Sökning: "BWR"

Visar resultat 1 - 5 av 43 uppsatser innehållade ordet BWR.

  1. 1. Development of a Nordic BWR plant model in APROS and design of a power controller using the control rods

    Master-uppsats, KTH/Fysik

    Författare :Jonathan Al-Ani; [2021]
    Nyckelord :APROS; Dynamic process simulation; System code; Nuclear reactor; nuclear power; BWR; Boiling Water Reactor; closed cycle; steam cycle; one-dimensional flow; Westinghouse; control rods; APROS; Dynamisk processimulering; Beräkningsmodell; Kärnkraft; BWR; Kokvattenreaktor; ångcykel; en-dimensionell flödesmodell; Westinghouse; kontrollstavar;

    Sammanfattning : In this master thesis an input-model of a Nordic BWR power plant has been developed in APROS. The plant model contains key systems and major thermohydraulic components of the steam cycle, including I&C systems (i.e. power, pressure, level and flow controls). LÄS MER

  2. 2. Validation of the Westinghouse BWR nodal core simulator POLCA8 against Serpent2 reference results

    Master-uppsats, KTH/Fysik

    Författare :Mathilde Gaillard; [2021]
    Nyckelord :Nodal Core Analysis; Monte Carlo Methods; CBH Effects; Nodal kärnanalys; Monte Carlo-metoder; CBH-effekter;

    Sammanfattning : When a new nodal core simulator is developed, like all other simulators, it must go through an extensive verification and validation effort where, in the first stage, it will be tested against appropriate reference tools in various theoretical benchmark problems. The series of tests consist of comparing several geometries, from the simplest to the most complex, by simulating them with the nodal core simulator developed and with some higher order solver representing the reference solution, in this case on the Serpent2 Monte Carlo transport code. LÄS MER

  3. 3. CFD Annular Flow Modelling Based on a Three-Field Approach

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Erik Skoog; [2020]
    Nyckelord :CFD; BWR; annular flow; deposition;

    Sammanfattning : This master thesis aim to model the annular flow that occurs in the final section between the fuel rods inside Boiling Water Reactors, by approximating the geometry to a cylindrical pipe. Simulations were performed in the software ANSYS Fluent, as a step in the development of replacing the 1D correlations currently used in the nuclear industry with CFD models in 3D. LÄS MER

  4. 4. Analys av drivdonsslitage vid Forsmarks kärnkraftverk : För drivdon på Forsmark 1 och 2

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

    Författare :Emma Ekberg Berry; [2020]
    Nyckelord :;

    Sammanfattning : This master thesis is done within the Energy Systems Engineering program at Uppsala University and performed for Forsmarks Kraftgrupp, Vattenfall. Forsmark is a nuclear power plant that consists of three BWR units and is an important component for the Swedish power system. LÄS MER

  5. 5. Compilation and evaluation of validations of computer codes for spent nuclear fuel – a review

    Kandidat-uppsats, Lunds universitet/Kärnfysik; Lunds universitet/Fysiska institutionen

    Författare :Staffan Fors; [2019]
    Nyckelord :Nuclear fuel; Kärnbränsle; Slutförvar; Fissionsprodukter; Physics and Astronomy;

    Sammanfattning : This report describes a systematic review regarding validations of calculations by measurements of isotopic compositions, or decay heat, on spent nuclear fuel, SNF. 15 relevant or otherwise interesting studies, were found. Two reports were chosen among the found studies and analyzed. LÄS MER