Showing papers in "Journal of Nuclear Materials in 1989"

TL;DR: The textor liners and limiters of TEXTOR have been coated in situ with a boron containing carbon film using a RG discharge in a throughflow of 0.8 He + 0.1 B2H6 +0.1 CH4 as mentioned in this paper.

TL;DR: Theoretical studies coupled with ion implantation and ion-beam analysis have provided a large body of new quantitative information on hydrogen interactions within metal matrices and at metal surfaces as discussed by the authors.

TL;DR: The lower temperature limit for void formation was found to lie between 182 and 220 °C, with a maximum swelling of about 0.5% at 300 to 350 °C and no swelling at 500 °C as mentioned in this paper.

TL;DR: In this paper, the authors present a review of the phenomena associated with the implantation of hydrogen isotopes into graphite and carbonized layers, with particular emphasis on the implanted layer, i.e., the depth range where the injected atoms are deposited.

TL;DR: The radiation-induced segregation of alloying elements (i.e., strong enrichment of Ni and Si, and often a relative depletion of Cr and/or Mo) appears to be the major factor affecting their formation and subsequent stability in such steels.

TL;DR: The state of knowledge of tritium retention in graphite and how it affects the operation of tokamak fusion reactors is reviewed in this paper, along with an assessment of the relative importance of each component for fusion reactors.

TL;DR: In this article, the thermal conductivity of fully dense, solid UO 2 between 773 and 3120 K is recommended, where k = (0.0375 + 2.165 × 10 −4 T ) −1 + 4.715 × 10 9 / T −2 exp[−16361/T ], where T is the temperature.

TL;DR: In this article, the in-situ deposition of amorphous hydrogenated carbon layers (a-C : H) and the resulting effects on tokamak plasmas are discussed in detail.

TL;DR: In this paper, a high intensity 30 keV Li beam is employed to measure radial profiles of impurity ion concentrations (e.g. He, C, 0) by charge exchange recombination spectroscopy.

TL;DR: In this article, an analysis of the uranium-zirconium alloy system has been performed and a phase diagram was calculated, and the results are compared with the available thermodynamic data and accepted phase diagrams and general agreement was found.

TL;DR: In this paper, the Gibbs energies of formation of the Mo-Ru and Mo-Pd systems were calculated and the relative partial molar Gibbs energies were measured by the EMF method with a Zr(Ca)O2 electrolyte.

TL;DR: In this paper, the behavior of UO 2 fuel from power reactors has been studied up to high burn-up (~ 60 GWd/tU), under both steady state and power transient conditions in the range of 35 to 48 kW/m.

TL;DR: In this paper, the Fourier transform of the defect correlation was analyzed in terms of a cascade size distribution taking into account the energy spectrum of the primary knocked on atoms, and no evidence for appreciable agglomeration of interstitials within a single cascade was observed.

TL;DR: A review of hydrogen and helium recycling phenomena in tokamaks with limiters and walls largely made out of carbon (graphite, a-C:H layers) is presented in this paper.

TL;DR: In this paper, the U4O9 in irradiated fuel was identified by the presence of diffuse extra reflections in electron diffraction and was attributed to rapid penetration of oxygen along grain boundaries coated with closely spaced fission gas microbubbles.

TL;DR: In this article, the authors compared results obtained with poloidal and toroidal limiters and discussed general problems of plasma edge physics which are independent of the limiter configuration, showing that a significant steepening of the scrape-off layer (SOL) occurs close to the main limiter, leading to a small heat load e-folding length of 5-8 mm.

TL;DR: In this article, the influence of the sintering conditions, such as milling time, compacting pressure, sinting temperature and pore former content, on the characteristics of (U, Pn)N pellets was systematically investigated.

TL;DR: In this article, the formation energy of small voids in nickel was determined using the embedded atom method (EAM) and the binding energies of helium and vacancies to the helium-void complexes were also determined.

TL;DR: In this paper, a one-dimensional, time dependent Lagrangian MHD code with the multifrequency group flux-limited diffusion model for the radiative energy transfer is used for the analysis of the energy transport in the ablative vapor shield.

TL;DR: In this paper, Li 2 O ZrO 2 and Li 2 CO 3 Zr O 2 mixtures with [Li] [Zr] ratios ranging from 1.0 to 15 were heated to temperatures of 775-1175 K. The progress of the reactions was followed by X-ray diffraction.

TL;DR: In this paper, the diffusion of hydrogen in the oxides of pure Zr and Zr−25 wt% Nb alloy has been investigated by means of hydrogen depth profiling Oxide films of ~1 μm were grown on the metal surfaces and were loaded with hydrogen, using ion-beam implantation, to give an implantation peak centered on a specific depth in the oxide layer.

TL;DR: In this paper, the JET scrape-off plasma during X-point discharges with L- and H-modes is described, and a local measurement of D ⊥ is obtained in the divertor region.

TL;DR: In this paper, the authors investigated the sensitivity of stainless steels to cold work and found that the sensitivity increases with the degree of cold work, and the sensitivity decreases with cold work.

TL;DR: In this article, a small punch (SP) test using miniaturized specimens has been performed for cryogenic austenitic steels at 4.2, 77 and 293 K to evaluate fracture toughness in a fusion material program.

TL;DR: In this paper, partial thermodynamic functions HH and SH for the Zr-O-H ternary solution were derived by applying a dilute solution model to the solubility data.

TL;DR: In this paper, a reevaluation of phase equilibria in the binary U-Al system has been performed as part of the ASM-NBS Binary Phase Diagram Evaluation Program.

TL;DR: In this article, tensile specimens of 9Cr-1MoVNb and 12Cr 1MoVW steels with up to 2% Ni were tested at room temperature after irradiation at 50 ° C to displacement-damage levels of up to 25 dpa in the High-Flux Isotope Reactor (HFIR).

TL;DR: In this article, the authors described the oxidation of unused CANDUTM UO2 fuel in air-steam mixtures in a closed system at 200 and 225°C.

TL;DR: In this article, surface roughness has been added into the TRIM and Embedded Atom Method (EAM) computer codes through the use of fractals, a geometric construct with noninteger dimension.

TL;DR: In this paper, a model of the hysteresis in the terminal solid solubility (TSS) of hydride-forming metals is extended to derive an expression for the solubability limit during cooldown in the presence of hydrogen and applied to rationalize the extant results on hydrogen charging.