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Proc. Radiochim. Acta 1, 1–4 (2011) / DOI 10.1524/rcpr.2011.0004 © by Oldenbourg Wissenschaftsverlag, München Analysis of uranium ore concentrates for origin assessment By Z. Varga1,∗, M. Wallenius1, K. Mayer1 and M. Meppen2 1 European Commission Joint Research Centre, Institute for Transuranium Elements, P.O. Box 2340, 76125 Karlsruhe, Germany 2 Universität Hamburg, Department Chemie, Edmund-Siemers-Allee 1, 20146 Hamburg, Germany (Received December 18, 2009; accepted in revised form November 11, 2010) Nuclear forensics / Origin assessment / Uranium ore

Radiochim. Acta 99, 807–813 (2011) / DOI 10.1524/ract.2011.1886 © by Oldenbourg Wissenschaftsverlag, München Characterization and classification of uranium ore concentrates (yellow cakes) using infrared spectrometry By Z. Varga1,∗, B. Öztürk1, M. Meppen2, K. Mayer1, M. Wallenius1 and C. Apostolidis1 1 European Commission, Joint Research Centre, Institute for Transuranium Elements, P.O. Box 2340, 76125 Karlsruhe, Germany 2 Carl Friedrich von Weizsäcker-Zentrum für Naturwissenschaft und Friedensforschung, Beim Schlump 83, 20144 Hamburg, Germany (Received April 11

Radiochim. Acta 98, 771–778 (2010) / DOI 10.1524/ract.2010.1777 © by Oldenbourg Wissenschaftsverlag, München Origin assessment of uranium ore concentrates based on their rare-earth elemental impurity pattern By Z. Varga∗, M. Wallenius and K. Mayer European Commission Joint Research Centre, Institute for Transuranium Elements, P.O. Box 2340, 76125 Karlsruhe, Germany (Received March 8, 2010; accepted in revised form May 28, 2010) Nuclear forensics / Rare-earth elements / Origin assessment / Uranium ore concentrate / Inductively coupled plasma mass spectrometry

Radiochim. Acta 99, 335–339 (2011) / DOI 10.1524/ract.2011.1840 © by Oldenbourg Wissenschaftsverlag, München Investigation of the 236U/238U isotope abundance ratio in uranium ores and yellow cake samples By M. Srncik1,2,∗, K. Mayer2, E. Hrnecek2, M. Wallenius2, Z. Varga2, P. Steier3 and G. Wallner1 1 Department of Inorganic Chemistry, University of Vienna, Währinger Straße 42, 1090 Vienna, Austria 2 European Commission, Joint Research Centre, Institute for Transuranium Elements, P.O. Box 2340, 76125 Karlsruhe, Germany 3 VERA Laboratory, Faculty of Physics

, Wang et al. 2013 ; Fuchs et al. 2015 ; Riegler et al. 2015 ; Suzuki et al. 2015 ), suggesting that the mobility of U(IV) may be significantly enhanced by the presence of colloidal material under reducing conditions. Uranium ore deposits have been examined as natural analogs of nuclear waste repositories as their alteration halos provides valuable information on the mobilization and retardation of U and other radionuclides over millions of years ( Pearcy et al. 1994 ; Fayek et al. 2003 ; Schindler et al. 2010 ). Recent nano- to microscale studies of finely

Radiochim. Acta 101, 779–784 (2013) / DOI 10.1524/ract.2013.2110 © by Oldenbourg Wissenschaftsverlag, München Applicability of Raman spectroscopy as a tool in nuclear forensics for analysis of uranium ore concentrates By D. Ho Mer Lin1,2,∗, D. Manara1, Zs. Varga1, A. Berlizov3, Th. Fanghänel1,4 and K. Mayer1 1 European Commission, Joint Research Centre, Institute for Transuranium Elements, P.O.Box 23 40, 76125 Karlsruhe, Germany 2 DSO National Laboratories, 20 Science Park Drive Singapore 118230 3 International Atomic Energy Agency, Vienna International Centre, P

6 Uranium Ore Deposits— Products of the Radioactive Earth Jane A. Plant, Peter R. Simpson and Barry Smith British Geological Survey Kingsley Dunham Centre Keyworth, Nottingham, NG12 5GG, United Kingdom Brian F. Windley Department of Geology The University of Leicester University Road Leicester, LEI 7RH, United Kingdom INTRODUCTION Uranium ore deposits are of intrinsic economic importance as a source of fissionable 235U and 238U, as well as 226Ra and other radioactive species. They are also important as natural analogues of nuclear waste repositories

Radiochim. Acta 95, 25–32 (2007) / DOI 10.1524/ract.2007.95.1.25 © by Oldenbourg Wissenschaftsverlag, München Trace element immobilization by uranyl minerals in granite-hosted uranium ores: Evidences from the Xiazhuang ore field of Guangdong province, China By L. Lu1, F. Chen1,∗, R. C. Ewing2 and R. Wang3 1 Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, P.R. China 2 Geological Sciences, The University of Michigan, Ann Arbor, MI 48109-1005, USA 3 State Key Laboratory for Mineral Deposits Research, Nanjing University, Nanjing

Abstract

In this article, we consider a mathematical modelling problem in engineering of uranium ores heap leaching. Firstly, we deduce a mathematical model of uranium ores heap leaching by combining solute transportation equations with microbial chemical reactions. Secondly, an inverse problem, which is solved by the optimal perturbation method together with the Tikhonov regularization, is considered for identifying the parameters of the proposed mathematical model. Finally, numerical simulations are given for the forward problem and the inverse problem to show the pattern of uranium ores microbial heap leaching and verify the effectiveness of parameters identification, respectively.

Radiochimica Acta 57, 219 (1992) © R. Oldenbourg Verlag, München 1992 - 0033-8230/92 $ 3.00+0.00 Erratum: Separation and Purification of Plutonium in Uranium Ores for Mass Spectrometric Measurement By Moses Attrep, Jr., F. R. Roensch, R. Aguilar, and J. Fabryka-Martin Los Alamos National Laboratory, Mail Stop J514, Los Alamos, New Mexico 8754S, USA Radiochim. Acta 57 (1992) 15-20. On page 17, Step 6, line 5, please replace pretreated with HBr. by pretreated with 0.1 M H2SO4.