Sökning: "Cs-137"

Visar resultat 1 - 5 av 14 uppsatser innehållade ordet Cs-137.

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

   Master-uppsats, Högskolan Dalarna/Institutionen för information och teknik

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

   Sammanfattning : 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. LÄS MER

3. 2. Uptake and retainment of radionuclides in edible mushrooms – from fruiting to cooking

   Master-uppsats,

   Författare :Delshad Mansour Ayoubi; [2022-12-06]
   Nyckelord :Medical physics; Activity concentration; Transfer coefficient; Dose;

   Sammanfattning : Purpose: The purpose of this study was to study the uptake, distribution and transfer of Mn-54, Zn-65, U-238, U-235, U-234, and Po-210 in mushrooms and their respective caps and stalks, the effects of chelates and ligands, and the potential release of radionuclides during a cooking procedure. Introduction: Fungi are organisms that are composed of a fruiting body (mushroom) and tubular hyphae, that branches out into complex networks called mycelium. LÄS MER

4. 3. Validering av Ecolego för modellering i enlighet med PSA nivå 3 : Beräkning av markdeposition av radionuklider vid fiktiv svår härdskada vid Forsmarks kärnkraftverk

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

   Författare :Olivia Winestedt; [2022]
   Nyckelord :PSA nivå 3; Probabilistisk säkerhetsanalys; Ecolego; GPM;

   Sammanfattning : The scope of this project is to investigate if the software Ecolego is suitable for creating models in accordance with level 3 PSA, with the goal of creating a model calculating the possible outcomes for the radiological impact at 20 km distance resulting from a fictional severe nuclear accident at the Forsmark Nuclear Power Plant. This report aims to answer the questions “What is the concentration on the ground (kBq/m2), at a distance of 20 km, 30 days and 10 years after the fictional severe nuclear accident, with and without filtered venting” and “Is Ecolego a suitable software for level 3 PSA models?” The source term for the fictional severe nuclear accident is made to resemble the actual source term from the Fukushima Daiichi accident including the radionuclides Cs-134, Cs-136, Cs-137, I-131, I-132, I-133 and Te-132. LÄS MER

5. 4. Monte-Carlo response for mobile gamma spectroscopy in fallout affected residential areas

   Master-uppsats, Uppsala universitet/Tillämpad kärnfysik

   Författare :William Lindberg; [2021]
   Nyckelord :mobile gamma spectroscopy; SERPENT2; Monte-Carlo;

   Sammanfattning : Historically, two nuclear power plant incidents have led to major releases of radioactive isotopes into the environment. In the unfortunate event that such an incident would occur in Sweden, the national emergency preparedness has set-up carborne detector systems which can be used to map radionuclides in fallout affected areas. LÄS MER

7. 5. Utläsning av jonkammardata

   Uppsats för yrkesexamina på grundnivå, Umeå universitet/Institutionen för tillämpad fysik och elektronik

   Författare :Isak Larsson; [2020]
   Nyckelord :ion chamber; radioactivity; radiopharmaceuticals; measurement software; python; jonkammare; radioaktivitet; radiofarmaka; mätprogram; python;

   Sammanfattning : Tracercenter på Norrlands Universitetssjukhus producerar radiotracers. För att mäta aktiviteten hos de radioaktiva isotoperna används idag en jonkammare tillsammans med mjukvara byggt på Windows XP. Målet med det här examensarbetet är att bygga ny mjukvara som är kompatibelt med Windows 10. LÄS MER