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Reports : Krystsina Husak , junior researcher of

Application of SSNTD method for measurements of the fission rate and the number of fission of natural uranium inside investigated assembly. Experiments with the QUINTA target assembly ( Dubna , Russia, VBLHEP JINR) . Results of 46 session (December 2012). Reports : Krystsina Husak ,

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Reports : Krystsina Husak , junior researcher of

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  1. Application of SSNTD method for measurements of the fission rate and the number of fission of natural uranium inside investigated assembly.Experiments with the QUINTA target assembly (Dubna, Russia, VBLHEP JINR).Results of 46 session (December 2012) Reports: Krystsina Husak, junior researcher of the Laboratory for Experimental Nuclear Research and Expert Analysis of Radioactive Materials of the Joint Institute for Power and Nuclear Research — Sosny

  2. Co-authors: • I.Zhuk, О.Bukhal, А.Safronava, А.Patapenka : Joint Institute for Power and Nuclear Research — Sosny Minsk, Republic of Belarus; • М.Artyushenko, V.Sotnikov, V.Voronko: National Scientific Center Kharkov Institute of Physics and Technology Kharkov Republic of Ukraine; • S. Tyutyunnikov, W. Furman, M. Kadykov: Joint Institute for Nuclear Research Dubna, Russian Federation; • A. Chinenov, V Chilap: CPTP “Atomenergomash” Moscow, Russian Federation. The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

  3. Experiments objectives were: • Research experimental studies of: • natural uranium fission rate spatial distribution in QUINTA subcritical assembly; • natural uranium fission number spatial distribution in QUINTA subcritical assembly; • Compare total fission number of natural U with results of earlier experiments. The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

  4. Experimental assembly “QUINTA” The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

  5. Sensors: track detectors coupled with natU foils lavsan (and mica) disk The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013 lavsan strip

  6. Sensors positions Plates number: 0 1 2 3 4 5 beam The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

  7. Radial distribution of fission rate.E=2 GeV. Plata 1 (Z= 13.1 cm). The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

  8. E = 2 GeV Distribution of fission rate SSNTD - lavsan strips Radial distribution Axial distribution Fission rate spatial distribution per one cm3 and one deuteron The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

  9. E = 4 GeV Distribution of fission rate SSNTD - lavsan strips Axial distribution Radial distribution Outside position/ lead , 90 cm Fission rate spatial distribution per one cm3 and one deuteron The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

  10. E = 8 GeV Distribution of fission rate SSNTD - lavsan strips Axial distribution Radial distribution Outside position/ lead , 90 cm Fission rate spatial distribution per one cm3 and one deuteron The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

  11. Number fission of natUE=2 GeVITot=(3.0±0.3)1013 Side view End face view The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

  12. Number fission of natUE=4 GeVITot=(3.1±0.3)1013 Side view End face view The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

  13. Number fission of natUE=8 GeVITot=(8.6±0.9)1012 Side view End face view The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

  14. Total number fission. In comparison with earlier runs. The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

  15. Fission rate outside QUINTA. E=2 GeV 4.00E-14 3.86E-14 Between sections 2&3 2.44E-14 2.44E-14 Between sections 3&4 Between sections 1&2 Between sections 4&5 The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

  16. Fission rate outside QUINTA. E=4 GeV 3.15E-14 2.67E-13 6.41E-14 3.91E-14 before section 1 after section 5 4.46E-14 6.20E-14 5.75E-14 The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

  17. d Fission rate outside QUINTA. E=8 GeV 4.11E-14 3.51E-14 30 cm 5.12E-14 2.48E-14 1.59E-14 after section 5 before section 1 2.46E-14 2.16E-13 5.56E-14 6.94E-14

  18. Conclusions: 1. Uranium fission rate decreases fast in radial distribution. The reasons are: • -QUINTA is deep subcritical assembly; • - Neutrons generated in interaction between incident deuterons and assembly material loose the energy rapidly due to collisions with uranium nuclei (Even one collision is enough the energy be less than fission threshold (1.4 МэВ)) 2. Total fission number of natU, calculated per a deuteron and per 1 GeV energy of the deuteron, was compared with results of RunMarch-2011, RunDecember -2011, RunMarch -2012 and RunDecember -2012. It does not depend on the primal energy of the deuteron beam. 3. Results of fission rates natU measurements at the assembly outside will be used for neutron leakage calculation. The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

  19. Thanks for attention! The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

  20. The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

  21. Multification factor = number of fission*200 MeV (fission energy) / energy brought by incident beam+1 • mf for QUINTA ≈ 3 • We have to stick to the plan. And for sudden ideas we use foils which were left. The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

  22. Empty area (0<R<4 см и 0<Z<11.5 см )is corresponding to missing uranium rods in cental part of first section. • Empty area is corresponding to missing fissile material (clearance between rods and sections). [Each section is composed of uranium rods arranged in the form of hexagonal (triangular) lattice with pitch size of 3.6 cm (aluminium covering – 0.12 cm)] The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

  23. Irregularity of fission material in QUINTA Monte-Carlo calculation Calculation procedure: • - Neutron field is symmetrical with respect to principal axis. • - Accounting of geometry fissile material spatial arrangement. The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013 Density of the fission material radial distribution at the assembly QUINTA

  24. Heat productionE=2 GeVITot=(3.0±0.3)1013 Side view End face view The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

  25. Heat productionE=4 GeVITot=(3.1±0.3)1013 Side view End face view The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

  26. Heat productionE=8 GeVITot=(8.6±0.9)1012 Side view End face view The XII-th International School-Seminar "The Actual Problems of Microworld Physics" Gomel, Belarus, July 22 - August 2, 2013

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