OVERVIEW Irradiation chamber goals Nuclear decay modes Fig. 1: Table of isotopes and decays.

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Presentation transcript:

OVERVIEW

Irradiation chamber goals

Nuclear decay modes Fig. 1: Table of isotopes and decays

Neutron flux spectrum in TRIGA mk.2 irradiation ports Fig. 4: Top view of TRIGA mk. 2 reactor scheme at IJS (Jeraj, Ravnik, 1999)

Neutron flux spectrum in TRIGA mk.2 irradiation ports Radial piercing thruport Neutron flux at core full power (250kW), core 189, MCNP calculated Fig. 5: flux spectrum in Radial piercing thruport, normalised to the corresponding value at 1eV.

Neutron flux spectrum in TRIGA mk.2 irradiation ports Radial beam port Neutron flux at core full power (250kW), core 189, MCNP calculated Fig. 6: flux spectrum in Radial beam port, normalised to the corresponding value at 1eV.

Application of reactor spectrum on nuclei activation and decay

Calculation results

Calculation conclusion

TLDs Thermoluminescent dosimeters Lithium fluoride, calcium fluoride Gamma rays- material ionization Free electrons captured in crystal imperfections Heat the crystal-> releasing trapped electrons Released light counted using photomultiplier

Plans for the future

Literature Luka Snoj, Gašper Žerovnik, Andrej Trkov: Computational analysis of irradiation facilities at the JSI TRIGA reactor ( ) ( ) ( ) ( ) ed.org/EducationResources/CommunityCollege/RadiationSafety/radiation_safety_equi pment/thermoluminescent.htm ( ) ed.org/EducationResources/CommunityCollege/RadiationSafety/radiation_safety_equi pment/thermoluminescent.htm Frank Herbert Attix: Introduction to Radiological Physics and radiation dosimetry, Wiley- VCH Verlag GmbH& Co. KGaA, ISBN-13: James J. Dudersradt, Louis J. Hamilton: Nuclear Reactor Analysis, Department Of Nuclear Engineering, The University Of Michigan, John Wiley & Sons, ISBN: Ronald Allen Knief: Nuclear Engineering: Theory and Practice of Commercial Nuclear Power, Tylor & Francis, ISBN-13: George I. Bell, Samuel Glasstone :Nuclear Reactor Theory, Van Nostrand Reinhold Inc.,U.S. (December 1970), ISBN-13: