• Author's personal copy - Yixiang

    Author's personal copy 26 Y. Gan, M. Kamlah / Fusion Engineering and Design 85 (2010) 24 32 Fig. 3. (a) The unit cell of the HTC model and (b) temperature distribution. each contact zone and includes the regions of the wall, pebble, and interstitial gas. The pebble has …

  • The 14th International Workshop on Beryllium Technology ...

    8:30 AM 8:50 AM 0:20 Overview of the US Beryllium Industry Keith Smith Industrial V. Chakin 8:50 AM 9:10 AM 0:20 Status of the BP1 Pebble Production Keigo Nojiri Fabrication & C. Dorn 9:10 AM 9:30 AM 0:20 Studies for production of billets and articles from tantalum and titanium beryllides Yevgeniy Frants

  • Tritium and helium release from beryllium pebbles neutron ...

    1. Introduction. Beryllium is considered to be used as a neutron multiplier material in a form of pebbles with a diameter of 1 mm in the helium cooled pebble bed (HCPB) breeding blanket of ITER and DEMO , .In the fusion reactors, the beryllium pebbles will be irradiated by high fluxes of fusion neutrons resulting in the production of significant amounts of tritium and helium atoms.

  • Beryllium fabrication/cost assessment for ITER ...

    A fabrication and cost estimate of three possible beryllium shapes for the International Thermonuclear Experimental Reactor (ITER) blanket is presented. The fabrication method by hot pressing (HP), cold isostatic pressing plus sintering (CIP+S), cold isostatic pressing plus sintering plus hot ...

  • Thermo-mechanical Modelling of Pebble Beds in Fusion ...

    The framework of the present material model is composed of a non-linear elastic law, the Drucker-Prager-Cap theory, and a modified creep law. Furthermore, the volumetric inelastic strain dependent thermal conductivity of beryllium pebble beds is taken into account and …

  • (PDF) Fabrication and characterization of Be12V pebbles ...

    V pebble bed densi fi ed inside of the ... In the R&D area of beryllium technology for a solid breeding blanket, a major subject is applications of beryllides, for which lifetime evaluation as ...

  • Advanced Helium Cooled Pebble Bed Blanket with SiCf/SiC …

    Advanced Helium Cooled Pebble Bed Blanket with SiC f/SiC as structural material L.V. Boccaccini Forschungszentrum Karlsruhe, Germany International Town Meeting on SiC/SiC Design and Material Issues for Fusion Systems ... beryllium pebble bed, ISFNT-5, Rome. Max. allowable temperature

  • (PDF) Granulation of Be12V pebbles using the rotating ...

    The use of Be–V rods containing pure beryllium phase was considered a reasonable solution to this problem. ... This paper also focuses on beryllium pebble handling with respect to safety and ...

  • Federal Register :: Occupational Exposure to Beryllium

    Mists can also form during operations that use machining fluids. Beryllium fume can form while welding with or on beryllium components, and from hot processes such as those found in metal foundries. Occupational exposure to beryllium can also occur from skin, eye, and mucous membrane contact with beryllium particulate or solutions. V. Health ...

  • Identification of material parameters of a thermo ...

    Furthermore, the volumetric inelastic strain dependent thermal conductivity of beryllium pebble beds [J. Reimann, G. Piazza, Z. Xu, A. Goraieb, H. Harsch, Measurements of the thermal conductivity of compressed beryllium pebble beds, FZKA 7096 (2005)] is taken into account and full thermo-mechanical coupling is considered.

  • Risks of beryllium disease related to work processes at a ...

    Employees in the pebble plant (producing beryllium metal) who had been employed after 1983 also had increased risk, with a prevalence of beryllium disease of 6.4%, compared with 1.3% of other workers hired in the same period, and a prevalence of abnormal blood tests of 19.2%.

  • Ping PAL 4 BeCu Beryllium Copper Putter 36" for sale ...

    Find many great new & used options and get the best deals for Ping PAL 4 BeCu Beryllium Copper Putter 36" at the best online prices at eBay! Free shipping for many products!

  • Brush Wellman Beryllium Pebbles Plant - Coworking Space in ...

    14 visitors have checked in at Brush Wellman Beryllium Pebbles Plant.

  • Safety and Health Topics | Beryllium | Occupational Safety ...

    For helium cooled pebble bed blankets, the description of the thermal-mechanical interaction between pebble beds and structural material requires the knowledge of the pebble bed thermal conductivity k as a function of temperature T and deformation state (pebble bed strain ɛ).. Experimental results for the thermal conductivity of compressed beryllium pebble beds are presented.

  • Advanced Helium Cooled Pebble Bed Blanket

    The Advanced Helium Cooled Pebble Bed Blanket (see Fig.1) exhibits the same basic design features as the European DEMO HCPB blanket, which is based on the use of separate ceramic breeder and beryllium pebble beds placed between cooling plates. The separation between breeder and multiplier in form of a pebble bed is necessary to avoid

  • Beryllium - Wikipedia

    Beryllium sulfide, selenide and telluride are known, all having the zincblende structure. Beryllium nitride, Be 3 N 2 is a high-melting-point compound which is readily hydrolyzed. Beryllium azide, BeN 6 is known and beryllium phosphide, Be 3 P 2 has a similar structure to Be 3 N 2.

  • 'IEA International Workshop on Beryllium Technology for ...

    Toutilize berylliumin thepebbletype blanket,aseries of discussionswereintensified in multiple viewpoints such as the swelling,He/T releasefrom beryllium pebble irradiated up to high Hecontent, effective thermal conductivity, tritium permeation and coating, andfabrication cost,

  • Analysis of tritium kinetics of SIBELIUS beryllium

    to obtain the tritium release:retention characteris-tics in the beryllium pebble beds. However, to understand the basic mechanism of the tritium kinetics and material properties of beryllium, re-quired are the beryllium specimens with low BeO content and high fabrication density, such as …

  • Development Document for Effluent Limitations Guidelines ...

    ----- PRIMARY BERYLLIUM SUBCATEGORY SECT - V BERYLLIUM PEBBLE PLANT AREA VENT WET AIR POLLUTION CONTROL The beryllium pebble plant contains a ventilation system for air circulation A wet scrubber is employed to clean the used air prior to venting to the atmosphere. Although the scrubber liquor is recycled extensively, a blowdown stream is ...

  • Synthesis of Beryllium Pebbles Using Plasma Rotating ...

    Beryllium is used as neutron multiplier in the form of a pebble bed. Basic characteristics of the beryllium pebbles are required to the design of blanket. From this point view, production methods and basic characteristics including particle morphology and mechanical properties of beryllium …

  • PowerPoint-Präsentation - ITER

    The safest solution is not to produce dusts or fumes during the processing of Beryllium This can be done by choosing electrical wire- or water-jet cutting as manufacturing method The second best solution concerning safety is to encapsulate the process

  • Memomnd~m ‘ 0 t-4 : ;c. . UNITED STATES GOVERNMENT r4

    of produotion of beryllium pebble metal and beryllium oxide from ore and subsequent vacuum oaating of the metal. The beryllium faoilities at Luckey are primarily Government-owned (Brush's equity at Luokey plant is about twenty-five (25) per oent of total investment for beryllium facili-

  • TEM study of beryllium pebbles after neutron irradiation ...

    Abstract Beryllium is planned to be used as a neutron multiplier in the Helium Cooled Pebble Bed (HCPB) European concept of a breeding blanket of DEMO. In order to evaluate the irradiation performance, individual pebbles and constrained pebble beds were neutron irradiated at temperatures typical for fusion blanket.

  • A Guide to Designing and Fabricating with Beryllium

    A GUIDE TO DESIGNING AND FABRICATING WITH BERYLLIUM An introductory guide to the physical and mechanical properties, material selection and fabricating methods for beryllium. ... Primary beryllium is produced as “pebble” by the magne-sium reduction of anhydrous beryllium fluoride. The

  • Re-circulation Blanket Concept with Beryllium Pebble Beds ...

    the Beryllium pebble beds Advantages : 1. Combination of high flow rate in FW/multiplier region with low flow rate in the large central channel results in effective cooling of FW and beryllium pebble beds, and, at the same time, in maximised coolant exit temperatures. 2. Flow rate through the pebble bed about a factor of three larger than

  • (PDF) Inner structures of compressed pebble beds ...

    The knowledge of the contact surfaces is of special importance for beryllium pebble beds because the thermal conductivity is sensitively dependent on these surfaces. Results from compression and microtomography experiments are reported where, first, pebble beds consisting of 3.5 mm aluminium spheres, (simulating the beryllium pebbles) were ...

  • Characterization of constrained beryllium pebble beds ...

    Oct 01, 2013· Read "Characterization of constrained beryllium pebble beds after neutron irradiation at HFR at high temperatures up to helium production of 3000 appm, Fusion Engineering and Design" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • Beryllium - Element information, properties and uses ...

    Beryllium is a silvery-white, lustrous, relatively soft metal of group 2 of the periodic table. The metal is unaffected by air or water, even at red heat. When copper and nickel are alloyed with beryllium they not only become much better at conducting electricity and heat, but they display remarkable elasticity.

  • A Semi-Theoretical Approach to a Correlation for the ...

    In the framework of the European Fusion Technology Programme, Lithium ceramics and Beryllium packed pebble beds are foreseen to be used as Tritium breeders and neutron multipliers, respectively, for the Helium Cooled Pebble Bed breeding blanket of …

  • Measurement of tritium production rate in water cooled ...

    distance to the beryllium layer, and these sharply change in the 12mm thick breeder layers. Slow neutrons drastically increase by reactions between fast neutron and beryllium. Increased slow neutrons are incident to the breeder layers from the beryllium layers. Mean free path of the neutron is very

  • Joerg Reimann et al. Publications on Thermomechanics of ...

    Reimann, J.; Behnke, M.; Mechanical behaviour of monosized and binary beryllium pebble beds; Proc. of the 4th IEA Int.Workshop on Beryllium Technology for Fusion,Karlsruhe, September 15-17, 1999 FZKA-6462 (April 2000) S.143-54, Fusion Technology, 38(2000) S.299-309

  • Talk:Pebble-bed reactor - Wikipedia

    pebble leakage. This paragraph ... "A pebble-bed reactor thus can have all of its supporting machinery fail, and the reactor will not crack, melt, explode or spew hazardous wastes. It simply goes up to a designed "idle" temperature, and stays there.

  • Growth of Beryllium Oxide Nano -structures during Thermal ...

    V. D. Scott on beryllium oxidation mechanism few beryllium oxide nano-rods grown around disorders of beryllium lattice were observed [6]. Author suggested that ... 0.5 % of the total volume) void in the bulk of the pebble, which is formedduring the cooling phase of th e fabrication process. Few smaller voids with size up to 100nm have also