Search for dissertations about: "neutron fluxes"

Showing result 1 - 5 of 6 swedish dissertations containing the words neutron fluxes.

  2. 1. Novel Diagnostics and Computational Methods of Neutron Fluxes in Boiling Water Reactors

    Author : John Loberg; Michael Österlund; Thomas Smed; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Void; BWR; neutron fluxes; channel bow; MCNP; 2D 3D; Physics; Fysik;

    Abstract : The focus in this thesis is to improve knowledge of the BWR related uncertainties void, channel bow, and control rods. The presence of void determines the moderation of neutrons in BWRs. A high void fraction is less efficient in moderating neutrons than a low one. READ MORE

  4. 2. Antiparticle identification studies for the PAMELA satellite experiment

    Author : Jens Lund; Mark Pearce; Tuneyoshi Kamae; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Space technology; PAMEL; satellites; astroparticle physics; antiparticles; calorimeters; Rymdteknik; Space engineering; Rymdteknik;

    Abstract : The PAMELA satellite experiment will soon be launched and during its 3 year mission perform measurement of charged particle fluxes in the cosmic radiation. PAMELA is specifically designed to identify antiprotons and positrons in the vast background of other charged particles. READ MORE

  5. 3. Assessment and improvements of thermal-hydraulic correlations and methods for the analysis of the Jules Horowitz Reactor

    Author : Alberto Ghione; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Flow instability; Uncertainty; Narrow channels; Jules Horowitz Reactor; Safety analysis; Critical heat flux; Thermal-hydraulic correlations; Heat transfer; Best-Estimate; Material Testing Reactor;

    Abstract : Nuclear research reactors are used to test materials for current and future nuclear technologies, and to produce radioisotopes for medical purposes. Most of the existing Material Testing Reactors in Europe have operated for more than 50 years and new ones are needed. READ MORE

  6. 4. Analysis methodology for RBMK-1500 core safety and investigations on corium coolabiblty during a LWR sever accidnet

    Author : Audrius Jasiulevicius; KTH; []
    Keywords : RBMK. Light water reactor. Core analysis; transient analysis; reactor dynamics;

    Abstract : This thesis presents the work involving two broad aspectswithin the field of nuclear reactor analysis and safety. Theseare: - development of a fully independent reactor dynamics andsafety analysis methodology of the RBMK-1500 core transientaccidents and - experiments on the enhancement of coolabilityof a particulate bed or a melt pool due to heat removal throughthe control rod guide tubes. READ MORE

  7. 5. Development of an Improved Thermal-Hydraulic Modeling of the Jules Horowitz Reactor

    Author : Reijo Pegonen; Henryk Anglart; Yann Bartosiewicz; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Jules Horowitz Reactor; CATHARE2; STAR-CCM ; FLICA4; Material Testing Reactor; Computational Fluid Dynamics; System code; Reactor modeling;

    Abstract : The newest European high performance material testing reactor, the Jules Horowitz Reactor, is under construction at CEA Cadarache research center in France. The reactor will support existing and future nuclear reactor technologies, with the first criticality expected at the end of this decade. READ MORE