Search Results

Advanced search parameters have been applied.
open access

System model for analysis of the mirror fusion-fission reactor

Description: This report describes a system model for the mirror fusion-fission reactor. In this model we include a reactor description as well as analyses of capital cost and blanket fuel management. In addition, we provide an economic analysis evaluating the cost of producing the two hybrid products, fissile fuel and electricity. We also furnish the results of a limited parametric analysis of the modeled reactor, illustrating the technological and economic implications of varying some important reactor de… more
Date: October 12, 1977
Creator: Bender, D.J. & Carlson, G.A.
Partner: UNT Libraries Government Documents Department
open access

Novel, convenient, and nonpersistent radiotracer for environmental and energy applications

Description: A newly-available radioisotopic system, /sup 172/Hf-/sup 172/Lu, has excellent potential for tracer applications in which nuclear data acquisition must be accomplished in real time. The 6.7-day half-life of /sup 172/Lu is sufficient for a large fraction of tracer experiments, and should allow the direct incorporation of /sup 172/Lu into tests that have traditionally utilized much longer-lived radionuclides. Since /sup 172/Lu is the daughter component of a radioisotope generator, however, its ef… more
Date: March 12, 1984
Creator: Grant, P.M.
Partner: UNT Libraries Government Documents Department
open access

Radiological design criteria for fusion power test facilities

Description: The quest for fusion power and understanding of plasma physics has resulted in planning, design, and construction of several major fusion power test facilities, based largely on magnetic and inertial confinement concepts. We have considered radiological design aspects of the Joint European Torus (JET), Livermore Mirror and Inertial Fusion projects, and Princeton Tokamak. Our analyses on radiological design criteria cover acceptable exposure levels at the site boundary, man-rem doses for plant p… more
Date: February 12, 1982
Creator: Singh, M.S. & Campbell, G.W.
Partner: UNT Libraries Government Documents Department
open access

Laser driven fusion fission hybrids

Description: The role of the fusion-fission hybrid reactor (FFHR) as a fissile fuel and/or power producer is discussed. As long range options to supply the world energy needs, hybrid-fueled thermal-burner reactors are compared to liquid metal fast breeder reactors (LMFBR). A discussion of different fuel cycles (thorium, depleted uranium, and spent fuel) is presented in order to compare the energy multiplication, the production of fissile fuel, the laser efficiency and pellet gain requirements of the hybrid … more
Date: July 12, 1977
Creator: Hansen, L. F. & Maniscalco, J. A.
Partner: UNT Libraries Government Documents Department
open access

Systematics of Alpha-Radioactivity

Description: Correlations of alpha-decay energies in terms of mass number and atomic number have been made for all of the alpha-emitting species now numbering over 100. For each element isotopes show increase in alpha-energy with decrease in mass number except in the region of 126 neutrons where there is an explainable reversal. This reversal has the effect of creating a region of relatively low alpha-energy and long half-life at low mass numbers for such elements as astatine, emanation, francium, and possi… more
Date: September 12, 1949
Creator: Perlman, I.; Ghiorso, A. & Seaborg, G. T.
Partner: UNT Libraries Government Documents Department
open access

Circumnuclear Star Clusters in the Galaxy Merger NGC 6240, Observed with Keck Adaptive Optics and HST

Description: We discuss images of the central {approx} 10 kpc (in projection) of the galaxy merger NGC 6240 at H and K{prime} bands, taken with the NIRC2 narrow camera on Keck II using natural guide star adaptive optics. We detect 28 star clusters in the NIRC2 images, of which only 7 can be seen in the similar-spatial-resolution, archival WFPC2 Planetary Camera data at either B or I bands. Combining the NIRC2 narrow camera pointings with wider NICMOS NIC2 images taken with the F110W, F160W, and F222M filter… more
Date: February 12, 2007
Creator: Pollack, L K; Max, C E & Schneider, G
Partner: UNT Libraries Government Documents Department
open access

The Redshift Dependence of Gamma-Ray Absorption in the Environments of Strong-Line AGNs

Description: The case of {gamma}-ray absorption due to photon-photon pair production of jet photons in the external photon environments, such as the accretion disk and the broad-line region radiation fields, of {gamma}-ray--loud active galactic nuclei (AGNs) that exhibit strong emission lines is considered. I demonstrate that this 'local opacity,' if detected, will almost unavoidably be redshift-dependent in the sub-TeV range. This introduces nonnegligible biases and complicates approaches for studying the … more
Date: November 12, 2007
Creator: Reimer, A. & /Stanford U., HEPL /KIPAC, Menlo Park
Partner: UNT Libraries Government Documents Department
open access

Physics division annual report 2005.

Description: This report highlights the research performed in 2005 in the Physics Division of Argonne National Laboratory. The Division's programs include operation of ATLAS as a national user facility, nuclear structure and reaction research, nuclear theory, medium energy nuclear research and accelerator research and development. The mission of Nuclear Physics is to understand the origin, evolution and structure of baryonic matter in the universe--the matter that makes up stars, planets and human life itse… more
Date: March 12, 2007
Creator: Glover, J. & Physics
Partner: UNT Libraries Government Documents Department
open access

Mixed ligand chelate therapy for plutonium and toxic metals from energy power production. Progress report, October 15, 1978-October 14, 1979

Description: It is shown that a mixed ligand chelate (MLC) is superior to that of the primary chelate alone for the decorporation of monomeric plutonium. Thus, EDTA plus Tiron reduces the level of Pu in the skeleton to about 40% less than that of EDTA alone when treatment was begun two hrs post /sup 239/Pu. However, DTPA alone was still superior to EDTA/Tiron under the given experimental conditions. However, this appears to be due to the rapid metabolic destruction of secondary chelants such as Tiron and si… more
Date: July 12, 1979
Creator: Schubert, J.
Partner: UNT Libraries Government Documents Department
open access

Cryopumping hydrogen isotope mixtures in MFTF-B with and without argon adsorbent

Description: Mixtures of hydrogen isotopes, primarily deuterium (D/sub 2/), protium-deuterium (HD), and protium (H/sub 2/) must be pumped by the vacuum system in the Mirror Fusion Test Facility at Lawrence Livermore National Laboratory. In this study, we used argon as an adsorbent for cryopumping these isotopes at 4.2 K and found that deuterium will displace already adsorbed protium. Thus, when we pump mixtures of the two, sufficient argon must be supplied to adsorb both species. We also found that without … more
Date: February 12, 1985
Creator: Schumacher, B.J. & Call, W.R.
Partner: UNT Libraries Government Documents Department
open access

A neutron portal monitor for vehicles

Description: We have designed and built a portal vehicle monitoring systems for detecting neutron-emitting special nuclear material (SNM) such as plutonium. Monte Carlo calculations were used to optimize the design of the 15-cm-deep x 122-cm-high x 244-cm-long detector chambers, which utilize /sup 3/He proportional counters inside a hollow polyethylene box. Results for a variety of parametric studies, including polyethylene thickness and detector number, are described. Our experimental measurements are in g… more
Date: July 12, 1987
Creator: Coop, K. L.; Fehlau, P. E. & Atwater, H. F.
Partner: UNT Libraries Government Documents Department
open access

(Theoretical study of pion and kaon photoproduction in nuclei). Final technical report

Description: The contract work was initiated by J. Epstein. The emphasis of the proposal was on (a) the continuation of DWIA calculations of the (..gamma..,..pi../sup + -/) reaction in the ..delta..(1232) region with the extension to the (..gamma..,..pi../sup 0/) reaction and (b) the application of the DWIA approach to the (..gamma..,K) reaction. The (..gamma..,..pi../sup 0/) work was intended to be in close collaboration with the experimental studies underway at Bates Linear Accelerator and the (..gamma..,… more
Date: December 12, 1984
Creator: Booth, E.C.
Partner: UNT Libraries Government Documents Department
open access

The ground state mass of /sup 147/Gd from single-neutron transfer reactions

Description: Thin targets of radioactive /sup 148/Gd were used to determine a precise value for the mass of /sup 147/Gd. The (p,d), (d,t), and /sup 3/He,..cap alpha..) reactions were used with high-resolution charged-particle spectrometry to determine Q-values for the /sup 148/Gd target relative to several calibration targets having known Q-values. By combining the measured Q-value with the /sup 148/Gd mass, the mass defect, ..delta..M(/sup 147/Gd) = 75356 +- 6 keV, 149 keV less than the value in the 1977 m… more
Date: October 12, 1984
Creator: Mann, L. G.; Decman, D. J.; Massey, T. N.; Struble, G. L.; Sisson, D. H.; Henderson, C. M. et al.
Partner: UNT Libraries Government Documents Department
open access

Extraction of tritium from liquid lithium by permeation

Description: This paper assesses a method for extracting tritium from liquid lithium for specific application to the conceptual laser fusion reactor that uses a continuous lithium ''waterfall.'' The tritium diffuses through a refractory metal that contains a getter and is then stored in a hydride-forming alloy. There are various uncertainties with this method including helium-4 extraction, unknown impurities that may accumulate in liquid lithium, the effects of these impurities on tritium separation, and th… more
Date: April 12, 1978
Creator: Alire, R.M.
Partner: UNT Libraries Government Documents Department
open access

Monosodium titanate particle characterization

Description: A characterization study was performed on monosodium titanate (MST) particles to determine the effect of high shear forces expected from the In-Tank Precipitation (ITP) process pumps on the particle size distribution. The particles were characterized using particle size analysis and scanning electron microscopy (SEM). No significant changes in particle size distributions were observed between as-received MST and after 2--4 hours of shearing. Both as-received and sheared MST particles contained … more
Date: January 12, 1993
Creator: Chandler, G. T. & Hobbs, D. T.
Partner: UNT Libraries Government Documents Department
open access

Assessment of the radiological impact of coal utilization. I. Preliminary studies on Western coal. [Western USA; radionuclide impurities]

Description: It was the purpose of this project to broadly survey pathways of radionuclides in the coal fuel cycle, identifying critical questions and providing direction for subsequent, definitive studies of radionuclides in coal and the technological enhancement of concentrations of naturally occurring radionuclides through use of this coal. Western coal was selected for study because of its prominence in the National Energy Plan. Specific objectives were to: investigate the fate of radionuclides in the c… more
Date: February 12, 1979
Creator: Styron, C. E.; Casella, V. R.; Farmer, B. M.; Hopkins, L. C.; Jenkins, P. H.; Phillips, C. A. et al.
Partner: UNT Libraries Government Documents Department
open access

Radiation measurements in the North arc: November 1986 through April 1987

Description: This paper is an effort to share preliminary data on radiation measurements. Measurements were made using passive lithium-flouride thermoluminescent dosimeters (TLD) placed in the North arc during the start-up period of the Stanford Linear Collider (SLC). Li-7 dosimeters were used for ionizing radiation measurements, and Li-6 dosimeters moderated by polyethylene were used for measuring neutrons. In addition, some measurements were made near alcove N-6 using a Cs-137 gamma-ray source in order to… more
Date: May 12, 1987
Creator: Jenkins, T.M.; Benson, E.; Ipe, N. & Gearhart, R.A.
Partner: UNT Libraries Government Documents Department
open access

The less familiar elements in the Atomic Energy program

Description: Many factors are responsible for the rapid growth of analytical chemistry during the past ten to fifteen years (This report was written in 1953). One of the most important of these factors is the greatly increased significance to present day chemistry of many elements that in the recent past were principally chemical curiosities. Since the Atomic Energy program is concerned with many such elements, it is of interest to discuss the cause for this concern and the resulting effect on the field of … more
Date: October 12, 1953
Creator: Bushey, A. H.
Partner: UNT Libraries Government Documents Department
open access

Ab Initio Calculations Of Light-Ion Reactions

Description: The exact treatment of nuclei starting from the constituent nucleons and the fundamental interactions among them has been a long-standing goal in nuclear physics. In addition to the complex nature of nuclear forces, one faces the quantum-mechanical many-nucleon problem governed by an interplay between bound and continuum states. In recent years, significant progress has been made in ab initio nuclear structure and reaction calculations based on input from QCD employing Hamiltonians constructed … more
Date: March 12, 2012
Creator: Navratil, P; Quaglioni, S; Roth, R & Horiuchi, W
Partner: UNT Libraries Government Documents Department
open access

Issues in radioactive-waste management for fusion power

Description: Analysis of recent conceptual designs reveals that commercial fusion power systems will raise issues of occupational and public health and safety. This paper focuses on radioactive wastes from fusion reactor materials activated by neutrons. The analysis shows that different selections of materials and neutronic designs can make differences in orders-of-magnitude of the kinds and amounts of radioactivity to be expected. By careful and early evaluation of the impacts of the selections on waste ma… more
Date: October 12, 1982
Creator: Maninger, R. C. & Dorn, D. W.
Partner: UNT Libraries Government Documents Department
open access

TMAP4 User's Manual

Description: The Tritium Migration Analysis Program, Version 4 (TMAP4) has been developed by the Fusion Safety Program at the Idaho National Engineering Laboratory (INEL) as a safety analysis code, mainly to analyze tritium retention and loss in fusion reactor structures and systems during normal operation and accident conditions. TMAP4 incorporates one-dimensional thermal- and mass-diffusive transport and trapping calculations through structures and zero dimensional fluid transport between enclosures and a… more
Date: June 12, 1992
Creator: Longhurst, G. R.; Holland, D. F.; Jones, J. L. & Merrill, B. J.
Partner: UNT Libraries Government Documents Department
open access

Soil moisture studies based on wells at 32-49 coordinates

Description: Progress is reported in a limited study to measure the soil-moisture relationships at the Hanford site. Some of the tests have been conducted or are in progress using soil samples from a site located at the 32-49 Hanford Coordinates. Sections are included on original studies on well 32-49A, tritium assays of soil samples from wells at 32-49 coordinates, installation of sensors to the water table, and soil-moisture models. (JRD)
Date: January 12, 1971
Creator: Brownell, L. E.
Partner: UNT Libraries Government Documents Department
open access

7Be(p,gamma)8B S-factor from Ab Initio Wave Functions

Description: There has been a significant progress in ab initio approaches to the structure of light nuclei. Starting from realistic two- and three-nucleon interactions the ab initio no-core shell model (NCSM) predicts low-lying levels in p-shell nuclei. It is a challenging task to extend ab initio methods to describe nuclear reactions. We present here a brief overview of the first steps taken toward nuclear reaction applications. In particular, we discuss our calculation of the {sup 7}Be(p,{gamma}){sup 8}B… more
Date: October 12, 2006
Creator: Navratil, P; Bertulani, C A & Caurier, E
Partner: UNT Libraries Government Documents Department
Back to Top of Screen