Annual Report 2009/2010 - JUWEL - Forschungszentrum Jülich

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delayed gamma rays and their respective intensities will be used to extract partial neutron capture cross sections. Fig. 98: PGAA setup with beam line, sample chamber and BGO shielded HPGe detector at the guide hall of the Budapest reactor. The BGO detector is surrounded by 6 Li-plastic to shield the detector array from scattered neutrons. Fig. 99: Decay spectrum of a 237 NpO 2 sample with gold (11.11 mg Np, 1.965 mg Au), after 12.5 h irradiation. Counting time was 43 h. Lower part is the full spectrum; the upper part represents a zoomed region around the 198 Au gamma ray at 411 keV. 137
Outlook The evaluated data will be used as input data for numerical simulation of prompt gamma ray spectra using MCNP-X or GEANT 4 and to develop and optimize a non-destructive analytical technique for assay of minor actinides in heterogeneous waste packages. Further experiments are planned using fast neutrons from a 14 MeV neutron generator to extract also high energy data [3]. First attempts to generate synthetic spectra using the geometric arrangement in Budapest (see Fig. 100) have shown good agreement with experimental data; however, simulating a neutron emission of 10 8 n cm -2 s -1 and a detector of 0.1% efficiency requires very large computer capacity to obtain spectra of sufficient statistical significance. Fig. 100: Simulation of photon trajectories for the Budapest PGAA detector arrangement with GEANT 4. Acknowledgement: We gratefully acknowledge the support of the colleagues from BNC Budapest, Dr. Z. Revay, Dr. T. Belgya and Dr. L. Szentmiklosi. References [1] B.H. Armitage, P.M.J. Chard, S. Croft, T.W. Packer, D.B.C. Syme: Limitations to the accurate assessment of waste actinide content by neutron interrogation. Nuclear Science Symposium and Medical Imaging Conference, 1992., Conference Record of the 1992 IEEE , Orlando, FL, USA, IEEE pp. 703-705 [2] Z. Revay: Determining Elemental Composition Using Prompt Activation Analysis. Anal. Chem., <strong>2009</strong>, 81 (16), pp 6851–6859 [3] L. W. Campbell, L. E. Smith, and A. C. Misner: High-Energy Delayed Gamma Spectroscopy for Spent Nuclear Fuel Assay. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, VOL. 58, NO. 1, FEBRUARY 2011, 231-240 138
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Mitglied Mitglied der der Helmholtz
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Forschungszentrum Jülich GmbH Inst
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TABLE OF CONTENTS 1 Preface .......
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6.2.2 Doctoral Thesis .............
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state of NRW. The collaborative pro
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2 Institute’s Profile Due to the
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2.2. Organization chart Reactor Saf
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3 Key Research Topics 3.1. Long Ter
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actinide co-conversion into polyact
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Fig. 7: Non-destructive analytical
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Fig. 9: Thermal treatment of an AVR
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3.8. Product Quality Control of Rad
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3.8.2 Product Quality Control of Lo
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The advantage of working at low vac
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NdPO 4 powder sample, directly rece
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4.5. Non-destructive assay testing
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5 Scientific and Technical Reports
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Results and Discussion The irradiat
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work will focus on the identificati
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Different solvents (iso-propanol an
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e & j) Aggregates of aluminium oxid
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Experimental details The corrosion
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Intensity [CPS] 500 400 300 200 100
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Fig. 24: Left: High resolution TEM
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a) MD model [10] b) Derived Lesukit
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5.4. Minor actinide(III) recovery f
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Extensive extraction studies were p
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of the extraction properties of the
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Cm(III) together with the lanthanid
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using a mixture of CyMe4BTBP and TO
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A more challenging route studied wi
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These preliminary results show that
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The 1-cycle SANEX process is intend
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Continuous counter-current tests us
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Conclusion In this work, it was sho
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shaken by a vortex mixer for 15 min
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100 100 Distribution ratio 10 1 0.1
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Tab. 15: The distribution ratios of
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5.7. Synthesis and thermal treatmen
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Acid-Deficient Uranyl-Nitrate via d
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Optical investigation showed a noti
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TG /% 100 98 96 94 92 90 88 86 84 8
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Radiolysis in the aqueous solutions
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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
Page 95 and 96: Fig. 63: Description of the unit ce
Page 97 and 98: agents for the synthesis of neodymi
Page 99 and 100: 100 TG 785°C Exo DSC 0,2 0,0 90 -0
Page 101 and 102: After synthesis the product was cen
Page 103 and 104: process of monazite and additional
Page 105 and 106: Tab. 18: Lattice parameters determi
Page 107 and 108: Conclusions For Sm 1-x Ce x PO 4 mo
Page 109 and 110: 5.11. Raman Spectra of Synthetic Ra
Page 111 and 112: The numerical values of all measure
Page 113 and 114: knowledge, these special relationsh
Page 115 and 116: Fig. 80: Raman spectra of LaPO 4 ir
Page 117 and 118: 5.12. MC simulation of thermal neut
Page 119 and 120: content was replaced by hydrogen. C
Page 121 and 122: constant for hydrogen concentration
Page 123 and 124: with a 0 1 -183.88 ± 8.55 and a 2
Page 125 and 126: 5.13. An Improved Method for the no
Page 127 and 128: 2 2 2 d0 R ds d0 dw la( )
Page 129 and 130: The relative uncertainty for the ac
Page 131 and 132: In the drum, 4 ‘hot spots’ for
Page 133 and 134: activity of Cs-137 is much more und
Page 135 and 136: gamma-ray detector approximated by
Page 137 and 138: shown in Fig. 96. In both cases the
Page 139 and 140: econstruction than the old calculat
Page 141: Neutron capture cross sections and
Page 145 and 146: from carbon-based HTR fuel elements
Page 147 and 148: Fig. 102: 3D volume reconstructions
Page 149 and 150: dislocate the 14 C atom from its pr
Page 151 and 152: It can be seen that nearly all trit
Page 153 and 154: Acknowledgement The authors like to
Page 155 and 156: development by investigations of ga
Page 157 and 158: Fig. 109: The left picture shows th
Page 159 and 160: [2] A European Roadmap for Developi
Page 161 and 162: from airborne SWIR Full Spectrum Im
Page 163 and 164: Fig. 113: Visualization of the vege
Page 165 and 166: number of training samples up to 19
Page 167 and 168: Acknowledgements The work presented
Page 169 and 170: three approaches has severe drawbac
Page 171 and 172: neighbours from the list of merge c
Page 173 and 174: it gives a difference in segmentati
Page 175 and 176: [6] I. Niemeyer, F. Bachmann, A. Jo
Page 177 and 178: Monitoring 3 cooperated intensively
Page 179 and 180: facilities and other treaty related
Page 181 and 182: parameters of the SAR system, such
Page 183 and 184: The MGD products used in the study
Page 185 and 186: Fig. 134 contains the result for th
Page 187 and 188: [2] H. Maître (ed.), Processing of
Page 189 and 190: Preparatory Committee to allocate t
Page 191 and 192: 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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