Sökning: "bränsledesign"

Hittade 2 uppsatser innehållade ordet bränsledesign.

  1. 1. Conceptual Design of an Air-Launched Three-Staged Orbital Launch Vehicle

    Master-uppsats, KTH/Rymdteknik

    Författare :Måns Rasmussen; [2021]
    Nyckelord :Air-launched; Launch Vehicle; Three-staged; Rocket; Sun-Synchronous orbit; Solid propellant; Liquid propellant; Trajectory optimization; Nonlinear programming; JAS 39 Gripen; Fighter aircraft; Luftlanserad; Trestegsraket; Solsynkron bana; Fast bränsle; Flytande bränsle; Bananalys; Icke-linjär optimering; JAS 39 Gripen; Jaktflygplan;

    Sammanfattning : The objective of this study was to design a launch vehicle capable of deploying a nanosatellite into a Sun-synchronous orbit at 500 km orbital altitude from the JAS 39E/F Gripen fighter aircraft. This was achieved by first performing theoretical calculations for the required nozzles and solid propellant grain configurations for the first two solid stages, followed by the necessary liquid propellant configuration for the third stage. LÄS MER

  3. 2. Förbättrade effektmarginaler med radiell anrikningsfördelning för PWR-bränsle

    Uppsats för yrkesexamina på avancerad nivå,

    Författare :Mattias Åkerman; [2016]
    Nyckelord :Ringhals 4; PWR; fuel rod; fuel assembly; shielding fuel assembly; reactor core; reactor cycle; burnable absorber; peaking factor; internal peaking factor; enthalpy raise hot channel factor; radial enrichment distribution; enrichment optimization; CASMO; SIMULATE; XIMAGE; Ringhals 4; PWR; bränslestav; bränsleknippe; skärmande knippen; reaktorhärd; reaktorcykel; brännbar absorbator; intern effektformfaktor; radiell effektformfaktor; effektmarginal; radiell anrikningsfördelning; anrikningsoptimering; bränsledesign; härddesign; CASMO; SIMULATE; XIMAGE;

    Sammanfattning : In recent years, the enthalpy raise hot channel factor limit has decreased significantly due to the power upgrade of Ringhals 4 and the use of shielding fuel assemblies. The shielding fuel assemblies task are to reduce the neutron leakage to the reactor vessel and in that way extend the reactor lifetime. LÄS MER