Annual Report 2009/2010 - JUWEL - Forschungszentrum Jülich

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Fig. 19: Typical secondary phases of UAl x -Al (left column) and U 3 Si 2 -Al (right column) fuel corroded in MgCl 2 -rich brine a & f) Lesukite; b & g) MgAl-LDH; c & h) UAl X and U 3 Si 2 -Al (white); d & i) Fe-phases; e & j) Al-oxide/hydroxide. 37
e & j) Aggregates of aluminium oxides/hydroxides consisting of Al and O. These phases only occur in water treated samples. c) A6 2008 H 2 O > 63 μm; h) A8 2008 H 2 O > 63 μm). For the iso-propanol treated samples the following minerals could be identified: MgAl-LDH, lesukite, Fe-phases, U associated with Al and in case of the U 3 Si 2 -Al fuel additional Si (uncorroded fuel) in coarser aggregates. An enrichment of iron-minerals could be observed in the 2-63 μm fraction. Lesukite is enriched in the < 2 μm fraction. For the water treated samples an enrichment of Al-oxides/hydroxides, particularly in the < 2 μm fraction, could be observed. Only traces of LDH could also be found. Lesukite is completely dissolved by the water. Furthermore, small amounts of Fe-phases and uncorroded fuel occur. An additional EDS-analysis of the < 2 μm fractions of the differently treated samples was performed. Several areas of different sites of the samples were measured, quantified, and mean values were calculated for the element contents. Salts like bischofite deriving from the brine were dissolved. The iso-propanol treated sample shows higher concentrations of Cl. Furthermore, Fe is enriched. The water treated samples show lower amounts of Mg and Cl and accordingly higher concentrations of Al and O. Due to the higher solubility of water, lesukite was dissolved completely. These results underline and confirm the observations made by SEM. Conclusions Due to the sample treatment various crystalline phases could be enriched successfully, which lead to a better identification of the secondary phases. From the results of the chemical investigation of the samples can be concluded, that Al and U are dissolved and reprecipitated. Hence, they are only present in the solid. The solid-phase characterisation by SEM/EDS after treatment and enrichment suggests that the following crystalline secondary phases are identified: MgAl-LDH, lesukite, Al-oxide/hydroxide, and Fe-phases. Furthermore, traces of uncorroded fuel UAl x -Al and U 3 Si 2 -Al could be found. The next step will be the quantification of the crystalline secondary phases by XRD and the Rietveld method. A high amount of amorphous phases (approximately 50 wt.-%) is contained in the samples, as well. It is assumed that U is also associated to these amorphous phases. To clarify the binding mechanisms of U, a characterisation and quantification of the amorphous phases will follow in further investigations. References [1] Brücher, H., Curtius, H., Fachinger, J., Kaiser, G., Mazeina, L., Nau, K.: Untersuchungen zur Radionuklidfreisetzung und zum Korrosionsverhalten von bestrahltem Kernbrennstoff aus Forschungsreaktoren unter Endlagerbedingungen, Report Forschungszentrum Jülich, Jül-4104, ISSN 0944-2952 (2002). [2] Mazeina, L., Curtius, H., Fachinger, J., Odoj, R.: Characterisation of secondary products of uraniumaluminium material test reactor fuel element corrosion in repository-relevant brine, J. Nucl. Mater. 323, 1 (2003). [3] B. Kienzler, A. Loida, (Hrsg.), Endlagerrelevante Eigenschaften von hochradioaktiven Abfallprodukten – Charakterisierung und Bewertung – Empfehlungen des Arbeitskreises HAW-Produkte; Wissenschaftliche Berichte FZKA 6651, Institut für Nukleare Entsorgungstechnik, Forschungszentrum Karlsruhe, (2001). [4] Hiltmann, W. & Stribrny, B.: Tonmineralogie und Bodenphysik. Handbuch zur Erkundung des Untergrundes von Deponien und Altlasten, Band 5. BGR, Bundesanstalt für Geowissenschaften und Rohstoffe. ISBN 3-540-59465-5 Springer-Verlag (1998). 38
Page 1 and 2: Mitglied Mitglied der der Helmholtz
Page 4 and 5: Forschungszentrum Jülich GmbH Inst
Page 6 and 7: TABLE OF CONTENTS 1 Preface .......
Page 8: 6.2.2 Doctoral Thesis .............
Page 11 and 12: state of NRW. The collaborative pro
Page 13 and 14: 2 Institute’s Profile Due to the
Page 15 and 16: 2.2. Organization chart Reactor Saf
Page 17 and 18: 3 Key Research Topics 3.1. Long Ter
Page 19 and 20: actinide co-conversion into polyact
Page 21 and 22: Fig. 7: Non-destructive analytical
Page 23 and 24: Fig. 9: Thermal treatment of an AVR
Page 25 and 26: 3.8. Product Quality Control of Rad
Page 27 and 28: 3.8.2 Product Quality Control of Lo
Page 29 and 30: The advantage of working at low vac
Page 31 and 32: NdPO 4 powder sample, directly rece
Page 33 and 34: 4.5. Non-destructive assay testing
Page 35 and 36: 5 Scientific and Technical Reports
Page 37 and 38: Results and Discussion The irradiat
Page 39 and 40: work will focus on the identificati
Page 41: Different solvents (iso-propanol an
Page 45 and 46: Experimental details The corrosion
Page 47 and 48: Intensity [CPS] 500 400 300 200 100
Page 49 and 50: Fig. 24: Left: High resolution TEM
Page 51 and 52: a) MD model [10] b) Derived Lesukit
Page 53 and 54: 5.4. Minor actinide(III) recovery f
Page 55 and 56: Extensive extraction studies were p
Page 57 and 58: of the extraction properties of the
Page 59 and 60: Cm(III) together with the lanthanid
Page 61 and 62: using a mixture of CyMe4BTBP and TO
Page 63 and 64: A more challenging route studied wi
Page 65 and 66: These preliminary results show that
Page 67 and 68: The 1-cycle SANEX process is intend
Page 69 and 70: Continuous counter-current tests us
Page 71 and 72: Conclusion In this work, it was sho
Page 73 and 74: shaken by a vortex mixer for 15 min
Page 75 and 76: 100 100 Distribution ratio 10 1 0.1
Page 77 and 78: Tab. 15: The distribution ratios of
Page 79 and 80: 5.7. Synthesis and thermal treatmen
Page 81 and 82: Acid-Deficient Uranyl-Nitrate via d
Page 83 and 84: Optical investigation showed a noti
Page 85 and 86: TG /% 100 98 96 94 92 90 88 86 84 8
Page 87 and 88: Radiolysis in the aqueous solutions
Page 89 and 90: is about 4% while the one of the rh
Page 91 and 92: Fig. 59: Compressibility curve for
Page 93 and 94:
Conclusion and outlook Monazite-typ
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Fig. 63: Description of the unit ce
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agents for the synthesis of neodymi
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100 TG 785°C Exo DSC 0,2 0,0 90 -0
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After synthesis the product was cen
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process of monazite and additional
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Tab. 18: Lattice parameters determi
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Conclusions For Sm 1-x Ce x PO 4 mo
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5.11. Raman Spectra of Synthetic Ra
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The numerical values of all measure
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knowledge, these special relationsh
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Fig. 80: Raman spectra of LaPO 4 ir
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5.12. MC simulation of thermal neut
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content was replaced by hydrogen. C
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constant for hydrogen concentration
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with a 0 1 -183.88 ± 8.55 and a 2
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5.13. An Improved Method for the no
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2 2 2 d0 R ds d0 dw la( )
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The relative uncertainty for the ac
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In the drum, 4 ‘hot spots’ for
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activity of Cs-137 is much more und
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gamma-ray detector approximated by
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shown in Fig. 96. In both cases the
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econstruction than the old calculat
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Neutron capture cross sections and
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Outlook The evaluated data will be
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from carbon-based HTR fuel elements
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Fig. 102: 3D volume reconstructions
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dislocate the 14 C atom from its pr
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It can be seen that nearly all trit
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Acknowledgement The authors like to
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development by investigations of ga
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Fig. 109: The left picture shows th
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[2] A European Roadmap for Developi
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from airborne SWIR Full Spectrum Im
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Fig. 113: Visualization of the vege
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number of training samples up to 19
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Acknowledgements The work presented
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three approaches has severe drawbac
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neighbours from the list of merge c
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it gives a difference in segmentati
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[6] I. Niemeyer, F. Bachmann, A. Jo
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Monitoring 3 cooperated intensively
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facilities and other treaty related
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parameters of the SAR system, such
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The MGD products used in the study
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Fig. 134 contains the result for th
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[2] H. Maître (ed.), Processing of
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Preparatory Committee to allocate t
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unconditional security assurances f
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safeguards was also requested. Deci
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[16] United Nations Security Counci
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5.24. Development and Application o
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Hardware layer The hardware layer i
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So in most applications the scale u
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The ENDF-B/V and ENDF-B/VI librarie
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5.26. Product control of waste prod
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Polysiloxane which has been investi
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acceptance requirements [3]. In the
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Fig. 145: List of description and d
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6.1. Courses taught at universities
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Umwelt / Energy & Environment 2010;
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6.5. Institute Seminar The IEK-6 or
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6.5.3 Invited talks 2009 30.04.2009
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21.09.2010 Dr. N. Evans: The Chemis
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8 Selected R&D projects 8.1. EU pro
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K. Aymanns: Nominated as deputy re
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Bukaemskiy A.A., Barrier D., Modolo
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11.2. Publications 2009 11.2.1 Jour
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Rezniczek, A.; Richter, B.; Jussofi
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Daniels, H.: Co-conversion of actin
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11.3. Publications 2010 11.3.1 Jour
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Sypula, M.; Wilden, A.; Schreinemac
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(Partitioning) - Stabilitätsunters
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Modolo, G.; Bosbach, D.; Geist, A.;
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12 How to reach us Postal Address F
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By train: Take the train from Aache
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Schriften des Forschungszentrums J
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