Sökning: "nuclear decay heat"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden nuclear decay heat.

1. 1. Modellering, simulering och analys av kärnreaktorn BWRX-300

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

   Författare :Erik Backlund; [2023]
   Nyckelord :Kärnkraft; SMR; små modulära reaktorer; liten modulär reaktor; kärnreaktor; BWR; BWRX-300; självcirkulation; passiv säkerhet; GE Hitachi; cykellängd; härddesign; nukleär design; Simulate5; GNF2; kärnbränsle; reaktormodell;

   Sammanfattning : The demand for fossil-free energy production is rising due to electrification and increased consumption in the energy system. There are also multiple climate goals to reach, to preserve the possibilities of a sustainable future. LÄS MER

3. 2. Development of a computational method for determining gamma energy escape from calorimeters at CLAB

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

   Författare :Amela Mehic; [2022]
   Nyckelord :Nuclear physics; Calorimeter; SNF; MCNP; Dose rate; CLAB; Gamma energy; Fuel assembly; Form function; Attenuation coefficient; Gamma spectroscopy;

   Sammanfattning : Swedish Nuclear Fuel and Waste Management Company- SKB has conducted measurement campaigns at the Swedish central interim storage facility for spent nuclear fuel- CLAB over the years, extending from year 2003 to 2019 where the gamma energy escape was acquired. At CLAB the spent nuclear fuel assembly is inserted into the calorimeter; device intended to measure temperature increase due to decay heat from the fuel assembly. LÄS MER

4. 3. Nuclide content and decay heat in ARIANE sample BM1 calculated using Serpent 2 : Impact from choice of nuclear data library

   Magister-uppsats, Uppsala universitet/Tillämpad kärnfysik

   Författare :Staffan Fors; [2022]
   Nyckelord :Tvärsnittsbibliotek kärnbränsle använt kärnbränsle reaktorfysik simulering slutförvar;

   Sammanfattning : .... LÄS MER

5. 4. Qualification of a Physical Model of Cladding Creep During Dry Storage of Spent Nuclear Fuel

   Master-uppsats, KTH/Fysik

   Författare :Robin Andersson; [2022]
   Nyckelord :Dry Storage; Thermal Creep; Zircaloy-4; Pellet-Cladding Interaction; Torrt Förvar; Termisk Krypning; Zircaloy-4; Kuts-Kapsling Interaktion;

   Sammanfattning : In dry interim storage of spent nuclear fuel, thermal creep is one of the major threats to the fuel cladding integrity due to the constant decay heat generation from the fission products and minor actinides in the fuel, and the increase in fuel rod internal pressure which is present after burnup. Plenty of research has been done on either empty cladding tubes irradiated in a research reactor, or on spent fuel that is defueled prior to the examination. LÄS MER

7. 5. Modeling The Temperature of a Calorimeter at Clab : Considering a Thermodynamic Model of The Temperature Evolution of The Calorimeter System 251

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

   Författare :Johannes Ekman; [2021]
   Nyckelord :calorimetry; calorimeter; System 251; temperature evolution; spent nuclear fuel; SNF; MATLAB; SERPENT2; Clab; nuclear decay heat; calibration measurements; thermodynamic model; gamma escape fraction; mass correction; calibration measurements; electric heater; three component system; system of ordinary differential equations; eigenvalues; eigenvalue estimation; temperature increase method; polynomial approximation of mass correction; sensitivity of mass correction; calorimeter heat capacity; mass correction uncertainty; calorimeter calibration curve; monoenergetic gamma spectrum; curve fitting of temperature as function of time;

   Sammanfattning : It is important to know the heat generated due to nuclear decay in the final repository for spent nuclear fuel. In Sweden, the heating powers generated in spent nuclear fuels are currently measured in the calorimeter System 251 at the Clab facility, Oskarshamn. LÄS MER