
Report
System:
The UNT Digital Library
Quartz fiber research progress report. May 1--31, 1948
This document describes the construction and calibration of a quartz fiber microbalance. The preparation and purification of diphenyl carbazide for use as a cement with the quartz fibers is also described.
Date:
December 31, 1948
Creator:
Olt, R.G.
Object Type:
Report
System:
The UNT Digital Library
Electronics progress report, January 1--31, 1949
Considerable study has been given to the problem of a cathode-follower coupling circuit for matching a B-wall tube to a properly terminated coaxial cable. A matched circuit makes it possible to obtain faster counting rates independent of practical cable lengths. A breadboard circuit has been built and first results indicate that a two millivolt signal at the input of the cathode-follower will operate the Model 162 Instrument Development Laboratory Scaling Unit when adjusted for maximum gain. This is comparable to the voltage available when the B-wall tube is coupled to its amplifier through a coaxial cable. Shielded room measurements have been completed in the ``R`` Building. One log-amplifier (EL-257) was delivered to group 32, one scaler-multiplier (EL-252) to group 34, one four-input GM mixer (EL-247 to Group 24, and the plating control regulation checker (EL-258) plus the portable pulse generator (EL-261) to Group 12. The scaler-multiplier (EL-253)is 20 per cent complete and the motor-driven slide wire and the four-input gamma mixer (EL-262) are 95 per cent complete. The manufacturing specifications for plating controls and the instruction book for the portable pulse generator (EL-2561) have been submitted for duplication and should be completed by January 31, 1949. The two (2) 6 …
Date:
January 31, 1949
Creator:
Heyd, J.W.
Object Type:
Report
System:
The UNT Digital Library
Regional survey monthlies, January 1949
This report provides the regional radiation surveys for January through December 1949.
Date:
January 31, 1949
Creator:
Paas, H. J.
Object Type:
Report
System:
The UNT Digital Library
Pile operation at higher power
This memorandum presents a summary of current technical considerations on the feasibility of operating the piles at higher powers. These were reviewed and are recorded here as a basis for further action to be taken by the Manufacturing Divisions.
Date:
March 31, 1949
Creator:
Wende, C. W. J.
Object Type:
Report
System:
The UNT Digital Library
Report on the biological research program for the period January 1, 1949--March 31, 1949
This document details the activities of the biological research program conducted by the Mound Laboratory during the first quarter of 1949.
Date:
March 31, 1949
Creator:
Svirbely, J. L.
Object Type:
Report
System:
The UNT Digital Library
Investigation of the Stack Gas Filtering Requirements and Development of Suitable Filters. Report No. 5
Investigation of dust loading capacity for various assemblies of air filter media on atmospheric dust has continued using the small tester described in previous reports. The effect of fiber size and packing density in Fiberglas mat has been studied. The combination of very fine fibered glass mats now in use at Oak Ridge was given special investigation. Tests were made using a coarser mat as a prefilter and an economic advantage was showm for such protection. As a result of laboratory studies on gauze backed hand sheets a paper mill run is planned to make paper comparable to #6 now used by Chemical Corps for AEC filters but stronger and lower in cost In this run the paper will be made with a reenforcing gauze backing. Fabrication work is being carried on with emphasis on two special shapes of units both of which aim to simplify installation and removal and to give better protection to operating personnel when filters are being changed. These shapes namely the hollow cube and the circular will be described in detail with sketches and test data. A 950 CFM full scale model of the hollow cube has been constructed to demonstrate the practicability of the …
Date:
May 31, 1949
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The alloy systems uranium-aluminum and uranium-iron
None
Date:
October 31, 1949
Creator:
Gordon, P. & Kaufmann, A.R.
Object Type:
Report
System:
The UNT Digital Library
Basic chemistry of gallium: a study of the chlorogallates August 1, 1947, - June 30, 1949. Final Report
None
Date:
October 31, 1949
Creator:
Taube, H. & Friedman, H.L.
Object Type:
Report
System:
The UNT Digital Library
Basic chemistry of gallium: the stability of gallium halide complex ions in aqueous solutions. August 1, 1947 - June 30, 1949
None
Date:
October 31, 1949
Creator:
Taube, H. & Wilson, A.S.
Object Type:
Report
System:
The UNT Digital Library
Production of mesons by x-rays
None
Date:
October 31, 1949
Creator:
McMillan, E. M. & Peterson, J. M.
Object Type:
Report
System:
The UNT Digital Library
Radioactive decontamination properties of laboratory surfaces. I. Glass, stainless steel, and lead
None
Date:
October 31, 1949
Creator:
Tompkins, Paul C. & Bizzell, Oscar M.
Object Type:
Report
System:
The UNT Digital Library
Electronics progress report, April 1--30, 1949
Prospectus` of Band Pass Amplifiers for Proportional Counters and Instrumentation for the Study of the Electrodeposition Potential of Radioactive Elements have been submitted for review and approval. An error was found in calculations for the band pass amplifier discussed in Group 9 of the Electronics Progress Report,MLM-306, March 1--31, 1949, on the Cathode-Follower Probe. New calculations have been made and a band pass filter constructed to match the new values. Work on the cathode-follower circuit for coupling a Boron-wall tube to its linear amplifier indicated that the limit to the sharpness of a pulse which could be achieved was possibly caused by poor amplitude versus frequency response of the linear amplifier. To check this theory, modifications were made on an existing scaler which resulted in a frequency response flat up to 4.5 megacycles. Plans are being made to improve the amplitude versus frequency of the higher frequencies. The response curve shows a slightly rising characteristic at 4.5 megacycles and an attenuation at 7 megacycles. Construction of the rf generator has been resumed in an effort to deliver the finished product to Group 4 by approximately May 6, 1949. The meter circuit will measure relative rf output voltage instead of absolute …
Date:
December 31, 1949
Creator:
Heyd, J. W. & Ohmart, P. E.
Object Type:
Report
System:
The UNT Digital Library
Electronics progress report, March 1--31, 1949
With the completion of tests of the prototype cathode-follower, it was decided to produce three more models. These have been constructed and pass the same pulse as that of the prototype. Drawings are being made of these units. By the time these units had been completed, the amplifier of the scaler was modified so that its frequency response was essentially flat up to 4.5 megacycles. Using this amplifier and the cathode-follower, a study of the pulse shapes was made and four different pulse shapes were found to be obtainable. A band pass network between the B-wall tube and the input of the cathode-follower provided a very substantial improvement over the shunt peaking network with a band pass of 1.8 to 6.5 megacycles and provided clean, uniform pulses. Plans are being made to experiment with a filter of narrower band pass, which, if satisfactory, will produce greater amplitude. When the final band pass has been determined, a combination of shunt peaking and band pass networks should provide a net gain of 30% in amplitude. The result of this research is to provide an immediate improvement in resolution loss and a possibility of realizing a still lower minimum resolving time when the …
Date:
December 31, 1949
Creator:
Heyd, J. W. & Ohmart, P. E.
Object Type:
Report
System:
The UNT Digital Library
Instrumental analysis progress report, June 1--30, 1949
Several bismuth compounds have been submitted by E. Orban for examination by x-ray diffraction. The sample of polonium in contact with platinum mentioned in the May progress report was received and identified tentatively from its x-ray diffraction pattern as PtPo{sub 2}. Calibration of the Perkin-Elmer infrared spectrophotometer has been completed and a preliminary study of the infrared absorption of NiCO{sub 4} made. Data showing the spectral purity obtainable on three ultraviolet-visible spectrophotometers have been completed. The emission spectrum of a sample of volatile impurity from the operations process has been obtained.
Date:
December 31, 1949
Creator:
Timma, D.L.
Object Type:
Report
System:
The UNT Digital Library
Production research progress report, March 1--31, 1949
A study has been made of the time and temperature required to anneal Teflon and Fluorothene. It has been found that, by proper annealing, the strains my be removed and cold-flow prevented. The disk stopcocks prepared with annealed plastics have not developed leaks on standing. A description is given of the modified slug-dissolver heating unit which has been installed in the Bismuth-II Process Line. Work has been continued on the absorption spectra of bismuth in hydrochloric acid solutions. Two methods have been described for the interpretation of absorption spectra data. The transmission curve of the Evelyn colorimeter filters have been measured on the Cary recording spectrophotometer. The resulting curves should aid in the selection of the proper filter for a given calorimetric analyses. A brief outline for the proposed method of decontaminating platinum has been presented.
Date:
December 31, 1949
Creator:
Payne, J.H. Jr.
Object Type:
Report
System:
The UNT Digital Library
Recovery of uranium and plutonium from Redox off-standard aqueous waste streams
In the operation of countercurrent extraction columns as in the Redox process, it is possible, and probable, that from unexpected behaviour of a column, operator error, colloid formation, etc., there will result from time to time excessive losses of uranium and plutonium in the overall process. These losses will naturally accumulate in the waste streams, particularly in the aqueous waste streams. If the loss is excessively high, and such lost material can be recovered by some additional method, then if economical and within reason, the recovered materials ran be returned to a ISF column for further processing. The objective of this work has been to develop such a method to recover uranium and plutonium from such off-standard waste streams in a form whereby the uranium send plutonium can be returned to the process line and subsequently purified and separated.
Date:
December 31, 1949
Creator:
Holm, C. H. & Matheson, A. R.
Object Type:
Report
System:
The UNT Digital Library
THEORETICAL ESTIMATE OF MAXIMUM POSSIBLE NUCLEAR EXPLOSION
The maximum nuclear accident which could occur in a Na-cooled, Be moderated, Pu and power producing reactor is estimated theoretically. (T.R.H.) 2O82 Results of nuclear calculations for a variety of compositions of fast, heterogeneous, sodium-cooled, U-235-fueled, plutonium- and power-producing reactors are reported. Core compositions typical of plate-, pin-, or wire-type fuel elements and with uranium as metal, alloy, and oxide were considered. These compositions included atom ratios in the following range: U-23B to U-235 from 2 to 8; sodium to U-235 from 1.5 to 12; iron to U-235 from 5 to 18; and vanadium to U-235 from 11 to 33. Calculations were performed to determine the effect of lead and iron reflectors between the core and blanket. Both natural and depleted uranium were evaluated as the blanket fertile material. Reactors were compared on a basis of conversion ratio, specific power, and the product of both. The calculated results are in general agreement with the experimental results from fast reactor assemblies. An analysis of the effect of new cross-section values as they became available is included. (auth)
Date:
January 31, 1950
Creator:
Bethe, H.A.
Object Type:
Report
System:
The UNT Digital Library
THE PATH OF OXYGEN IN PHOTOSYNTHESIS
An experiment is described in which an attempt is made to follow the path of oxygen in photosynthesis by the use of O{sup 18} as a tracer.
Date:
March 31, 1950
Creator:
Dorough, G.D. & Calvin, M.
Object Type:
Report
System:
The UNT Digital Library
Fission Product Analysis of Urine
A method has been adapted from ion exchange studies for removal of the fission products, Cs-137, Sr-90, and the rare earths for both untreated urine samples and the supernates from the precipitation steps in the TTA procedure for plutonium. Because of the excessive amount of eluant necessary to separate the fission products and the resulting time required to run a separation, a method was developed to remove the Sr-Y, Ce and Pr by chemical means and Cs from the raffinate of this extraction by ion exchange. It should be noted that Cs is easily separated from Pu in the separations plant, and that is presence as a contaminate in the outer areas is not as probable as the other long-lived fission products. This fact has been born out in three years of analyzing contaminated samples from the 200 Area by the H.I. Development Divisions.
Date:
May 31, 1950
Creator:
Thorburn, R. C.
Object Type:
Report
System:
The UNT Digital Library
THREE NEW DELAYED ALPHA EMITTERS OF LOW MASS
Two new positron active isotopes, B{sup 8} and Na{sup 20}, have been found to decay to excited states of Be{sup 8} and Ne{sup 20}, which in turn decay 'instantaneously' by alpha emission. Their half-lives are 0.65 {+-} 0.1 sec. and 1/4 sec. respectively. N{sup 12} is also found to have a low energy positron group which leads to an {alpha}-unstable excited state in C{sup 12}. The masses of B{sup 8} and Na{sup 20} are 8.027 and 20.015 respectively. B{sup 8} decays by a 13.7 {+-} 0.3 Mev positron, through the same excited state of Be{sup 8} as does Li{sup 8}. Estimates of the energies of the excited state in C{sup 12} and Ne{sup 20} are made.
Date:
May 31, 1950
Creator:
Alvarez, Luis W.
Object Type:
Report
System:
The UNT Digital Library
GENERAL RESEARCH REPORT FOR APRIL 1-JUNE 26, 1950. (Radium Volume)
None
Date:
July 31, 1950
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library