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Proceedings of the Workshop on Geothermal Reservoir Engineering
33
NOAA technical memorandum NMFS
3
National Oceanic and Atmospheric Administration Reports
3
Proceedings of RIKEN BNL Research Center Workshop
3
EBR-II Project
2
Flat-Plate Solar Array Project
2
Proceedings of the Eleventh Workshop on Geothermal Reservoir Engineering
2
Proceedings of the New Zealand Geothermal Workshop
2
Proceedings of the Twelfth Workshop on Geothermal Reservoir Engineering
2
Women's Bureau Issue Brief
2
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Removal of Radioisotopes From Solution by Earth Materials From Eastern Idaho
None
Date:
January 1, 0196
Creator:
Wilding, M. W. & Rhodes, D. W.
System:
The UNT Digital Library
Networking with China
This paper presents the history and current status Of computer networking between IHEP in Beijing, China and the rest of the world, starting with no links at the beginning of 1987 thru X.25 public networks and dial up links, to the installing, in March 1993, of one of the first dedicated 64 kbps satellite computer links between China and the outside world. In May 1994, IHEP became the first Chinese institution to have a fully operational world-wide Internet connection. Experience with this dedicated link between SLAC and IHEP will be presented together with future plans to add a land line between KEK and IHEP and to extend the links within China.
Date:
April 1, 1944
Creator:
Cottrell, R. L. A.; Granieri, C.; Fan, Lan; Xu, Rongsheng & Karita, Yukio
System:
The UNT Digital Library
The Eight New Synthetic Elements
In an early continuation of the investigation of the radioactive isotopes of element number 43 (technetium) Segre and Seaborg produced by the deuteron and neutron bombardment of molybdenum the isotope Tc{sup 99}, which they observed to decay by means of an isomeric transition with a half-life of 6.6 hours to a lower isomeric state with a half-life greater than 40 years. The upper isomeric state of this isotope was observed by Segre and C. S. Wu to be produced in the fission of uranium and more recently R. P. Schumann and also D. C. Lincoln and W. H Sullivan working on the Plutonium Project of the Manhattan District have independently observed the beta-particles of half-life about 10 years due to the lower isomeric state. Later work by E. E. Motta and G. E. Boyd sets a more accurate value of 9.4 x 10{sup 5} years for this half-life. Since this isotope is formed in rather large amounts, namely, a fission yield of 6.2%, in the slow neutron induced fission of uranium it is now possible to isolate technetium in weighable amounts and in rather substantial quantities. For example, a uranium pile operating at a power level of 10{sup 5} kw …
Date:
November 1, 1947
Creator:
Seaborg, Glenn T.
System:
The UNT Digital Library
The Eight New Synthetic Elements
None
Date:
November 1, 1947
Creator:
Seaborg, Glenn T.
System:
The UNT Digital Library
Production of Mesons by the 184-inch Berkeley Cyclotron
The authors have observed tracks which they believe to be due to mesons in photographic plates placed near a target bombarded by 380 Mev alpha particles. For a 10-minute exposure in the cyclotron, about 50 meson tracks are found along the 3-inch edge of a photographic plate. The mass has been determined by measuring the bending in the magnetic field and the range in emulsion. From the first 50 meson tracks measured they find a mass of 313 {+-} 16 electron masses. It is highly probable that these mesons are the heavy mesons described by Lattes, Occhialini, and Powell.
Date:
January 1, 1948
Creator:
Gardner, Eugene & Lattes, C. M. G.
System:
The UNT Digital Library
Stars in Photographic Emulsions Initiated by Deuterons Part II. Theoretical
The theory of high energy nuclear stars depends on a theory of nuclear transparency and on a theory of nuclear evaporation. The transparency can be computed on the basis of a model proposed by R. Serber as soon as the interactions between the nucleons and the incident particle are known. The evaporation can be computed on the basis of the statistical model of the nucleus as soon as the nuclear entropy and binding energies of the evaporated particles are known. The calculations have been formulated with approximate values for the above interactions, entropies, and binding energies; and by means of various mathematical methods: a method of averages, a method of reaction integrals, and one using diffusion equations. Probability distributions have been obtained for the number of prongs per star, and distributions are being computed for the energy and angle of a prong. The results are in qualitative agreement with the observations on photographic emulsions described in Part I.
Date:
January 1, 1948
Creator:
Horning, Wendell & Baumhoff, L.
System:
The UNT Digital Library
Nuclear Reactions of Arsenic with 190 Mev Deuterons
Isotopes formed in the bombardment of {sub 33}As{sup 75} with 190 Mev deuterons range in atomic number up to 24 (or more) mass units lighter than As{sup 75}. Identification of these isotopes was based on chemical behavior and half-life determination. Relative yields have been calculated and show that 80% of the observed reactions produce isotopes within 8 mass units of As{sup 75}. Three new isotopes have been observed: 9.5 d. Se{sup 72} (K), 44 m, Se{sup 71} ({beta}{sup +}), and 52 m, As{sup 71} ({beta}{sup +}).
Date:
January 21, 1948
Creator:
Hopkins Jr, H.H. & Cunningham, B.B.
System:
The UNT Digital Library
The Distribution of Radioactivity in the Mouse Following Administration of Dibenzanthracene Labeled in the 9 and 10 Positions with Carbon Fourteen
Dibenzanthracene, labeled in the 9 and 10 positions with carbon fourteen has been administered to mice intravenously and by stomach tube as an aqueous colloid, and intraperitoneally, subcutaneously, and by stomach tube in tricaprylin solution. The distribution of radioactivity in the mice at various time intervals after administration of the carcinogen has been determined. The radioactivity is rapidly eliminated, largely through the feces, and ordinarily very little is absorbed. The distribution and rate of elimination depends upon the mode of administration. There is an appreciable quantity of radioactivity in tumors produced several months after a single subcutaneous injection of dibenzanthracene. There appear to be no detectable effects from the radiation of the labeled carcinogen.
Date:
January 30, 1948
Creator:
Heidelberger, Charles & Jones, Hardin, B.
System:
The UNT Digital Library
Degradation of Isotopic Lactate and Acetate
A scheme of glucose degradation has been validated by the use of intermediates of known isotopic composition. In this scheme: glucose {yields} lactic acid {yields} CO{sub 2} (C-3,4) + acetic acid {yields} CO{sub 2} (C-2,5) + acetone {yields} iodoform (C-1,6) + acetate (C-1,6; 2,5), it was found that (a) in the oxidation of lactic acid, approximately 4.7% of the acetic acid was oxidized to CO{sub 2}; and (b) under the conditions prescribed, BaCO{sub 3} from the degradation of Ba acetate contained approximately 1.5% of the activity of the methyl group.
Date:
February 24, 1948
Creator:
Aronoff, S.; Haas, V. A. & Fries, B. A.
System:
The UNT Digital Library
Health and safety conference
This report provides a summary of the Health and Safety Conference held April 1948 at Chicago, Illinois. Representatives of Argonne National Laboratory, Rochester University, University of California Radiation Laboratory, Los Alamos Scientific Laboratory, New York Memorial Hospital, as well as a Canadian group and an United Kingdom group. Many topics were discussed some of which were plutonium in urine, toxicity of beryllium, and relative toxicity of radioelements.
Date:
April 1, 1948
Creator:
Rudolph, D.C.
System:
The UNT Digital Library
Production of Mesons by the 184-inch Berkeley Cyclotron Part I. Experimental Arrangement
The authors have observed traks which they believe to be due to mesons in photographic plates placed near a ta5rget bombarded by 380 Mev alpha particles. The plates used were Ilford Nuclear Research Plates, type C.2. the identification of the particles responsible for the tracks was first made on the basis of the appearance of the tracks; they show the same type of scattering and variation of grain density with residual range found in cosmic ray meson tracks and about two-thirds of them produce observable stars at the end of their range. For a 10-minute exposure in the cyclotron, about 50 meson tracks are found along the 3-inch edge of a photographic plate. Carbon, beryllium, copper, and uranium have been used so far as target materials, and all are found to give mesons. When a carbon target was bombarded with 300 Mev alpha particles, mesons were found but with reduced yield.
Date:
April 1, 1948
Creator:
Gardner, Eugene & Lattes, C. M. G.
System:
The UNT Digital Library
The Formation of U232 by Helium Ions of Thorium
The production of U{sup 232} by the sum of {alpha},4n and {alpha},p 3n reactions on thorium has been studied. The cross section at an average energy of 37.5 Mev was 0.013 barns and the threshold for the reaction was about 30 Mev.
Date:
April 14, 1948
Creator:
Newton, Amos S.
System:
The UNT Digital Library
The Fission of Thorium with Alpha Particles
The fission distribution of fission of thorium with alpha particle of average energy 37.5 Mev has been measured by the chemical method. The distribution found shows that the characteristic dip in the fission yield mass spectrum has been raised to within a factor of two of the peaks compared to a factor of 600 in slow neutron fission of U{sup 235}. The raise in the deip has caused a corresponding lowering in fission yield of these elements at the peaks. The cross section for fission of thorium with 37.5 Mev alphas was found to be about 0.6 barn, and the threshold for fission was found to be 23 to 24 Mev.
Date:
April 15, 1948
Creator:
Newton, Amos S.
System:
The UNT Digital Library
Meeting XI Bevatron Research Conference
It will be desirable to have a general purpose bending magnet available for use with the Bevatron. The design discussed, while tentative, is believed to incorporate most of the desired properties for use with the external beam.
Date:
January 12, 1954
Creator:
Wenzel, William A.
System:
The UNT Digital Library
Investigation of Gamma Sterilization. Final Report for the Period July 1, 1953 through June 30, 1954. Research Report No. 3-54
None
Date:
October 1, 1954
Creator:
Denny, C. B.; Bohrer, C. W. & Reed, J. M.
System:
The UNT Digital Library
UTILIZATION OF GROSS FISSION PRODUCTS. SUMMARY REPORT FOR PERIOD FEBRUARY 1, 1952-JUNE 30, 1954
None
Date:
October 31, 1955
Creator:
unknown
System:
The UNT Digital Library
SPECIAL HEAT TRANSFER PHENOMENA FOR SUPERCRITICAL FLUIDS
Present-day knowledge concerning the molecular structure of supercritical fluids is briefly reviewed. It is shown that liquid-like and gas-like phases may coexist at supercritical pressures, although they may not be in equllibrium with each other. it is postulated that on the basis of the coexistence of these two phases a "boiling-like" phenomenon may provide the mechanism of heat transfer to supercritical fluids at high heat fluxes and certain other conditions. An unusual mode of heat transfer was actually observed at supercritical pressures during tests which produced the high heat fluxes and other conditions under which such "boiling" would be expected. The tests and the various conditions are briefly described. An emission of high-frequeney, high-intensity sounds usually accompanied these tests. It is shown that similar screaming sounds were heard during boiling at subcritical pressures, giving further support to the hypothesis that "boiling" may occur at supercritical pressures. A seeond possible explanation for the unusual mode of heat transfer is based on boundarylayer stability considerations. At high heat fluxes large density differences exist between the bulk of the fluid and the fluid in the boundary layer near the wall. A breakdown of the boundary layer may be caused by the build-up of …
Date:
January 1, 1956
Creator:
Goldmann, K
System:
The UNT Digital Library
A Wide Bandwidth Telemetry System
This paper will describe a telemetry system which has a bandwidth of 250 mgacples, the uses to which it has been put and possible future uses.
Date:
August 1, 1956
Creator:
Henry, David E & Glass, R. E.
System:
The UNT Digital Library
Fused-Salt Heat Transfer
This paper presents, in two parts, a general discussion of fused-salt heat transfer. The first part is a report on current experimental results with three new salts - an alkali metal-base fluoride, a zirconium-base fluoride, and an alkali metal nitrate-nitrite mixture known as 'HTS'. In the second part fused salts are compared with liquid metals on the basis of their heat transfer effectiveness as reactor coolants. An analysis is presented for a general solid fuel-element reactor which transfers its heat to a fluid boiling on the outside of the heat exchanger tubes. The results show that fused salts can be as good heat transfer media as liquid metals. (auth)
Date:
November 1, 1956
Creator:
Hoffman, Herbert W.
System:
The UNT Digital Library
Some heat transfer and fluid friction experiments with supercritical water
None
Date:
November 1, 1956
Creator:
Randall, David G.
System:
The UNT Digital Library
Catalysts for Recombination of Radiolytic Gases Over Thorium Oxide Slurries
None
Date:
December 12, 1956
Creator:
Morse, L. E.
System:
The UNT Digital Library
Minutes of third meeting of committee on use of Nevada Test Site
The Nevada Test Site (NTS) Use Committee met Tuesday morning, May 28, 1957, at Mercury, Nevada. This document provides a summary of the meeting.
Date:
May 28, 1957
Creator:
Lindquist, C. L.
System:
The UNT Digital Library
Graphite radiation damage as a reactor operational problem
Radiation Damage to the graphite moderator has played an important role in the history of reactor operation at Hanford. The operational problems, potential and real, which result from dimensional instability, stored energy, and gasification, as well as the solutions to these problems are discussed. The key to the graphite problems is operating temperature and its control. At present, stack expansion remains in the fringe regions of the original reactors, which coupled with the contraction of the central region gives rise to curvature problems in the top portion of the reactors. Stored energy is not a safety hazard because the release spectrum is such that a spontaneous and self sustained release cannot occur. Oxidation of the graphite moderator is controlled by maintaining operating temperature of the stack such that no significant amount of oxidation occurs.
Date:
April 14, 1958
Creator:
Curtiss, D. H.
System:
The UNT Digital Library
Aqueous Decontamination of Plutonium From Fission Product Elements
None
Date:
June 1, 1958
Creator:
Winchester, R. S. & Maraman, W. J.
System:
The UNT Digital Library