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Program SIGMA1 (version 79-1): Doppler broaden evaluated cross sections in the evaluated nuclear data file/version B (ENDF/B) format

Description: Program SIGMA1 Doppler-broadens evaluated cross sections in the ENDF/B format. The program requires that input cross sections be tabulated as linearly interpolable functions of energy in ENDF/B File 3; broadened cross sections, in this same form, replace the original values in the output tape. This report describes the methods used in the code and serves as a user's guide. A listing of the source deck is available on request.
Date: October 31, 1979
Creator: Cullen, D.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

STRONTIUM-90 FUELED THERMOELECTRIC GENERATOR POWER SOURCE--FIVE-WATT U.S. NAVY WEATHER STATION. Final Report

Description: The SNAP-7C 10-watt Sr/sup 90/ thermoelectric generator, the converter, batteries, and weather station housing that were delivered to Antarctica in December 1961 are described. Thermoelectric analysis, thermal analysis, fuel form and shielding requirements, generator assembly, electrical system, operational tests, and environmental testing are discussed. (M.C.G.)
Date: October 31, 1963
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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IMPROVED DESIGN FOR FUEL HANDLING ON SODIUM GRAPHITE POWER REACTORS

Description: Operational experience at the SRE and evaluation of alternate methods resulted in the development of an optimized fuel-handling system for the Hallam Nuclear Power Facility Beactor. Increased reliability, easier maintenance, improved safeguards, and broader flexibility are some of the characteristics of this system, which features a manually-operated, shielded cask with reactor atmosphere seals that is usable in a conventional unshielded air-atmosphere building. (auth)
Date: October 31, 1962
Creator: Edziak, T.F.; Crosgrove, R.O. & Stolz, J.F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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SNAP Radioisotope Space Programs Task 7. Quarterly Progress Report No. 7, April 1 Through June 30, 1961

Description: Safety analyses of the launch of SNAP-type units as to launch, ascent, and intermediate or final-stage failures are reported. A preliminary design study to define the configuration and performance of the Surveyor generator is completed. Dispersion patterns are found for radioactive materials released by the high-velocity vertical impact of Surveyor-type generators on the moon. High- velocity testing methods are discussed. Flare and telemetry capsules, designed to simulate fuel cores of nuclear … more
Date: October 31, 1962
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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SNAP Programs. Quarterly Progress Report No. 6, January 1 through March 31, 1961. Task 6. Fuel Technology Development Program

Description: Isotope power sources are being developed for use in thermionic and thermoelectric power generators for space applications. Suitable radioisotope fuels and heat source containment capsules are being designed for SNAP-type generators with land, sea and space applications. Curium242 and Plutonium-238 are currently being investigated, and methods for purification, compound conversion and fuel form are being established. A Heavy Elements Processing Facility capable of handling and preparing gram qu… more
Date: October 31, 1962
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Program RECENT (version 79-1): reconstruction of energy-dependent neutron cross sections from resonance parameters in the ENDF/B format. [In FORTRAN IV for CDC-7600 and Cray-1]

Description: Program RECENT reconstructs energy-dependent neutron total, elastic, capture, and fission cross sections from a combination of resonance parameters and tabulated background cross sections in the ENDF/B format. Entire evaluations, not just cross sections, are written to the result file, which is in ENDF/B format. The output includes the original resonance parameters in a form that can be used in Doppler broadening and self-shielding calculations. A listing of the source deck is available on requ… more
Date: October 31, 1979
Creator: Cullen, D.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Shielding analysis and design of the KIPT experimental neutron source facility of Ukraine.

Description: Argonne National Laboratory (ANL) of USA and Kharkov Institute of Physics and Technology (KIPT) of Ukraine have been collaborating on the conceptual design development of an experimental neutron source facility based on the use of an electron accelerator driven subcritical (ADS) facility [1]. The facility uses the existing electron accelerators of KIPT in Ukraine. The neutron source of the sub-critical assembly is generated from the interaction of 100 KW electron beam with a natural uranium tar… more
Date: October 31, 2008
Creator: Zhong, Z.; Gohar, M. Y. A.; Naberezhnev, D. & Duo, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An evaluation of simple iron-water radiation shields and radiation measurements within concrete-lined and -capped pits

Description: Program 3 of Operation BREN consisted in a study of the performance of biological shields composed of various arrangements of steel, water, and borated polyethylene in spherical, cubical, and parallelepipedal geometries. Studies were also made of the radiation levels within concrete-lined and -capped pits, 4 ft in dia and 8 ft deep. The principal radiation source was the ORNL Health Physics Research Reactor, an unshielded, unreflected, 90 wt % U-10 wt % Mo, cylindrical bare-metal assembly. It w… more
Date: July 31, 1964
Creator: Muckenthaler, F. J.; Jung, L.; Blosser, T. V.; Freestone, R. M. Jr. & Miller, J. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

LLL evaluated-nuclear-data library (ENDL): graphs of cross sections from the library. [Basic data for transport calculations]

Description: Graphs of neutron cross sections and related parameters for the LLL ENDL are presented. LLL and others use the evaluated nuclear data given here for neutron transport and related calculations. This document presents data contained in the library as of October 31, 1978. Evaluations of 79 nuclides/elements have been changed since the 1976 edition. Five tables discuss the information in the report, while the cross sections themselves are included on six microfiche.
Date: October 31, 1978
Creator: Howerton, R.J.; Cullen, D.E.; MacGregor, M.H.; Perkins, S.T. & Plechaty, E.F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Theoretical interpretation of high-Z discs irradiated with 1. 06. mu. laser light

Description: High Z discs have been irradiated with 1.06 ..mu.. laser light at intensities between 7 x 10/sup 13/ and 3 x 10/sup 15/ W/cm, and pulse lengths between 200 and 1000 ps. Due to the high Z, inverse bremsstrahlung becomes an important absorption effect and competes strongly with resonance absorption and stimulated scattering. We find that inhibited electron thermal conduction and non-LTE ionization physics are important. Their inclusion in the LASNEX modeling results in steepened temperature and d… more
Date: March 31, 1978
Creator: Rosen, M.D.; Mead, W.C.; Thomson, J.J. & Kruer, W.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Target station design for a 1 MW pulsed spallation neutron source

Description: Target stations are vital components of the 1 MW, next generation spallation neutron source proposed for LANSCE. By and large, target stations design determines the overall performance of the facility. Many traditional concepts will probably have to be rethought, and many new concepts will have to be put forward to meet the 1 MW challenge. This article gives a brief overview of the proposed neutron spallation source from the target station viewpoint, as well as the general philosophy adopted fo… more
Date: December 31, 1993
Creator: Russell, G. J.; Baker, G. D. & Brewton, R. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Californium-252 progress, report No. 7, April 1971

Description: This report contains discusses of the following topics on Californium-252: First sales of californium-252; encapsulation services discussed; three new participants in market evaluation program; summer training programs to use californium; Californium-252 shipping casks available; Californium-252 questions and answers, radiotherapy; neutron radiography; natural resources exploration; nuclear safeguards; process control; dosimetry; neutron radiography; neutron shielding; and nuclear safeguards.
Date: December 31, 1971
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Positron Emission Tomography-Scanner at Children`s Hospital of Michigan at Detroit, Michigan

Description: The Department of Energy has prepared an environmental assessment (EA), DOE/EA-0795, to support the DOE decision to provide a grant of $7,953,600 to be used in support of a proposed Positron Emission Tomography Scanner at Children`s Hospital of Michigan at Detroit, Michigan. Based upon the analysis in the EA, DOE has determined that the proposed action is not a major Federal action significantly affected the quality of the human environment within the meaning of the National Environmental Polic… more
Date: December 31, 1992
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Magnetic flux shielding for the precision muon g-2 storage ring superconducting inflector

Description: A muon g-2 experiment (E821) at the AGS requires knowledge of the magnetic field over muon orbits at the level of 0.1 ppM. The superconducting inflector involves a double cosine theta winding; this design approximately cancels its fringe field. Nevertheless its residual field would effect the homogeneity of the storage ring magnetic field. A method of using a superconducting sheet surrounding the inflector to further reduce the fringe field was proposed by one of the authors, W. Meng. An experi… more
Date: December 31, 1993
Creator: Danby, G. T.; Meng, W.; Sampson, W. B. & Woodle, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Improved semi-analytic algorithms for finding the flux from a cylindrical source

Description: Hand calculation methods for radiation shielding problems continue to be useful for scoping studies, for checking the results from sophisticated computer simulations and in teaching shielding personnel. This paper presents two algorithms which give improved results for hand calculations of the flux at a lateral detector point from a cylindrical source with an intervening slab shield parallel to the cylinder axis. The first algorithm improves the accuracy of the approximate flux flux formula of … more
Date: December 31, 1992
Creator: Wallace, O. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

An analysis of the finite-differenced, even-parity discrete-ordinates equations in slab geometry

Description: Considerable effort has been expended in recent years in finding improved spatial differencing schemes for the neutron and radiation transport equations. Standard criteria used to select a candidate scheme are its order of spatial convergence for small mesh size and its positivity in the sense that positive solutions emerge from positive input data. More recently, it has become clear that truly robust schemes must behave well in diffusing regions and must be compatible with an effective iterati… more
Date: January 31, 1990
Creator: Miller, W. F. Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Grounding and shielding in the accelerator environment

Description: Everyday features of the accelerator environment include long cable runs, high power and low level equipment sharing building space, stray electromagnetic fields and ground voltage differences between the sending and receiving ends of an installation. This paper pictures some Fermilab installations chosen to highlight significant features and presents practices, test methods and equipment that have been helpful in achieving successful shielding. Throughout the report are numbered statements aim… more
Date: December 31, 1991
Creator: Kerns, Q.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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An overview of the current status of resonance theory in reactor physics applications

Description: The neutron resonance phenomena constitute one of the most fundamental subjects in nuclear physics as well as in reactor physics. It is the area where the concepts of nuclear interaction and the treatment of the neutronic balance in reactor lattices become intertwined. The later requires the detailed knowledge of resonance structures of many nuclide of practical interest to the development of nuclear energy. The key issue of the resonance treatment in reactor applications is directly associated… more
Date: December 31, 1993
Creator: Hwang, R. N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Criticality accident detector coverage analysis using the Monte Carlo Method

Description: As a result of the need for a more accurate computational methodology, the Los Alamos developed Monte Carlo code MCNP is used to show the implementation of a more advanced and accurate methodology in criticality accident detector analysis. This paper will detail the application of MCNP for the analysis of the areas of coverage of a criticality accident alarm detector located inside a concrete storage vault at the Savannah River Site. The paper will discuss; (1) the generation of fixed-source re… more
Date: December 31, 1993
Creator: Zino, J. F. & Okafor, K. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Continuous Energy, Multi-Dimensional Transport Calculations for Problem Dependent Resonance Self-Shielding

Description: The overall objective of the work here has been to eliminate the approximations used in current resonance treatments by developing continuous energy multi-dimensional transport calculations for problem dependent self-shielding calculations. The work here builds on the existing resonance treatment capabilities in the ORNL SCALE code system.
Date: March 31, 2009
Creator: Downar, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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