Showing papers in "Journal of Nuclear Materials in 1984"

TL;DR: PISCES as mentioned in this paper is a laboratory research facility at UCLA for the study of plasma material interactions in continuous operation at particle and heat fluxes expected in advanced fusion experiments and in nuclear reactors.

TL;DR: In this paper, the PDX divertor configuration has been converted from an open to a closed geometry to inhibit the return of neutral gas from the divertor region to the main chamber.

TL;DR: In this article, it was shown that all austenitic Fe-Ni-Cr alloys eventually swell during neutron irradiation at a rate of ~1%/dpa over a surprisingly large range of temperature.

TL;DR: In this article, self-diffusion in an α-zirconium single crystal was investigated over the temperature range 779 to 1128 K. Gaussian penetration curves were observed.

TL;DR: A review of the most important reactions of atomic and molecular hydrogen with the fusion edge plasma electrons and ions is presented in this paper, where an appropriate characterization of the considered collision processes, useful in plasma edge studies (evaluated cross sections, reaction rates, energy gain/loss per collision, etc.).

TL;DR: In this paper, precise measurements of hydrogen permeability and diffusivity were performed for some stainless steels and high temperature materials utilizing an extremely purified hydrogen under pressure of 0.001-0.1 MPa at temperatures between 500 and 1200 K. Most of the determined values of φ and D give good Arrhenius relationship against inverse temperature.

TL;DR: In this paper, it is suggested that helium atoms once arrived at a dislocation remain bound to the dislocation line but at the same time remain mobile within the dislocations core; the bubble nucleation behaviour in the core would thus be affected by the core structure of different dislocations.

TL;DR: In this article, a cubic cubic zirconolite (CaPuTi2O7) was stored near ambient temperature, at 575 K, and at 875 K until alpha decay doses as high as 61 × 1025 α/m3 were attained.

TL;DR: The findings of the panel to examine the possibility of developing and using materials with attractive radioactivation characteristics for applications in fusion power reactors are summarized.

TL;DR: In this article, the formation and interaction energies of bubbles and interstitial type metal defects are analyzed, and possible modes for the loop punching process are discussed, as well as additional conditions controlling loop punching for bubbles with radii larger than about 10 Burgers vectors.

TL;DR: In this paper, Beryllium was implanted at room temperature with deuterium at 500 and 1500 eV while the amount of D retained was measured as a function of incident fluence using nuclear reaction analysis.

TL;DR: In this paper, a SiC/graphite composite, tested only at 680K, suffered almost complete delamination as a result of swelling of the SiC and densification of the graphite.

TL;DR: In this article, the mass spectra of the reaction product on graphite induced by H0/D2+ irradiation was analyzed and it was concluded that the reaction by energetic hydrogen ions occurs at the inner surfaces whereas with irradiation with H 0/energetic ions CH3 is formed at the surface.

TL;DR: In this article, the stability of fine titanium carbide precipitates plays an important role in void swelling resistance for the cold-worked titanium-modified steels irradiated in EBR-II.

TL;DR: In this paper, the creep equations for cold-worked Zr-2.5 wt% Nb pressure tubes were developed from uniaxial creep tests and applied to CANDU reactors.

TL;DR: In this paper, mass analyzed thermal desorption spectroscopy along with surface characterization was performed by X-ray photoelectron spectrographs for the release of hydrogen, deuterium and tritium into pyrolytic graphite.

TL;DR: In this article, neutral injection into divertor discharges shapes the plasma profiles to such an extent that transport is affected and confinement is improved, and a decisive parameter seems to be the electron temperature or resistivity at the edge.

TL;DR: In this paper, the effects of an anisotropic dislocation structure on the irradiation creep rate was investigated, and it was found that the anisotropy of the dislocations structure caused an increase in the creep rate in the direction where there is an excess of dislocation line directions.

TL;DR: In this paper, postirradiation annealing tests were conducted at temperatures of 1200°, 1350°, and 1500°C on five designs of TRISO-coated fuel particles for use in high-temperature gas-cooled reactors.

TL;DR: The state of knowledge of plasma driven permeation of hydrogen is reviewed, and its probable impact on tritium permeation through first walls and in-vessel components of magnetic fusion reactors is assessed as discussed by the authors.

TL;DR: In this article, the ASDEX divertor was used to measure the flux of neutral particles to the wall, the plasma flux to the neutralizer plates and the electron temperature and density.

TL;DR: In this paper, the roles of nickel, chromium and silicon in void nucleation were discussed. But the relative insensitivity of the swelling rate of alloys to temperature, displacement rate and composition is discussed.

TL;DR: In this paper, various areas of use for ceramic materials in a generalised, tokamak type fusion reactor are briefly considered, including components at the first wall, the blanket, shield and electrical insulators for magnets, neutral beam heaters and r.f. waveguides.

TL;DR: In this article, the effects of grain size, solution heat-treating temperature, specimen purity, and hydrogenation technique on the formation of gamma-phase and delta-phase hydrides in zirconium have been investigated.

TL;DR: In this article, chemical interactions between UO2 fuel and Zircaloy-4 cladding under isothermal and transient temperature conditions up to the melting point of Zry (Zry) are described.

TL;DR: In this article, the Impurity Study Experiment (ISX-B) neutral beam heated plasmas when a small amount of neon is injected shortly after the start of beam heating was investigated.

TL;DR: In this paper, the effects of light ion irradiation damage in fusion materials produce induced radioactivity in 22 elements: Sc, Ti, V, Cr, Fe, Co, Ni, Cu, Zn, Ge, Y, Zr, Nb, Mo, Rh, Ag, Sn, Ta, W, Pt, Au and Pb.

TL;DR: In this paper, effective detrapping cross sections for different energies and temperatures of deuterium implanted into carbon substrates at varying temperatures (25-1000°C) and ion energies (2-20 keV) were determined.

TL;DR: In this paper, isothermal measurements of hydrogen decomposition pressure (P) vs. hydrogen concentration (XH) were carried out on ten Li-Pb alloys in the composition range 0.1 ≤ XPb ≤ 0.8.

TL;DR: In this paper, a shear punch test was developed to extract strength and ductility information from thin sheet samples as small as transmission electron microscopy (TEM) disc specimens, based on driving a cylindrical punch through a clamped specimen, and instrumenting the punch to obtain a load-displacement curve of the punching process.