Projects / Programmes source: ARIS

Reactor Physics

Research activity

Code Science Field Subfield
2.03.00  Engineering sciences and technologies  Energy engineering   
1.07.00  Natural sciences and mathematics  Computer intensive methods and applications   

Code Science Field
T160  Technological sciences  Nuclear engineering and technology 
P170  Natural sciences and mathematics  Computer science, numerical analysis, systems, control 

Code Science Field
2.11  Engineering and Technology  Other engineering and technologies 
reactor physics, nuclear data, global reactor calculations, Monte Carlo, radiation treatment planning
Evaluation (rules)
source: COBISS
Researchers (21)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  01048  PhD Bruno Cvikl  Physics  Researcher  2009 - 2013  215 
2.  31776  PhD Dušan Čalič  Energy engineering  Technical associate  2011 - 2013  86 
3.  01116  PhD Milan Čerček  Physics  Researcher  2009 - 2013  318 
4.  36329  PhD Aljaž Čufar  Energy engineering  Junior researcher  2013  651 
5.  06743  PhD Bogdan Glumac  Energy engineering  Researcher  2009 - 2010  132 
6.  10401  PhD Tomaž Gyergyek  Physics  Researcher  2009 - 2013  414 
7.  15737  PhD Robert Jeraj  Physics  Researcher  2009 - 2013  553 
8.  03943  PhD Ivan Aleksander Kodeli  Computer intensive methods and applications  Researcher  2009 - 2013  966 
9.  30680  PhD Jernej Kovačič  Mechanical design  Researcher  2009 - 2013  234 
10.  04538  PhD Marjan Kromar  Energy engineering  Researcher  2009 - 2013  300 
11.  19167  PhD Igor Lengar  Materials science and technology  Researcher  2009 - 2013  1,200 
12.  36338  PhD Vid Merljak  Energy engineering  Junior researcher  2013  38 
13.  32163  PhD Vladimir Radulović  Energy engineering  Junior researcher  2009 - 2013  244 
14.  05097  PhD Matjaž Ravnik  Energy engineering  Researcher  2009  439 
15.  15739  Dušan Rudman    Technical associate  2009 - 2013 
16.  27760  PhD Urban Simončič  Physics  Researcher  2009 - 2013  120 
17.  27819  PhD Luka Snoj  Energy engineering  Researcher  2009 - 2013  1,863 
18.  08557  PhD Andrej Trkov  Energy engineering  Head  2009 - 2013  795 
19.  18276  PhD Tomaž Žagar  Energy engineering  Researcher  2009 - 2010  279 
20.  15742  Bojan Žefran    Technical associate  2009 - 2013  152 
21.  29546  PhD Gašper Žerovnik  Computer intensive methods and applications  Researcher  2009 - 2013  232 
Organisations (2)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0106  Jožef Stefan Institute  Ljubljana  5051606000  90,724 
2.  1538  University of Ljubljana, Faculty of Electrical Engineering  Ljubljana  1626965  27,771 
Research is performed in the following areas: - nuclear data evaluation, - development of new methods for reactor calculations, - numerical modelling of reactor processes, - Monte Carlo modelling of demanding geometries, - and, as a spin-off, use of Monte Carlo methods for inverse treatment planning in medicine. Nuclear data evaluation comprises compilations, evaluation and maintenance of modern data libraries (ENDFB-6, JENDL). This is performed in order to develop and maintain our own database for both fission and fusion systems calculations. Research is performed also on both theoretical and experimental benchmark problems. Work on an international project WLUP (WIMS Library Updating Project) is continued. Development of new methods for reactor calculations is centered on those parts of global reactor calculations which are computationally intensive. For diffusion approximation this means the calculation of effective group homogenized macroscopic constants depending on parameters such as temperature or burnup. On the other hand, for transport problems, this means the calculation of group macroscopic crossections averaged over true neutron spectrum within a group. This enables us to attain higher efficiency on precision of the transport calculation in depth of the transport medium. Research results will be incorporated into our program package CORD which is used for NPP Krško core designing and into transport code DORT, which is used for activation calculations of the NPP Krško and TRIGA biological shield. Computational modelling will cover the research into nuclear fuel burnup and also activation of reactor components. Primary goal is to ammeliorate burnup models in basic reactor computer codes in order to be able to verify them with experimental data obtained from the measurements on the TRIGA reactor. Method for reactor activation calculations will be expanded in order to cover the activation of metallic component for both experimental and power reactors. Using Monte Carlo methods, we will continue with preparation and calculation of both research and power reactor benchmarks. We intend to use various versions of MCNP code together with ENDFB-6 crossection data. We will study variance reduction methods (DSA and WW) in demanding reactor geometries, aimed to precise determination of biological shield and metallic reactor parts activation. We will continue the development of the inverse treatment planning in medicine (oncology). This method is very promising and is already being clinically implemented in spite of being highly computationally demanding. Research will be performed together with University of Wisconsin, Madison, USA.
Significance for science
Future operation of the JET tokamak depends, amongst other factor, also on proper measurement of neutron yield, which has to be within the operational range. All scientific projects require meaningful results of the neutron yield measurements for the characterization of individual pulses. Verification of neutron measurement is important also for the future operation in the D-D and D-T mode. Application and development of experimental and computational methods that we are going to develop will be later extended to the future operation of the D-T mode and will contribute significantly to the activities planned in JET tokamak. The whole process of understanding and improving the knowledge of the neutron yield measurements is also important for the future fusion reactor ITER, where the methods for the calibration of neutron detectors are yet to be determined. Accurate knowledge of the reactor’s fusion power, which can be measured only through the neutron measurements, is extremely important for the development of fusion as a sustainable and environmentally friendly source of energy. Evaluated results of the experiment will serve as a reference experiment for the verification and validation of computational methods and nuclear data in fusion tokamaks and other similar systems, such as conventional fission reactors, which have similar materials and virtually the same detectors. Reference model will be used for the verification and validation of Monte Carlo variance reduction methods and for the validation of nuclear data libraries.
Significance for the country
The knowledge obtained and the experience gained will be directly applicable to the Slovenian Nuclear Power Plant Krško. The results of our research will be used for: • determination of the nuclear detectors response function in classical fission reactors, which is important for accurate and reliable reactor operation and determination of reactor measured parameters, • accuracy improvements in the determination of the vessel irradiation fluence, which is of paramount importance for the determination of reactor life time and possible life extension, • accuracy improvements in the determination of material activation outside the reactor vessel, which is important for the determination of radioactive waste during the plant decommissioning. In power reactors the direct calibration of thermal power with well-defined sources (such as Cf-252) is nearly impossible because of practical and financial limitations. Research reactors are too small and not simple to be a representative substitute. Therefore knowledge and experience gained on experimental fusion reactors are invaluable also for classical fission reactors.
Most important scientific results Annual report 2009, 2010, 2011, 2012, final report, complete report on dLib.si
Most important socioeconomically and culturally relevant results Annual report 2009, 2011, 2012, final report, complete report on dLib.si
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