Sökning: "Fast Reactors"

Visar resultat 1 - 5 av 53 avhandlingar innehållade orden Fast Reactors.

  1. 1. Control Rod Homogenization in Heterogeneous Sodium-Cooled Fast Reactors

    Författare :Mikael Andersson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Homogenization; Monte Carlo; Fast Reactors; Reactivity Equivalence; Control rod;

    Sammanfattning : The sodium-cooled fast reactor is one of the candidates for a sustainable nuclearreactor system. In particular, the French ASTRID project employs an axiallyheterogeneous design, proposed in the so-called CFV (low sodium effect) core, toenhance the inherent safety features of the reactor. LÄS MER

  3. 2. Developments and application of neutron noise diagnostics of sodium cooled fast reactors

    Författare :Florian Zylbersztejn; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Neutron monitoring; Neutron noise; Fast neutron reactors; Core volume fluctuations;

    Sammanfattning : The Sodium cooled Fast Reactor (SFR) is one of the six reactor types selected by the Generation-IV international forum (GIF), and the building of an industrial prototype is planned in France. The safety standard of the future SFR has to be equivalent to the EPR's. LÄS MER

  4. 3. Modeling of Fission Product Behavior in Fast Reactors

    Författare :Karl Samuelsson; Markus Piro; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Den natriumkylda snabbreaktorn är en av kandidaterna till nästa generationens kärnenergisystem. De extrema förhållanden som kärnbränslet utsätts för i en sådan rektor kan leda till säregna konsekvenser. Till dessa hör formationen av så kallad JOG (franska för Joint Oxyde-Gaine = bränsle-kapsel-fog). LÄS MER

  5. 4. Transmutation of Am in sodium fast reactors and accelerator driven systems

    Författare :Youpeng Zhang; Janne Wallenius; Gérald Rimpault; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sodium cooled fast reactor; accelerator driven system; americium; transmutation; transient analysis;

    Sammanfattning : In this thesis, the feasibility to use sodium cooled fast reactors loaded with MOX, metallic and nitride fuels for efficient transmutation of americium is investigated by performing transient analysis for cases with different americium contents in fuels, using safety parameters obtained with the SERPENT Monte Carlo code. It was then demonstrated that there is no solid limit for the Am introduction into oxide, metallic and nitride fuels that were loaded into sodium fast reactors. LÄS MER

  7. 5. Development of a Neutron Flux Monitoring System for Sodium-cooled Fast Reactors

    Författare :Vasudha Verma; Carl Hellesen; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Protection systems; safety; accidents; sodium-cooled fast reactor; instrumentation; fission chamber; self powered neutron detector;

    Sammanfattning : Safety and reliability are one of the key objectives for future Generation IV nuclear energy systems. The neutron flux monitoring system forms an integral part of the safety design of a nuclear reactor and must be able to detect any irregularities during all states of reactor operation. LÄS MER