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Absence of molecular deuterium dissociation during room-temperature permeation into polystyrene ICF target shells

Description: Polystyrene microshells filled with deuterium and tritium gas are important target shells for inertially confined fusion (ICF) and are particularly promising for target containing spin-polarized hydrogens fuels. A currently active approach to the latter uses polarized D in HD, in a method which requires preservation of the high purity of the initially prepared HD (very low specified H{sub 2} and D{sub 2} concentrations). This would not be possible if dissociation should occur during permeation … more
Date: January 1, 1991
Creator: Honig, A.; Alexander, N.; Fan, Q.; Gram, R. & Kim, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analyses of corium spreading in Mark I containment geometry

Description: An assessment of melt spreading in the Mark I system has been carried out using the MELTSPREAD-1 computer code together with supporting analyses. Application of MELTSPREAD-1 confirms the calculation of shell survival in a wet containment for the most probable melt release conditions from NUREG/CR-5423. According to MELTSPREAD-1, a dry containment also may not be threatened by melt spreading. This reflects the heat losses undergone by the melt in the process of spreading to the shell conservativ… more
Date: January 1, 1991
Creator: Sienicki, J. J.; Chu, C. C. & Farmer, M. T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Particulate and Iodine Removal Analysis for HTGR Containments

Description: The removal of aerosol particles and iodine in the containment vessel of an HTGR following a loss-of-coolant accident was examined for two hypothetical accidents; the Design Basis Depressurization Accident (DBDA) and the Maximum Hypothetical Fission Product Release (MHFPR). Current containment cleanup system designs and others were evaluated. The HAARM-2 computer model was adapted to describe aerosol behavior and to predict the consequences of the postulated accidents and to predict the time de… more
Date: July 1976
Creator: Gieseke, J. A.; Schmidt, E. W.; Baybutt, P.; Jordan, H. & Postma, A. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A technique for shell compression measurements of laser fusion targets by neutron activation of a rubidium tracer

Description: At the Nova Laser, the activation of a rubidium tracer incorporated in the shell of ICF targets has become a standard diagnostic technique for measuring the compressed shell areal density {l angle}{rho}{Delta}R{r angle}. The isotope {sup 85}Rb is activated by 14 MeV implosion neutrons to produce the isomer {sup 84m}Rb(t{sub {1/2}} = 20.5 min) which is used to determine the shell {l angle}{rho}{Delta}R{r angle} while the radioactive isotope {sup 86}Rb(t{sub 1/2} = 18.8 d) is used to determine th… more
Date: December 7, 1990
Creator: Lane, S.M. & Nelson, M.B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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CORCON: a computer program for modelling molten fuel/concrete interactions. [PWR; BWR]

Description: A computer program modelling the interaction between molten core materials and structural concrete is being developed to provide a capability for making quantitative estimates of reactor fuel-melt accidents. The principal phenomenological models, inter-component heat transfer, concrete erosion, and melt/gas chemical reactions, are described. A code test comparison calculation is discussed.
Date: January 1, 1980
Creator: Muir, J.F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Impact properties and fabricability of thin-walled capsules of Pt--30% Rh--8% W

Description: Spherical shells of Pt3008 (Pt-30 percent Rh-8 percent W) with a wall thickness of 0.635 mm and a diameter of 40.7 mm were readily fabricated as capsules for 78 percent theoretically dense ThO/sub 2/ spheres. The spherical assemblies, encased in graphite, were impacted against granite at velocities of 76.2 to 89.5 m/sec. Because the ThO/sub 2/ was successfully contained by the Pt3008 at impact temperatures of 760, 1000, and 1250/sup 0/C, the alloy can be seriously considered as the container fo… more
Date: December 1, 1976
Creator: Inouye, H.; Heestand, R. L. & Liu, C. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Preliminary model for core/concrete interactions. [PWR and BWR]

Description: A preliminary model is described for computing the rate of penetration of concrete by a molten LWR core. Among the phenomena included are convective stirring of the melt by evolved gases, admixture of concrete decomposition products to the melt, chemical reactions, radiative heat loss, and variation of heat transfer coefficients with local pressure. The model is most applicable to a two-phase melt (metallic plus oxidic) having a fairly high metallic content.
Date: August 1, 1977
Creator: Murfin, W. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Carolinas Virginia Tube Reactor (Cvtr) in-Plant Testing Project.

Description: This report gives a description of a project which provides realistic information on containment system behavior that can be used to evaluate and improve analytical and experimental techniques thus allowing increased confidence in applying such technique to safety analysis of nuclear power plants.
Date: January 1, 1969
Creator: Norberg, J.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Experimental Buckling Investigation of Ring-Stiffened Cyclindrical Shells Under Unsymmetrical Axial Loads

Description: Six steel shells having nuclear containment-like features were fabricated and loaded to failure with an offset axial load. The shells of R/t = 500 buckled plastically. Four of the shells had reinforced circular cutouts. These penetrations were sized to cut no ring-stiffener, a single, two- or three-ring stiffeners. Reinforcing and framing around the penetrations were based upon the area-replacement rule of the applicable portion of the American Society for Mechanical Engineers (ASME) Boiler and… more
Date: January 1, 1983
Creator: Baker, W. E.; Bennett, J. G. & Babcock, C. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Passive neutron-multiplication measurements

Description: We have developed an instrument to measure neutron multiplication by statistical analysis of the timing of neutrons emitted from fissionable material. This instrument is capable of repeated analysis of the same recorded data with selected algorithms, graphical displays showing statistical properties of the data, and preservation of raw data on disk for future comparisons. In our measurements we have made a comparison of the covariance to mean and Feynman variance to mean analysis algorithms to … more
Date: October 14, 1982
Creator: Zolnay, A.S.; Barnett, C.S. & Spracklen, H.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Tubular lap joints for wind turbine applications

Description: A combined analytical/experimental study of the strength of thick- walled, adhesively bonded PMMA-to-aluminum and E-glass/epoxy composite-to-aluminum tubular lap joints under axial load has been conducted. Test results include strength and failure mode data. Moreover, strain gages placed along the length of the outer tubular adherend characterize load transfer from one adherend to the other. The strain gage data indicate that load transfer is nonuniform and that the relatively compliant PMMA ha… more
Date: January 1, 1990
Creator: Reedy, E.D. Jr. & Guess, T.R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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