Essays about: "RELAP5"

Showing result 1 - 5 of 10 essays containing the word RELAP5.

1. 1. Using CFD to investigate casue of vibrations in feed-water system

   University essay from KTH/Strömningsmekanik och Teknisk Akustik

   Author : Maryam Dabbaghitehrani; [2019]
   Keywords : ;

   Abstract : Computational fluid dynamics from large scale thermo-hydraulic simulation in 1D to large eddy simulation in 3D, were applied in this master thesis to study cause of vibrations in a feed-water system downstream the connected pumps. In the first step, the fluid flow of the pumps in RELAP5 simulations was disturbed by the blade passing sinusoidal vibrations to study their propagation in the piping system over time. READ MORE

3. 2. Analysis of the flow of secondary steam through a reheater using 3D CFD

   University essay from KTH/Mekanik

   Author : Ida Lindell; [2019]
   Keywords : ;

   Abstract : In this study 3D CFD was used to study the mass flow distribution in a reheater in a nuclear power plant. The aim was to see if 3D-modeling provide different results than traditionally used 1D-analysis. Models with detailed geometry were created for a section of the tube package in the reheater to obtain pressure drop coefficients. READ MORE

4. 3. Swing check valvecharacterization: 3D CFDvalidation of one dimensionalmodels used in RELAP5

   University essay from KTH/Mekanik

   Author : Giacomo Vavassori; [2017]
   Keywords : ;

   Abstract : In a previous thesis work a swing check valve was studied with CFD analysisin order to nd correlations that could provide a good input for a onedimensionalmodel of the same. In this document, starting from the previousthesis results and using the model by Li and Liou as the reference work, a checkvalve is investigated and the hydraulic torque coecients identied. READ MORE

5. 4. 3D-modeling of swing check valve with connection to dynamic behavior used in system studies

   University essay from Lunds universitet/Institutionen för energivetenskaper

   Author : Christoffer Björk; [2015]
   Keywords : Swing check valve; fluid mechanics; pressure surge; waterhammer; Fluent; Technology and Engineering;

   Abstract : This Master’s Thesis is the result of the collaboration between The Technical Faculty of Lund University and TÜV NORD Sweden AB. Focus has been directed towards the nuclear industry where this thesis is one of several other Master’s Theses regarding the dynamic modeling of a swing check valve. READ MORE

6. 5. CFD-analysis of buoyancy-driven flow inside a cooling pipe system attached to a reactor pressure vessel

   University essay from Linköpings universitet/Mekanisk värmeteori och strömningslära; Linköpings universitet/Tekniska högskolan

   Author : Jens Petersson; [2014]
   Keywords : CFD; OpenFOAM; LES; nuclear reactor pressure vessel;

   Abstract : In this work a cooling system connected to a reactor pressure vessel has been studied using the CFD method for the purpose of investigating the strengths and shortcomings of using CFD as a tool in similar fluid flow problems within nuclear power plants. The cooling system is used to transport water of 288K (15°C) into a nuclear reactor vessel filled with water of about 555K (282°C) during certain operating scenarios. READ MORE