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PR 113 Modelling of Spallation Source for the Myrrha Reactor Using the MCNPX and Geant4 Codes for Sensitivity Analysis of Reactivity Mauricio Q. Antolin, Aquilino S. Martinez, COPPE/UFRJ. Daniel A. P. Palma, CNEN. Franciole C. Marinho, IF/UFRJ. In an accelerator driven nuclear reactor (ADS) neutrons are produced from spallation reactions providing an external source to the core and sustaining its operation. Although there are different approaches to describe the kinetic behaviour of these reactors, the complete picture of its functioning still need to be addressed as there is no commercial ADS reactor in operation. In order to provide a better understanding on this matter one can take advantage of Monte Carlo techniques which allow to simulate the whole system in three dimensions considering time dependence and with realistic details of the complicated geometries involved. In this work a simulation of the time evolution for the MYRRHA conceptual reactor was developed. The SERPENT code was used allowing to simulate the nuclear fuel depletion. The spallation source which drives the system was simulated using both MCNPX and GEANT4 codes. These two packages can run assuming a number of models to describe hadronic interactions. The obtained results for the neutron energy spectrum from the spallation are coherent with each other and were used as input for the SERPENT code which simulated the constant power operation regime and also a linear variation of power. The obtained results show that the criticality of the system is sensitive to the model employed, but keeping relative small deviations with respect to the results obtained from the inverse kinetic model which comes from the point kinetic equations proposed by Gandini. Corresponding author: Daniel A. P. Palma PR 114 Nuclear Level Density within Extended Superfluid Model with Collective State Enhancement V.A. Plujko, O.M. Gorbachenko, B.M. Bondar, E.P. Rovenskykh, M.M. Zolko, Nuclear Physics Department, Taras Shevchenko <strong>National</strong> University, Kyiv, Ukraine. For nuclear level densities, a new variant of extended superfluid model [1,2] with collective state enhancement factor [3,4] is proposed and tested. An effect of collective states on the temperature of the intrinsic states is taken into account [3,4]. The ready-to-use table of the asymptotic values of level density parameter a and addition shift to excitation energy are prepared by the chi-square fit of the theoretical values of neutron resonance spacing and cumulative number of low-energy levels to experimental values. The systematic expressions for these parameters as a function of neutron excess are obtained too. The collective state effect on gamma-ray spectra and cross sections of neutron-induced nuclear reactions is investigated by the use of EMPIRE code[5] with modified level density parameters. The best expressions for collective state enhancement factor of nuclear level density are recommended. [1] R.Capote, M.Herman, P.Oblozinsky et al., Nucl.Data Sheets 110, 3107 (2009), http://www-nds.iaea.org/RIPL-3/ [2] M.I.Svirin, Fiz.El.Chas.At.Yad (Particles and Nucleus), Dubna 37, 901 (2006) [3] V.A.Plujko, O.M.Gorbachenko, Phys. Atom. Nucl. 70, 1643 (2007) [4] V.A.Plujko, O.M.Gorbachenko, I.M.Kadenko, Int.J.of Mod.Phys.E 16, 570 (2007) [5] M.Herman, R.Capote, B.V.Carlson et al., Nucl.Data Sheets 108, 2655 (2007) PR 115 320
Rotational-vibrational Description of Nucleon Scattering on Actinide Nuclei Using a Dispersive Coupled-Channel Optical Model J.M. Quesada, Departamento de Física Atomica, Molecular y Nuclear, Universidad de Sevilla, Apartado 1065, 41080, Sevilla, Spain. E. Sh. Soukhovitskii, Joint Institute for Energy and Nuclear Research, 220109, Minsk-Sosny, Belarus. R. Capote, International Atomic Energy Agency, NAPC-Nuclear Data Section, Vienna International Centre, A-1400, Vienna, Austria. S. Chiba, Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai, Naka, Ibaraki 319-1195, Japan. Tamura coupling model (reference [1]) has been extended to consider low-lying bands of vibrational and nonaxial nature observed in even-even actinides. Low-lying bands of vibrational nature present in odd actinides are also described in the present work. These additional excitations are introduced as a perturbation to the underlying rigid rotor structure that is known to describe well the ground state rotational band of major actinides. A coupled-channel optical model potential (OMP) containing a dispersive term is used to fit simultaneously all the available optical experimental databases (including neutron strength functions) for nucleon scattering on 238 U and 232 Th nuclei. Quasi-elastic (p,n) scattering data to the isobaric analogue states of the target nucleus are also used to constrain the isovector part of the optical potential. Derived Lane-consistent OMP is based on 15+ low-lying coupled levels that include the ground state, octupole, beta and gamma rotational bands. OMP parameters show a smooth energy dependence and energy independent geometry. Fitted deformations are in reasonable agreement with FRDM deformations theoretically derived by Moller and Nix (reference [2]). Preliminary results of the extension ofthe derived potential to odd fissile actinides (e.g. 239 Pu and 235 U) are being discussed. This work was partially supported by the Spanish Ministry of Economy and Competitivity under Contract FPA2011-28770-C03-02 and the International Science and Technology Center under contract B-1804. [1] T.Tamura, Review Modern Physics 17 (1965) 679 [2] P. Moller, J.R. Nix, W.D Myers, and W.J Swiatecki At. Data Nucl. Data Tables 59 (1995) 185. PR 116 Light Charged Particles Emission in Proton-Nucleus Collisions at Tp=1.9 GeV Sushil K. Sharma, Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30059 Krakow, Poland, Juelich Center for Hadron Physics, Forschungszentrum Juelich, 52425 Juelich, Germany, Institut fuer Kernphysik, Forschungszentrum Juelich, 52425 Juelich, Germany. M. Fidelus, Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30059 Krakow, Poland. D. Filges, Juelich Center for Hadron Physics, Forschungszentrum Juelich, 52425 Juelich, Germany, Institut fuer Kernphysik, Forschungszentrum Juelich, 52425 Juelich, Germany. F. Goldenbaum, Juelich Center for Hadron Physics, Forschungszentrum Juelich, 52425 Juelich, Germany, Institut fuer Kernphysik, Forschungszentrum Juelich, 52425 Juelich, Germany. L. Jarczyk, Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30059 Krakow, Poland. B. Kamys, Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30059 Krakow, Poland. M. Kistryn, H. Niewodniczanski Institute of Nuclear Physics PAN, Radzikowskiego 152, 31342 Krakow, Poland. St. Kistryn, Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30059 Krakow, Poland. St. Kliczewski, H. Niewodniczanski Institute of Nuclear Physics PAN, Radzikowskiego 152, 31342 Krakow, Poland. E. Kozik, H. Niewodniczanski Institute of Nuclear Physics PAN, Radzikowskiego 152, 31342 Krakow, Poland. P. Kulessa, H. Niewodniczanski Institute of Nuclear Physics PAN, Radzikowskiego 152, 31342 Krakow, Poland. H. Machner, Universitaet Duisburg-Essen, Fakultaet fuer Physik, Lotharstr.1, 47048 Duisburg, Germany. A. Magiera, Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30059 Krakow, Poland. B. Piskor-Ignatowicz, Smoluchowski Institute of Physics, 321
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ND2013 2013 International Nuclear D
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Session BF Evaluated Nuclear Data L
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Session DD Nuclear Structure and De
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Hale, G. n+ 12 C Cross Sections fro
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Domula, A. New Nuclear Structure an
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Session KC Evaluated Nuclear Data L
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MacCormick, M. Survey and Evaluatio
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ments. Ivanova, T. Uncertainty Asse
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Arnold, C. Precision Velocity Measu
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19 Abridged Agenda Sunday March 4,
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21 Tuesday March 5, 2013 Time Met E
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23 Thursday March 7, 2013 Time Met
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Book of Abstracts Session AA ND2013
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multi-foil Parallel Plate Avalanche
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A Regional Coupled-channel Dispersi
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show the versatility of the code in
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[h] Table 1: Comparison of all the
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step was to determine which detecto
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In an effort to maintain the qualit
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Advances in Reactor Physics Linking
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sponsored the work presented in thi
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A revolutionary nuclear data system
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done in Ref. [1]. We demonstrate th
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CD 4 2:40 PM Development of a Syste
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with a central cavity where small s
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C. Arnold, E. Bond, T. Bredeweg, M.
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DA 3 4:20 PM Characterization and P
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detectors at the newly constructed
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Lead and lead-based alloys are - am
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of the setup. One option explored i
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DC 2 4:00 PM Improved Capture Gamma
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DC 5 5:00 PM Thermal Neutron Cross
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M.R. Gilbert, L.W. Packer, S. Lille
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Correlations Between Nuclear Charge
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Community’s 7th Framework Program
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we achieve very good separation of
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analysis of neutron leakage spectru
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a lower nuclear temperature than th
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Tungsten occurs naturally in five i
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for the combined use of integral ex
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in XUNDL and bibliographic informat
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former case, more realistic covaria
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WInfried Zwermann, Kiril Velkov, An
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LA-UR-12-23712 The ENDF/B-VII.1 [1,
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comparison of results C/E of fissio
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Session GA Evaluated Nuclear Data L
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Session GC accelerator applications
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Session GD Antineutrinos Tuesday Ma
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M. Fallot, S. Cormon, M.Estienne, V
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for extraction of very rare isotope
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and neutron multiplicity, informati
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as Monte Carlo simulations, and inc
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on its surface. The amplification t
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direction was recently used at n TO
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were chemically separated and the 2
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Strontium-82 Production at ARRONAX
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A. Guertin, C. Duchemin, F. Haddad,
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expected via an (n,γ) reaction. Pr
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Shinsuke Nakayama, Shouhei Araki, Y
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specific feature of the procedure e
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good timing characteristics.Example
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Materials and Measurements, Retiese
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derive reliable covariances from ta
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Concerns about the limits of worldw
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Accurate and reliable nuclear data
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Facility (HRIBF) at Oak Ridge Natio
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CALIFA, a Calorimeter for the R3B/F
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a modified Lorentzian model (MLO) o
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enchmark for existing atomic mass p
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A significant breakthrough in our t
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and the neutron and proton emission
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horizontal plane, the measured posi
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The high precision of recent measur
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Session JF Neutron Cross Section Me
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Alamos National Laboratory, Los Ala
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During more than four decades since
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KC 2 2:00 PM R-matrix Analysis for
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new covariance contributions to the
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importance in nuclear technology, a
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source SINQ (Swiss Spallation Neutr
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KF 2 2:00 PM MANTRA: An Integral Re
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J. P. Lestone, E. F. Shores Los Ala
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LA 5 5:00 PM Measurements relevant
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elow the neutron separation energy
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The A = 130 Solar-System r-process
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espectively, and identified approxi
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W. Zwermann Gesellschaft fuer Anlag
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LC 5 5:00 PM Uncertainty Study of N
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solving the quantum three-body prob
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Session LE Evaluated Nuclear Data L
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LE 5 5:00 PM Method of Best Represe
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for 89 fission products (representi
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Impact of the Energy Dependent DDXS
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from non 1/v behavior of nuclei. Mo
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evaluation (including covariances)
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system without isotope separation.
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NC 3 11:20 AM Propagation of Nuclea
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Results of the first complete compi
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Arjan Koning and Dimitri Rochman Nu
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calculating their mathematical mome
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The 33 S(n,α) cross section is of
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OA 2 2:00 PM Event-by-Event Fission
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available for ENDF/B-VII. The obser
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egions: the resolved resonances ran
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y the screening potential predicted
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[1] Y. Kojima et al., Nucl. Instr.
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y the emitted neutron. The Versatil
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enchmarking, the excitation functio
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PA 1 3:30 PM Investigation of Neutr
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as well as for a variety of Minor A
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Society, Vol. 59, No. 2, August 201
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A. Hermanne, R. Adam-Rebeles Cyclot
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We measured the isomeric yield rati
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the trends in the experimental data
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However, experiments often measure
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Statistical description of the gamm
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fragments formed are highly neutron
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F. Farget, J. Pancin GANIL, Caen, F
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ZPR-6/10 cores were applied as comp
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each nucleus in agreement with unce
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atios) is performed. In relation to
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school in science or engineering. I
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programs demanding only one compuls
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gamma-ray spectra will be theoretic
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RA 3 11:20 AM A Microscopic Theory
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Laboratory, Oak Ridge, Tenn., Novem
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Session RD Safeguards and Security
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Seeking Reproducibility in Fast Cri
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RE 4 11:40 AM Verification of Curre
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that a lot of them generally descri
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R. Hirschi, A. Hungerford, G. Magko
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- a density of levels too low for w
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the MONTEBURNS(1.0)-MCNP5-ORIGEN(2.
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The Nuclear Science References (NSR
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Page 286 and 287: For experimental determination of t
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Page 294 and 295: Measurement of Activation Cross Sec
Page 296 and 297: PR 66 Processing and Validation of
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Page 300 and 301: PR 74 Resonance Analysis of the 233
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Page 310 and 311: Differential Cross Sections for the
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Page 314 and 315: various benchmark tests. The mainly
Page 316 and 317: PR 104 Evaluations for n+ 54,56,57,
Page 318 and 319: PR 109 Recent LAQGSM Developments a
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Page 324 and 325: PR 120 Coupled-Channel Models of Di
Page 326 and 327: PR 124 Nuclear Data Evaluation and
Page 328 and 329: physicist. - There is no perfect se
Page 330 and 331: Manturov, M.N. Nikolaev, A.M. Tsibo
Page 332 and 333: Vasiliev, W. Wieselquist and H. Fer
Page 334 and 335: Author Index 1, Vojtěch Rypar, PR
Page 336 and 337: HF 5, KD 4, LA 3, LA 6, LA 7, LA 8,
Page 338 and 339: Dunn, M. E., BF 4, RC 3 Dupont, Emm
Page 340 and 341: Gulliford, Jim, CE 1 Gunsing, Frank
Page 342 and 343: Kahl, David, HD 7 Kahler, A. C., CA
Page 344 and 345: Lehaut, G., PD 6 Leinweber, Greg, L
Page 346 and 347: Munkhsaikhan, J., HC 7 Mura, Luis F
Page 348 and 349: Prael, Richard E., PE 5 Praena, Jav
Page 350 and 351: Sheets, S., CF 2 Shen, Qingbiao, PC
Page 352 and 353: Typel, S., JA 3 Tyutyunnikov, S., L
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