Thesis (M.Ing. (Nuclear Engineering))--North-West University, Potchefstroom Campus, 2008.

Traditionally coupled field reactor analysis has been carried out using several loosely coupled solvers, each having been developed independently from the others. In the field of multi-physics, the current generation of object-oriented toolkits provides robust close coupling of multiple fields on a single framework. This research investigates the suitability of such frameworks, in particular the Open-source Field Operation and Manipulation (OpenFOAM) framework, for the solution of spatial reactor dynamics problems. For this a subset of the theory of the Time-dependent Neutronics and Temperatures (TINTE) code, a time-dependent two-group diffusion solver, was implemented in the OpenFOAM framework. This newly created code, called diffusionFOAM, was tested for a number of steady-state and transient cases. The solver was found to perform satisfactorily, despite a number of numerical issues. The object-oriented structure of the framework allowed for rapid and efficient development of the solver. Further investigations suggest that more advanced transport methods and higher order spatial discretization schemes can potentially be implemented using such a framework as well. / Thesis (M.Ing. (Nuclear Engineering))--North-West University, Potchefstroom Campus, 2008.

Traditionally coupled field reactor analysis has been carried out using several loosely coupled solvers, each having been developed independently from the others. In the field of multi-physics, the current generation of object-oriented toolkits provides robust close coupling of multiple fields on a single framework. This research investigates the suitability of such frameworks, in particular the Open-source Field Operation and Manipulation (OpenFOAM) framework, for the solution of spatial reactor dynamics problems. For this a subset of the theory of the Time-dependent Neutronics and Temperatures (TINTE) code, a time-dependent two-group diffusion solver, was implemented in the OpenFOAM framework. This newly created code, called diffusionFOAM, was tested for a number of steady-state and transient cases. The solver was found to perform satisfactorily, despite a number of numerical issues. The object-oriented structure of the framework allowed for rapid and efficient development of the solver. Further investigations suggest that more advanced transport methods and higher order spatial discretization schemes can potentially be implemented using such a framework as well. / Thesis (M.Ing. (Nuclear Engineering))--North-West University, Potchefstroom Campus, 2008.

Detta examensarbete handlar om tillvägagångssättet för hur beredningsarbete utförs hos TROLK El & Tele AB. Beredningsarbetet innefattar landsbygdsnätet för tre områden, Hermanseröd, Fän samt Suttene i Munkedals kommun. Denna beredning ligger till grund för att kunna genomföra projektet från Fortum Distribution AB. Projektet har tillkommit då Fortum valt att investera för att säkerställa spänningskvalitén och vädersäkra nätet i ovan nämnda områden. Beredningen omfattar markägarkontakt, fältarbete, tillstånd och avtalsansökningar. Upprättande av en P2 kalkyl kommer att ske för att få en prisbild över projektets kostnader. Förläggning av kabel och placering av nätstationer skall även fastställas åt nätägaren. Den spänningsnivå nätet berörs av är upp till 12kV som kommer att transformeras ner till 0,4kV för abonnenter. Projektet omfattar tre nätstationer, ca 2,7 km msp-kabel, ca 0,5 km lsp-kabel, 1 st. kabelskåp samt ca 1,7 km rasering av friledning. Sammanfattningen av fältarbetet som genomförts är att projektörens förslag av kabelförläggning kommer att eftersträvas till största del, med undantag för vissa problematiska platser där kabelförläggningen kommer att ändras. / This thesis is about the approach how the preparation work is done at TROLK El & Tele AB. The preparation work includes three areas, Hermanseröd, Fän and Suttene in Munkedal municipality. This preparation is the basis for the implementation of the project from Fortum Distribution AB. The project has come when Fortum decided to invest to ensure power quality and weather secure the network in the areas that was earlier mentioned. The preparation includes landowner contact, field work, permits and contract applications. Laying of cables and placement of the substations will also be established for the network owner. The voltage level of the network that is affected is up to 12kV to be transformed down to 0.4kV for subscribers. The project includes three substations, about 2.7 kilometers medium voltage cable, approximately 0.5 kilometers low voltage cable, 1 pc, cable box and about 1.7 kilometers demolition of the overhead line. The summary of the field work carried out is that the planner proposals of cable will be pursued for the most part, except for certain problematic locations where the cable placement will be changed.