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Kim, S. H.; Paek, S. W.; Shim, J. B.; Kwon, S. W.; Kim, K. R.; Chung, H. S.; Ahn, D. H.; Yoon, D. S.
Proceedings of the KNS spring meeting2009
Proceedings of the KNS spring meeting2009
AbstractAbstract
[en] Electrowinning is a electrochemical process to simultaneously recover transuranium as well as uranium by using a liquid cadmium cathode (LCC). U ions are known to be deposited on the LCC in the form of dendrites having large surface area. These U dendrites were difficult to settle down into the liquid Cd even if the density of U was even larger than that of Cd. The floating U dendrites on the LCC have a role of solid cathode and so co-deposition of U and TRU could be hampered. So, LCC agitators have been developed to prevent U from forming dendrites, for example, blade stirrer and pounder in Japan and United States, respectively. According to the U-Cd phase diagram, U or UCd11 phases are, respectively, stable above and below 473 .deg. C when both U and Cd elements are coexisted. Up to now, electrodeposition experiments of actinides on the LCC have usually been carried out above 473 .deg. C, especially at around 500 .deg. C. If UCd11 phases do not have a dendrite form in the process of a electrodeposition, these phases may sink into the liquid Cd even when no-stirring of LCC. This will be a good method to enhance the recovery rates of actinide elements. In this study, we observed if the UCd11 phases could go down to Cd without a stirring of LCC
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Source
Korean Nuclear Society, Daejeon (Korea, Republic of); [1 CD-ROM]; May 2009; [2 p.]; 2009 spring meeting of the KNS; Jeju (Korea, Republic of); 18-23 May 2009; Available from KNS, Daejeon (KR); 5 refs, 3 figs
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Miscellaneous
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AbstractAbstract
[en] The manufacture of transuranium element sources is described. The isotopes employed and the techniques used to prepare the sources are reviewed
[fr]
Dans cet article sont presentees les fabrications de sources d'elements transuraniens. Sont ainsi passes en revue les isotopes mis en oeuvre ainsi que les techniques utilisees pour preparer les sourcesOriginal Title
Sources des transuraniens pour applications industrielles et medicales. III. Sources diverses d'isotopes de transuraniens (depots nus ou proteges, composes encapsules)
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Journal Article
Journal
Bull. Inf. Sci. Tech. (Paris); (no.218); p. 89-92
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AbstractAbstract
[en] The thought that some elements beyond uranium could still occur in nature has never quite faded, since breaking off the list of known elements in the case of uranium revealed no physical or chemical justification. It is true that the conclusion was drawn that the elements beyond uranium could only have short-lived isotopes, which would have to have died out since the formation of the earth without re-production. This argument, which allowed us to recognize the limit at uranium as accidental, and which, according to our current knowledge, remains correct, always left open the possibility of looking for trace occurrences of the elements beyond uranium. (author)
[de]
Der Gedanke, daß jenseits des Urans in der Natur vielleicht doch noch einige Elemente vorkommen könnten, ist nie ganz verblaßt, da das Abbrechen der Reihe der bekannten Elemente gerade beim Uran keine physikalische oder chemische Begründung erkennen ließ. Zwar zog man den Schluß, daß wohl die Elemente jenseits Uran nur kurzlebigere Isotope besitzen könnten, welche ohne Nachproduktion seit Entstehung der Erde ausgestorben sein müßten. Dies Argument, welches die Grenze beim Uran als zufällig erkennen ließ, und das wohl auch nach unseren heutigen Kenntnissen als zu recht bestehen bleibt, ließ die Möglichkeit immer offen, nach spurenweisem Vorkommen der Elemente jenseits Uran zu suchen.Original Title
Transurane
Primary Subject
Source
Fluegge, S.; Trenndelenburg, F.; Springer Verlag Berlin Heidelberg GmbH (Germany); 332 p; ISBN 978-3-662-23735-9;
; 1949; p. 1-2; ISSN 1615-0430;
; Available on-line: https://link.springer.com/chapter/10.1007/978-3-662-25834-7_1


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Book
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AbstractAbstract
[en] Plutonium 238, americium 241 and californium 252 possess very interesting nuclear characteristics and can be used for various applications. The Department of Plutonium Fuel Studies has developed a certain number of radioisotopic sources during the last few years. The most interesting are presented, with their field of application. Plutonium 238: X radiation sources for X-fluorescence analysis; prototype low-activity neutron source, of intermittent fluence; α sources for ionometric smoke detector. Americium 241: α sources for ionometric smoke detector. Californium 252: high activity neutron sources for industrial applications; low-activity neutron sources for medical use (neutrontherapy)
[fr]
Parmi les elements transuraniens le plutonium 238, l'americium 241 et le californium 252 presentent des caracteristiques nucleaires tres interessantes et sont utilisables pour des applications variees. Le Departement d'Etudes des Combustibles au Plutonium a developpe, depuis plusieurs annees, un certain nombre de sources radioisotopiques. Les plus interessantes sont presentees, avec leur domaine d'utilisation. Plutonium 238: sources de rayonnement X pour analyse par fluorescence X; prototype de source de neutrons, de faible activite, a fluence intermittente; sources de particules α pour detecteur ionometrique de fumee. Americium 241: sources de particules α pour detecteur ionometrique de fumee. Californium 252: sources de neutrons, de forte activite, pour applications industrielles; sources de neutrons, de faible activite, pour application medicale (curietherapie)Original Title
Sources de transuraniens pour applications industrielles et medicales. I. Sources scellees a base de plutonium 238, d'americium 241 et de californium 252
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Journal Article
Journal
Bull. Inf. Sci. Tech. (Paris); (no.218); p. 79-84
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AbstractAbstract
[en] This issue of TRAN-STAT is concerned with three related topics: results from the questionnaire included with the 3rd issue of TRAN-STAT, the role of the statistician in transuranic studies, and some effective ways for exploring data sets and communicating this information to others via effective data summaries
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Apr 1978; 12 p; Available from NTIS., PC A02/MF A01
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Report
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Seaborg, G.T.
Lawrence Berkeley Lab., CA (USA)1988
Lawrence Berkeley Lab., CA (USA)1988
AbstractAbstract
[en] This paper reviews some historical aspects of the knowledge and discovery of transuranium elements. This fission of plutonium is discussed also. 12 refs., 6 figs
Primary Subject
Source
Sep 1988; 22 p; 196. American Chemical Society national meeting; Los Angeles, CA (USA); 25-30 Sep 1988; CONF-880912--22; Available from NTIS, PC A03/MF A01 - OSTI; 1 as DE89004692; Portions of this document are illegible in microfiche products.
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Report
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AbstractAbstract
[en] In this paper, and forming part of a more global study carried out by the Applied Nuclear Physics Research Group of the University of Seville about the radioecological impact of anthropogenic radioactive contamination in particulate form, we show the results obtained in some lixiviation experiments performed with hot particles collected in areas where several nuclear tests were done especially in the midlle of the XXth century (Semipalatinsk, Nevada). These particles were submitted to a lixiviation process with 0.16M HCl (solution that simulate the acidity and behavior of the gastric juices in the accidental ingestion of these particles), determining the percentage of 238Pu, 239+240Pu and 241Am lixiviated after their separation and isolation from the eluates using anion exchange resins and after their measurement by high-resolution alpha-particle spectrometry. The obtained results indicate that the percentage lixiviated for the radionuclides under study is very low (in all the cases lower than 1%) and clearly lower to the observed one in similar experiments with soil samples containing anthropogenic plutonium and americium in the aerosol form.
[es]
En este artículo y dentro del estudio que está realizando el Grupo de Investigación de Física Nuclear Aplicada de la Universidad de Sevilla sobre el impacto radioecológico de la contaminación radiactiva antropogénica en forma particulada, se muestran los resultados obtenidos en experimentos de lixiviación realizados con partículas calientes colectadas en zonas del planeta donde se realizaron, fundamentalmente a mediados del siglo XX, pruebas nucleares (Semipalatinsk, Nevada). Estas partículas fueron sometidas a un proceso de lixiviación mediante 0,16M HCl (solución que simula la acidez y el comportamiento de los jugos gástricos en la posible ingestión inadvertida de estas partículas), determinando el porcentaje de 238Pu, 239+240Pu y 241Am lixiviado tras su separación y aislamiento desde los eluatos mediante el uso de resinas de intercambio iónico y su medida por espectrometría alfa de alta resolución. Los resultados obtenidos indican que el porcentaje lixiviado de los radionucleidos analizados es muy pequeño (en todo los casos inferior al 1 %) y claramente inferior al observado en experimentos similares con muestras con contenido antropogénico de plutonio y americio en forma de aerosol.Original Title
Experimentos de lixiviación de elementos transuránidos con partículas calientes
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Available from https://www.sepr.es/recursos/revista/RP90/files/extfile/DownloadURL.pdf
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Journal Article
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AbstractAbstract
No abstract available
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ANS annual meeting; San Diego, CA, USA; 18 Jun 1978; See CONF-780622--. Published in summary form only.
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Journal Article
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Conference
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Transactions of the American Nuclear Society; v. 28 p. 360
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AbstractAbstract
[en] Methods of obtaining various transuranium elements are given. Also described are methods of producing transuranium elements by reactions of heavy ions. The presence is discussed of certain transuranium elements in nature. (M.D.)
Original Title
4.7 Transurany
Source
Usacev, S.; Chrapan, J.; Chudy, M.; Vanovic, J; 544 p; Jul 1982; p. 353-368; Alfa; Bratislava (Czechoslovakia)
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Book
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AbstractAbstract
[en] A very brief account is given of the research programmes in the USSR leading to the production of plutonium and other transuranium elements. (U.K.)
Source
Spitsyn, V.I. (AN SSSR, Moscow); Katz, J.J. (Argonne National Lab., Ill. (USA)); p. 3-5; ISBN 0 08 020638 7;
; 1976; p. 3-5; Pergamon; Oxford; Symposium on chemistry of transuranium elements; Moscow, USSR; 4 - 8 Sep 1972

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