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261	Caractérisation des sources radioactives du cycle du combustible. Applications au cycle du thorium : synthèse de l'232U en combustibles solides Leniau, Baptiste 09 October 2013 (has links) (PDF) Si le cycle du thorium possède plusieurs avantages par rapport au cycle U/Pu, notamment une meilleure régénération de la matière fissile en spectre thermique et une production moindre d'actinides mineurs, il présente plusieurs limites. L'une d'elles est la présence, dans le combustible thorié irradié, d'232U. Cet isotope est le précurseur d'un rayonnement γ de 2.6 MeV. Cette thèse a, en partie, pour objectif d'étudier les différents paramètres influençant la synthèse de ce noyau dans divers types de combustibles et de réacteurs.L'autre partie de ce travail consiste à estimer l'impact de cet indésirable sur la radioprotection de l'aval du cycle. Dans ce but, un ensemble d'outils, permettant le calcul des spectres énergétiques des différents rayonnements émis par la matière radioactive, a été spécialement développé. Ces outils, dont la véracité a été éprouvée par l'intermédiaire de plusieurs benchmarks, fait partie intégrante de ce travail de thèse. Thorium 232U Combustible usé Spectres γ Château de transport
262	Dilatometrische Untersuchungen an den Schwere-Fermionen-Verbindungen (_UTh)Be 13 und CeNi 2 Ge 2 Kromer, Frank. January 2001 (has links) Dresden, Techn. Univ., Diss., 2000.
263	Fotoproducao de neutrons no sup232Th e sup238U com radiacao gama de captura de neutrons termicos no intervalo de energia entre 5,61 a 10,83 MeV GONCALEZ, ODAIR L. 09 October 2014 (has links) Made available in DSpace on 2014-10-09T12:43:06Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:05:36Z (GMT). No. of bitstreams: 1 06125.pdf: 6631284 bytes, checksum: 0d7cb7ea79949cb8c3121b13b630793a (MD5) / Tese (Doutoramento) / IPEN/T / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP thorium 232 uranium 238 cross sections neutrons photoproduction thermal neutrons capture neutron reactions gamma radiation IEAR-1 reactor
264	Caracterizacao radioquimica do sup(226)Ra, sup(40)K e dos isotopos de uranio e torio no fosfogesso PAES, VANESSA P. 09 October 2014 (has links) Made available in DSpace on 2014-10-09T12:45:31Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:08:38Z (GMT). No. of bitstreams: 1 07176.pdf: 4406803 bytes, checksum: fbfc4de3a51d8f9a62563c8233d28b8d (MD5) / Dissertacao (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP gypsum phosphate rocks radioactivity radium 226 potassium 40 uranium isotopes thorium isotopes separation processes alpha spectroscopy gamma spectroscopy
265	Preparacao e condutividade eletrica de eletrolitos solidos de toria-itria COSENTINO, IVANA C. 09 October 2014 (has links) Made available in DSpace on 2014-10-09T12:41:05Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:09:15Z (GMT). No. of bitstreams: 1 04687.pdf: 7600406 bytes, checksum: 7fc9c77439b889fea7b339da3aea0adb (MD5) / Tese (Doutoramento) / IPEN/T / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP thorium oxides solid electrolytes impedance sintering x-ray diffraction ceramics powder metallurgy physical properties materials working microstructure powders
266	Estudo de diferentes rotas de preparacao de oxidos binarios de torio e uranio AYOUB, JAMIL M.S. 09 October 2014 (has links) Made available in DSpace on 2014-10-09T12:43:43Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:09:59Z (GMT). No. of bitstreams: 1 06645.pdf: 3401354 bytes, checksum: ff644fe657265b4b455934601c560694 (MD5) / Dissertacao (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP mixed oxide fuels uranium dioxide thorium oxides coprecipitatyon homogeneous mixtures sol-gel process ultrasonic waves microwave heating drying fuel cycle
267	Disponibilidade de sup(238)U e sup(232)Th na utilização de fosfogesso na agricultura / Availability of sup(238)U and sup(232)Th in the utilization of phosphogypsum in agriculture MALHEIRO, LUCIANO H. 10 November 2014 (has links) Submitted by Claudinei Pracidelli (cpracide@ipen.br) on 2014-11-10T10:38:01Z No. of bitstreams: 0 / Made available in DSpace on 2014-11-10T10:38:01Z (GMT). No. of bitstreams: 0 / Dissertação (Mestrado em Tecnologia Nuclear) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP PHOSPHATE ROCKS GYPSUM NATURAL RADIOACTIVITY URANIUM 238 THORIUM 232 AGRICULTURE FERTILIZERS SAMPLE PREPARATION NEUTRON ACTIVATION ANALYSIS GAMMA SPECTROSCOPY
268	Fotoproducao de neutrons no sup232Th e sup238U com radiacao gama de captura de neutrons termicos no intervalo de energia entre 5,61 a 10,83 MeV GONCALEZ, ODAIR L. 09 October 2014 (has links) Made available in DSpace on 2014-10-09T12:43:06Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:05:36Z (GMT). No. of bitstreams: 1 06125.pdf: 6631284 bytes, checksum: 0d7cb7ea79949cb8c3121b13b630793a (MD5) / Tese (Doutoramento) / IPEN/T / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP thorium 232 uranium 238 cross sections neutrons photoproduction thermal neutrons capture neutron reactions gamma radiation iear-1 reactor
269	Caracterizacao radioquimica do sup(226)Ra, sup(40)K e dos isotopos de uranio e torio no fosfogesso PAES, VANESSA P. 09 October 2014 (has links) Made available in DSpace on 2014-10-09T12:45:31Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:08:38Z (GMT). No. of bitstreams: 1 07176.pdf: 4406803 bytes, checksum: fbfc4de3a51d8f9a62563c8233d28b8d (MD5) / Dissertacao (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP gypsum phosphate rocks radioactivity radium 226 potassium 40 uranium isotopes thorium isotopes separation processes alpha spectroscopy gamma spectroscopy
270	Preparacao e condutividade eletrica de eletrolitos solidos de toria-itria COSENTINO, IVANA C. 09 October 2014 (has links) Made available in DSpace on 2014-10-09T12:41:05Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:09:15Z (GMT). No. of bitstreams: 1 04687.pdf: 7600406 bytes, checksum: 7fc9c77439b889fea7b339da3aea0adb (MD5) / Tese (Doutoramento) / IPEN/T / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP thorium oxides solid electrolytes impedance sintering x-ray diffraction ceramics powder metallurgy physical properties materials working microstructure powders

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