Št. zadetkov: 10
Magistrsko delo
Oznake:
nuclear engineering;computational fluid dynamics;water activation;irradiation facility;TRIGA reactor;
Water, typically used as the primary coolant in facilities such as fusion and fission reactors, could be exposed to a large amount of neutrons causing water activation. This phenomenon could cause radiation damage to electrical components and increase the dose to personnel. As there are only few sou ...
Leto:
2022
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Magistrsko delo
Oznake:
nuclear engineering;TRIGA Mark II reactor;hydrogen distribution;multiplication factor;uranium;zirconium hydride;neutron flux;Monte Carlo method;
One potential issue with uranium-zirconium hydride (U-ZrH) fuel is that the hydrogen redistributes in the hydride when thermal and concentration gradients are present. The spatial hydrogen distribution within the fuel element depends on the history of operation and temperature profile. After a long ...
Leto:
2023
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Magistrsko delo
Oznake:
sklopljene simulacije;računska dinamika tekočin;nevtronski preračuni;HTTR reaktor;OpenFOAM;Serpent;Monte Carlo simulacije;multiphysics;coupled simulations;CFD-neutronics;HTTR;thermal-hydraulics;Monte Carlo;
Adequate safety analysis is needed for generation IV Gas Cooled Reactors (GCRs), as nuclear reactor safety is challenged by the complexity of the different physical phenomena. High-fidelity modeling is achieved by a comprehensive coupling of these phenomena. This master’s thesis provides a neutronic ...
Leto:
2023
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Magistrsko delo
Oznake:
reactor physics;neutron flux;fission rate;Monte Carlo method;control rods;neutron absorber;Serpent code;
An innovative design of low-absorption control rods has been proposed for power
regulation of a nuclear reactor operating in a load-following mode. Control rods for
power regulation contain materials with lower absorption cross sections and lower
reactivity worth than regular, shutdown ‘black’ co ...
Leto:
2023
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Magistrsko delo
Oznake:
jedrska tehnika;jedrsko gorivo;TRISO prevlečeno mikrokapsulirano gorivo;termična analiza;mikro modularni reaktor;nuclear engineering;nuclear fuel;TRISO coated microencapsulated particles;thermal analysis;Micro Modular Reactor;
A new concept of nuclear fuel is considered. Recently, the Ultra Safe Nuclear Corporation has developed a 15 MW thermal powered Micro Modular Reactor (MMR) that uses Tristructural isotropic coated fully ceramic microencapsulated fuel. Instead of conventional graphite matrix, the fuel kernels are pla ...
Leto:
2023
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Magistrsko delo
Oznake:
nuclear safety;severe accidents;debris bed coolability;quenching modeling;artificial neural network;
In the event of a severe nuclear accident, loss of core cooling can lead to core degradation and melting, which could finally result in the formation of a porous debris bed outside the reactor pressure vessel. Ensuring debris bed coolability through top-flooding is important for preventing the progr ...
Leto:
2026
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Magistrsko delo
Oznake:
gamma spectrometry;fuel elements;research reactors;fission products;fuel burnup;
The concept of nuclear fuel burnup is introduced alongside some of its main applications. The fuel burnup equations are developed for its theoretical estimation and the gamma spectrometry technique is introduced as part of the non-destructive assays with its advantages, disadvantages and fuel burnup ...
Leto:
2021
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Magistrsko delo
Oznake:
neutron transport;cold neutrons;nuclear reactions;neutron scattering;neutron absorption;cross sections;
According to some conventions, cold neutrons range from energies of 0.1 meV to 5 meV. Within this energy range, the cross sections for scattering and radiative capture are clearly outside the neutron resonance region. The need for increased accuracy in these cross section values arises from the disc ...
Leto:
2023
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Magistrsko delo
Oznake:
nuclear engineering;small modular reactor;supercritical water;OpenMC;Monte Carlo;
In this thesis, a detailed model of the ECC-SMART small-modular supercritical-water reactor has been made using the OpenMC Monte Carlo code. For this purpose, three models have been developed with different levels of fidelity: a 2D infinite lattice pin-cell model, a 3D finite-length fuel assembly mo ...
Leto:
2025
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Magistrsko delo
Oznake:
nuclear reactors;light water reactors;decay heat;spent nuclear fuel;Monte Carlo;Clab;
This thesis extends the study of decay heat calculations in SUBATECH Laboratory focusing on the validation and verification in decay heat calculations in light water reactor assembly, presenting a decay heat calculation benchmark performed with the Serpent 2 Monte Carlo code and the ENDF/B-VII.1 nuc ...
Leto:
2026
Vir:
Fakulteta za matematiko in fiziko (UL FMF)