The rod insertion method presents an efficient way of measuring the reactivity worth of control rods in a nuclear reactor. This is an inherently dynamic method, which is why we highlighted the differences between the static and the dynamic reactivity. Direct comparison of results based on the static and the dynamic reactivity relies heavily on adequate time-resolved three-dimensional numerical simulation. In the present work, this is achieved by updating the Gnomer computer program to support such calculation and verifying it on representative test cases. In the following, improvements of the rod insertion method are based on experimental data from the Krško nuclear power plant. Due to the results of the analysis, some of the methodological assumptions are retained (e.g. continuous insertion), while others are ameliorated (e.g. flux redistribution correction). A new correction is added, namely the reactivity overshoot compensation. It takes into account the dynamic effects after the control rod has reached its fully inserted state, and as such increases the total rod worth measurement consistency. Lastly, conversion from dynamic to static reactivity worth is established by following the examples in the literature and by using kinetic simulation. Thus – with the updated methodology – the rod insertion method is proven to yield excellent results in comparison to the well-established boron dilution method, and can be used as replacement.
D.09 Tutoring for postgraduate students
COBISS.SI-ID: 3170404Slovenia has two nuclear reactors, a 2 loop 2 GW PWR and a TRIGA type research reactor. The TRIGA research reactor (RR) at the Jožef Stefan Institute (JSI) in Ljubljana with thermal power 250 kW started operation in 1966. From the very beginning it was a source of knowledge and was used to train personnel in the area of nuclear energy. The training of nuclear engineers is done at the Nuclear Training Center at the JSI (1), however, the education in the field of nuclear engineering is performed at the Faculty of Mathematics and Physics (FMF), University of Ljubljana (2). In addition to the aforementioned activities, in the framework of the Eastern Europe Research Reactor Initiative (3), we also organize training courses for countries with limited access to nuclear infrastructure. Good connection between the JSI and the FMF assure that the educational course performed mostly by researchers is in touch with the latest development and findings in the field. Moreover in parallel with research activities we are also developing methods for training and education. In this paper we briefly present existing innovative methods for training and education of reactor physics and present a recently developed one, i.e. the research reactor simulator.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 30894887The following topics are considered in the lecture: Introduction Presentation of JSI activities: • Nuclear power plant Krško • TRIGA research reactor • JET fusion reactor • Computer codes • Monte Carlo calculations • Summary and possible collaborations
B.04 Guest lecture
COBISS.SI-ID: 30537255