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Neef, H.J.
Kernforschungsanlage Juelich G.m.b.H. (Germany, F.R.)1977
Kernforschungsanlage Juelich G.m.b.H. (Germany, F.R.)1977
AbstractAbstract
[en] If a graphite reflector of a pebble bed reactor is equipped with insertable absorber rods power control is achieved by less insertion depth of these rods than would be required for conventional designs for the same type of reactor. Therefore the difficulties growing with insertion depth and the danger of damaging fuel elements are reduced. With less stroke, the drives of the control rods are simplified, too. A means for this is doping the graphitic reflector bottom and the lower part of the reflector with neutron-absorbing material. A partial flow of neutrons forced downwards on insertion of the control rods into the upper zone of the reflector will be absorbed in this lower region. A formula is given for this doping. (HP)
[de]
Die Ausruestung des Graphitreflektors eines Kugelhaufenreaktors erfordert bei der Leistungssteuerung mittels einzufahrender Absorberstaebe geringere Eintauchtiefen dieser Staebe als herkoemmliche Konstruktionen fuer den gleichen Reaktortyp. Damit werden die, mit der Eintauchtiefe wachsenden Schwierigkeiten und die Gefahr der Beschaedigung von Brennelementen verringert. Auch die Antriebe werden bei geringerem Hub der Steuerstaebe vereinfacht. Mittel hierzu ist die Dotierung des graphitischen Reflektorbodens und des unteren Teils des Reflektors mit neutronenabsorbierenden Stoffen. Ein Teilfluss von Neutronen, der beim Einfahren der Steuerstaebe im oberen Reflektorbereich nach unten abgedraengt wird, dann in diesem unteren Bereich absorbiert. Fuer diese Dotierung ist ein Formelwert genannt. (HP)Original Title
Kernreaktor
Primary Subject
Source
17 Mar 1977; 3 p; DE PATENT DOCUMENT 2365531/C/; Also available from Dt. Patentamt, Muenchen (FRG); 1 fig.
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Patent
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AbstractAbstract
No abstract available
Primary Subject
Source
Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Atomic Energy (New York); ISSN 1063-4258;
; v. 123(4); p. 290-291

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Bertinshaw, J.; Bruck, S.; Maran, R.; Valanoor, N.; Danikin, S.; Klose, C.; Ulrich, C.
10th AINSE-ANBUG Neutron Scattering Symposium (AANSS) 20122012
10th AINSE-ANBUG Neutron Scattering Symposium (AANSS) 20122012
AbstractAbstract
[en] In a multiferroic material, ferromagnetism (FM) and ferroelectricity (FE) coexist, presenting exciting opportunities for research into new phenomena and technological innovation. Bismuth Ferrite (BiFe03) is among the rare cases where both properties exist at room temperature [1]. As such, its use in functional thin film heterostructures, like multiferroic tunnel junctions or exchange bias systems, which combine multiferroic (MF) and ferromagnetic layers, such as La0.67Sr0.33MnO3 (LSMO), is of particular interest. Most important in these thin film systems are the interactions across the interface between layers. Using polarised neutron reflectivity (PNR) and resonant X-ray reflectometry (XRMR), we have studied LSMO/BiFe03 bilayers, focusing on intriguing interfacial physics. PNR was performed at the Bragg Institute, ANSTO, Sydney, Australia; NRC-CNBC, Chalk River, Canada; and FRM-II, Munich, Germany. XRMR measurements were performed at BESSY II, Helmholtz Center Berlin, Germany. A simultaneous analysis of the PNR and XRMR datasets yielded detailed insight into the stoichiometry and magnetic depth profile of the bilayer system. Our results indicate a depleted FM magnetic region, which corresponds with a modified stoichiometry, extending ~2 nm into the LSMO at the bilayer interface region. This is significantly larger than the atomic scale interface roughness and contradicts models of spin or orbital reconstruction at the interface layer.
Source
Australian Institute of Nuclear Science and Engineering Inc, Australian Neutron Beam Users Group (Australia); 97 p; Nov 2012; p. 60; AINSE-ANBUG 2012: 10. Neutron Scattering Symposium (AANSS); Sydney, NSW (Australia); 7-9 Nov 2012; Available from http://www.ainse.edu.au/events2/conferences
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Miscellaneous
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Conference
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AbstractAbstract
No abstract available
Primary Subject
Source
ANS annual meeting; San Diego, CA, USA; 18 Jun 1978; See CONF-780622--. Published in summary form only.
Record Type
Journal Article
Literature Type
Conference
Journal
Transactions of the American Nuclear Society; v. 28 p. 294-295
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Hughes, A.V.; Holt, S. A; Lakey, J. H.
10th AINSE-ANBUG Neutron Scattering Symposium (AANSS) 20122012
10th AINSE-ANBUG Neutron Scattering Symposium (AANSS) 20122012
AbstractAbstract
[en] A new method for fabricating Floating Supported Bilayers (below left) is reported, which uses a self assembled monolayer of thiolipid on a gold surface as a support for the membrane. The thiolipid layer was characterised by SPR and Neutron Reflection, and almost complete coverage of the surface by the lipid was seen. This high coverage resulted in similarly high coverage of the subsequent bilayer, with the reflectivity measurements suggesting an essentially defect-free floating membrane of DPPC in the gel phase. See below right for the fitted density profile from Neutron Reflectivity measurements. This demonstrates that the surface coverage is › 99% in both the tethered and floating layers.
Source
Australian Institute of Nuclear Science and Engineering Inc, Australian Neutron Beam Users Group (Australia); 97 p; Nov 2012; p. 40; AINSE-ANBUG 2012: 10. Neutron Scattering Symposium (AANSS); Sydney, NSW (Australia); 7-9 Nov 2012; Available from http://www.ainse.edu.au/events2/conferences
Record Type
Miscellaneous
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Conference
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Martin, Roger.
CEA, 75 - Paris (France)1977
CEA, 75 - Paris (France)1977
AbstractAbstract
[en] The description is given of a renewable lower reflector structure for a high temperature pebble bed reactor of the type comprising a cylindrical or prismatic graphite vessel wrapped in concrete and terminating at its lower end with a conical or pyramidal bottom fitted with a central aperture allowing the pebbles to be discharged by gravity. This structure includes a bed of several layers of protective graphite pebbles on the bottom and, fitted vertically so as to be removable along the centre line of the central aperture through the reflector and the concrete, a graphite block drilled in its centre to allow the discharge of the fuel pebbles and the protective pebbles. The graphite block rises above the level of the central aperture by an extent corresponding to the thickness of the bed when the reactor is working
[fr]
On decrit une structure de reflecteur inferieur renouvelable pour reacteur a haute temperature a boulets, du type de ceux qui comprennent une cuve de graphite cylindrique (ou prismatique) entouree de beton et terminee a sa partie inferieure par un fond conique (ou pyramidal) equipe d'un orifice central permettant le dechargement des boulets de combustible par gravite. Cette structure comporte un matelas de quelques couches de boulets de graphite protecteur sur le fond et, monte amovible verticalement dans l'axe de l'orifice central a travers le reflecteur et le beton, un bloc de graphite fore selon son axe pour permettre le dechargement des boulets combustibles et des boulets protecteurs, le bloc de graphite depassant le niveau de l'orifice central d'une hauteur correspondant a l'epaisseur du matelas pendant les periodes de fonctionnement du reacteurOriginal Title
Structure de reflecteur inferieur renouvelable, pour reacteur nucleaire haute temperature a boulets
Primary Subject
Source
6 Sep 1977; 7 p; FR PATENT DOCUMENT 2402282/A/; Available from Institut National de la Propriete Industrielle, Paris (France)
Record Type
Patent
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AbstractAbstract
No abstract available
Primary Subject
Source
ANS annual meeting; San Diego, CA, USA; 18 Jun 1978; See CONF-780622--. Published in summary form only.
Record Type
Journal Article
Literature Type
Conference
Journal
Transactions of the American Nuclear Society; v. 28 p. 774-776
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Schulze, J.F.
Sandia National Labs., Albuquerque, NM (USA)1984
Sandia National Labs., Albuquerque, NM (USA)1984
AbstractAbstract
[en] A drive system that utilizes a linear induction motor has been devised which replaces the current pneumatic/hydraulic system. It is a less-complex system permitting easier servicing
Primary Subject
Source
Jan 1984; 19 p; Available from NTIS, PC A02/MF A01 as DE84007188
Record Type
Report
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AbstractAbstract
[en] The aim of our study carried out during the last 5-6 years was to find the hidden organic materials (for example explosives or drugs) in bulk objects with the neutron reflection and activation methods. The applicability of the concept of the differential σ_β and integral Σ_β reflection cross sections is also demonstrated. Further investigations are also recommended to improve the neutron reflection method. (author)
Primary Subject
Source
25 refs.
Record Type
Journal Article
Journal
Journal of Radioanalytical and Nuclear Chemistry; ISSN 0236-5731;
; CODEN JRNCDM; v. 308(1); p. 297-302

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Fritz, R.; Hornischer, E.; Rautenberg, J.; Schoening, J.
Hochtemperatur-Reaktorbau G.m.b.H., Dortmund (Germany, F.R.)1986
Hochtemperatur-Reaktorbau G.m.b.H., Dortmund (Germany, F.R.)1986
AbstractAbstract
[en] The side reflector is placed and supported above the hot gas plenum over some rows of supporting columns on the bottom layers of the reactor core extended outwards, where the hot gas plenum is extended by the free space between these supporting columns. The hot gas plenum is bounded radially by the thermal side shield or liner provided with thermal insulation in this area. The hot gas ducts are connected to the thermal side shield or the liner. An annular space seal is situated immediately above the hot gas duct connections in the annular space between the outer wall of the side reflector and the thermal side shield or liner. (orig./HP)
[de]
Der Seitenreflektor endet und stuetzt oberhalb des Heissgassammelraums sich ueber einige Reihen von Tragsaeulen auf den nach aussen verlaengerten Bodenlagen des Reaktorkerns ab, wobei der Heissgassammelraum um den freien Raum zwischen diesen Tragsaeulen erweitert ist. Der Heissgassammelraum ist radial durch den in diesem Bereich mit einer Waermeisolierung versehenen thermischen Seitenschild bzw. den Liner begrenzt. Die Heissgaskanaele sind an dem thermischen Seitenschild bzw. an dem Liner angeschlossen. In dem Ringraum zwischen der Aussenwand des Seitenreflektors und dem thermischen Seitenschild bzw. dem Liner ist unmittelbar oberhalb der Heissgaskanal-Anschlussstellen eine Ringraumdichtung horizontal angeordnet. (orig./HP)Original Title
Gasgekuehlter Kernreaktor mit einem aus kugelfoermigen Brennelementen aufgeschuetteten Reaktorkern
Primary Subject
Source
23 Jan 1986; 19 Dec 1980; 6 p; DE PATENT DOCUMENT 3047910/C/; ?: 19 Dec 1980
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Patent
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