Essays about: "Severe accident"

Showing result 1 - 5 of 31 essays containing the words Severe accident.

  1. 1. Uncertainty Analysis : Severe Accident Scenario at a Nordic Nuclear Power Plant

    University essay from Högskolan Dalarna/Institutionen för information och teknik

    Author : Josefin Hedly; Mikaela De Young; [2023]
    Keywords : Nuclear power plant; microdata analysis; Random Forest; k-Nearest Neighbor; SVM;

    Abstract : Nuclear Power Plants (NPP) undergo fault and sensitivity analysis with scenario modelling to predict catastrophic events, specifically releases of Cesium 137 (Cs-137). The purpose of this thesis is to find which of 108 input-features from Modular Accident Analysis Program (MAAP)simulation code are important, when there is large release of Cs-137 emissions. READ MORE

  3. 2. Feasibility of reintroduction of European Bison (Bison bonasus) to Sweden with focus on traffic accidents

    University essay from SLU/Southern Swedish Forest Research Centre

    Author : Michael Topszewski; [2023]
    Keywords : wildlife-vehicle collision; risk prediction; reintroduction feasibility; european bison; Bison bonasus; moose; Alces alces; Human-wildlife conflict;

    Abstract : The historical occurrence of European bison (Bison bonasus) in Sweden during the early Holocene emphasizes the ecological significance for a potential reintroduction. The European bison, the largest herbivore on the European continent, is a keystone species with a significant influence on ecosystem dynamics. READ MORE

  4. 3. Modelling of liquid leakage with ASTEC in a severe accident of a PWR

    University essay from KTH/Fysik

    Author : Thomas Begey; [2022]
    Keywords : Nuclear Physics; Modelling; Iodine Chemstry; Nuclear Safety; Kärnfysik; modellering; jodkemi; kärnsäkerhet;

    Abstract : In a nuclear reactor, in case of a severe accident occurs, backup circuits are usedlike SIS and CSS, flooding the reactor with water. This might lead to many liquidleakages outside the reactor containment building. READ MORE

  5. 4. A Numerical Study of Melt Pool Heat Transfer in the IVR of a PWR

    University essay from KTH/Fysik

    Author : Yuer Zhao; [2021]
    Keywords : In-vessel melt retention; corium pool; Zr oxidation ratio; melt pool convection; CFD; SST k-ω turbulence model; Smältretention i kärlet; koriumpöl; Zr-oxidationsförhållande; konvektion i en smältpöl; CFD; SST k-ω turbulensmodell;

    Abstract : This thesis aims to provide the thermal condition of melt pool convection by CFD simulation, which is important to the assessment of the invessel melt retention (IVR) strategy widely adopted in Generation III pressurized water reactors (PWRs). As a severe accident mitigation measure, the IVR strategy is realized through external cooling of the lower head of a reactor pressure vessel (RPV). READ MORE

  6. 5. Evaluation of Epistemic Uncertainties in Probabilistic Risk Assessments : Philosophical Review of Epistemic Uncertainties in Probabilistic Risk Assessment Models Applied to Nuclear Power Plants - Fukushima Daiichi Accident as a Case Study

    University essay from KTH/Filosofi

    Author : Omed A. Rawandi; [2020]
    Keywords : Probabilistic Risk Assessment; PRA; Probabilistic Safety Assessment; PSA; Uncertainty; Epistemic Uncertainty;

    Abstract : Safety and risk assessment are key priorities for nuclear power plants. Probabilistic risk assessment (PRA) is a method for quantitative evaluation of accident risk, in particular severe nuclear core damage and the associated release of radioactive materials into the environment. READ MORE