Sökning: "fuel rod"

Visar resultat 1 - 5 av 27 uppsatser innehållade orden fuel rod.

1. 1. Deep Neural Networks as SurrogateModels for Fuel Performance Codes

   Kandidat-uppsats, Uppsala universitet/Tillämpad kärnfysik

   Författare :Wenhan Zhou; [2023]
   Nyckelord :Transuranus; AI; Nuclear Fuel Rods;

   Sammanfattning : The core component of a nuclear power plant is the reactor and the fuel rods that supply it with fission fuel. Efficient and safe energy extraction is thus highly dependent on the reactor design and the conditions of the fuel rods. To anticipate high-quality operation and potential risks in advance, one must perform simulations on the fuel rods. LÄS MER

3. 2. Investigation of coarse-grid CFD approach for nuclear engineering application

   Master-uppsats, KTH/Fysik

   Författare :Michela Casarella; [2023]
   Nyckelord :Thermal-hydraulics; Nuclear reactor; CFD; Sub-channel; Coarse-grid; Turbulence; Pressure drop; Termisk-hydraulik; kärnreaktor; CFD; underkanal; grovkornigt nät; turbulens; tryckfall;

   Sammanfattning : In this thesis, an innovative coarse grid CFD approach is developed that aims toexploit the capabilities of sub-channel codes and CFD methods while overcoming theirlimitations. In the approach, a very coarse mesh is implemented in the CFD softwareOpenFOAM and a new wall treatment, based on the traditional concept of the wallfunction, is applied to the wall boundary conditions of the domain to take into accountthe low resolution of the grid which does not allow to effectively capture the effect of thesolid walls on the thermo-hydraulics of the flow. LÄS MER

4. 3. Assessment of How Design and Operational Parameters Affect Plutonium Production for Pressurized Heavy Water Reactors : A Study of the Ågesta, NRX and CANDU Reactors

   Kandidat-uppsats, Uppsala universitet/Institutionen för materialvetenskap

   Författare :Isak Hedberg; Stina Fredriksson; Axel Hallander; [2023]
   Nyckelord :;

   Sammanfattning : Nuclear weapons are an ever-present danger which threatens our very existence, which is whymany call for total nuclear disarmament. To do this, we need to know how many nuclear bombsthere are in the world. LÄS MER

5. 4. High spatial resolution study of local corrosion effects on BWR-fuel cladding : Using a combined method of GEANT4 and lwrChem

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Tillämpad kärnfysik

   Författare :Martin Nilsson Lind; [2023]
   Nyckelord :fission; zircaloy; corrosion; radiolysis; radiation; BWR; Monte Carlo; GEANT4; lwrChem;

   Sammanfattning : The core of a BWR constitutes a highly complex radiational and chemical environment. Nuclear fission is utilized to generate power and as a consequence, large quantities of ionizing radiation are produced. Gamma and beta-particles along with neutrons have the sufficient ranges to escape the fuel rods and deposit energy in the reactor coolant. LÄS MER

7. 5. Undersökning av ledarkonstruktion vid bränsletest : Teoretisk konceptframtagning av ledarkonstruktion

   Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Industriell teknik

   Författare :Sebastian Skans; [2022]
   Nyckelord :bränslestavar; critical heat flux; departure from nucleate boiling; kärnkraft; värmeledning;

   Sammanfattning : In nuclear power plants, during operation at high temperatures, there can occur a steam build-up around the fuel rods at an increasing rate. This inhibits the water’s effectivity in removing heat from the rods. When this occurs and reaches a critical point, the temperature in the fuel rods surges, which can lead to them being damaged. LÄS MER