DEVELOPMENT OF ITERATIVE TRANSPORT – DIFFUSION METHODOLOGY FOR LWR ANALYSIS

Open Access
Author:
Roberts, Damon R
Graduate Program:
Nuclear Engineering
Degree:
Master of Science
Document Type:
Master Thesis
Date of Defense:
None
Committee Members:
  • Kostadin Nikolov Ivanov, Thesis Advisor
Keywords:
  • Transport Methodology
Abstract:
The use of two group nodal diffusion calculations utilizing assembly-homogenized cross-sections and assembly discontinuity factors is a major cause of uncertainty in Light Water Reactor (LWR) core analysis. This paper presents the work being done on the development of an Iterative Transport-Diffusion Methodology (ITDM) for Light Water Reactor (LWR) core analysis in order to reproduce high-fidelity solutions of neutron transport methods in an efficient manner. The feasibility of the ITDM has been demonstrated on a set of challenging Two-Dimensional (2-D) LWR mini-core benchmark problems. The current efforts are focused on the analysis of 3-D LWR mini-core benchmark problems and the presented preliminary results for the 3-D BWR problem are very encouraging. The next steps include further improvements of the efficiency and accuracy of the ITDM and its application to realistic 3-D LWR (PWR and BWR) core models with depletion.