Sökning: "SPENT NUCLEAR-FUEL"

Visar resultat 1 - 5 av 89 avhandlingar innehållade orden SPENT NUCLEAR-FUEL.

1. 1. A Tomographic Measurement Technique for Irradiated Nuclear Fuel Assemblies

   Författare :Staffan Jacobsson Svärd; Anders Bäcklin; Ane Håkansson; Klaas van der Meer; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nuclear physics; tomography; nuclear fuel; SPECT; core physics; validation; pin power; safeguards; partial-defect verification; Kärnfysik; Nuclear physics; Kärnfysik;

   Sammanfattning : The fuel assemblies used at the Swedish nuclear power plants contain typically between 100 and 300 fuel rods. An experimental technique has been demanded for determining the relative activities of specific isotopes in individual fuel rods without dismantling the assemblies. LÄS MER

3. 2. Developments toward a novel methodology for spent nuclear fuel verification

   Författare :Moad al-Dbissi; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; nuclear safeguards; partial defect; neutron scintillator; flux gradient detector; machine learning; spent nuclear fuel; artificial neural networks;

   Sammanfattning : One of the tasks in nuclear safeguards is to regularly inspect spent nuclear fuel discharged from nuclear power reactors and verify the integrity of it, so that illegal removal and diversion of radioactive material can be promptly discovered. In the current project, which is a collaboration between Chalmers University of Technology and SCK CEN, a novel methodology for non-intrusive inspection of spent nuclear fuel is under development. LÄS MER

4. 3. The effect of dissolved hydrogen on spent nuclear fuel corrosion

   Författare :Patrik Fors; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; alpha-doped; Nuclear waste repository; Hydrogen; Solubility; Corrosion; UO2; MOX; Spent nuclear fuel; High burn-up; Groundwater;

   Sammanfattning : In case of a canister failure in a deep bedrock repository for nuclear fuel, the release of radiotoxic nuclides to the groundwater will depend on the chemical environment near the fuel surface.Due to the presence of large amounts of iron in the canister, hydrogen will be formed if the canister becomes groundwater flooded. LÄS MER

5. 4. Dynamics of Spent Nuclear Fuel Dissolution : Impact of Catalysis, Matrix Composition and Time Evolution

   Författare :Annika Carolin Maier; Mats Jonsson; Christophe Jégou; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Kemi; Chemistry;

   Sammanfattning : Worldwide, nuclear power produces a large portion of the electricity that we consume every day. While nuclear energy comes with certain advantages, waste originating from its use is of particular concern. LÄS MER

7. 5. Dissolution of fluorite type surfaces as analogues of spent nuclear fuel : Production of suitable analogues and study the effect of surface orientation on dissolution

   Författare :Jose Godinho; Sandra Piazolo; Tonci Balic-Zunic; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; fluorite; spent nuclear fuel; crystal structure; CeO2; CaF2; crystal orientation; topography; confocal profilometry; Mineralogy; Mineralvetenskap; Geology; geologi;

   Sammanfattning : It is accepted worldwide that the best final solution for spent nuclear fuel is to bury it in deep geological repositories. Despite the physical and chemical barriers that are supposed to isolate the nuclear waste for at least 100.000 years, some uncertainty factors may cause underground water to get in contact with the nuclear waste. LÄS MER