A Homogenization Technique for Strongly Heterogeneous Zones in Research Reactors

Autor:	Nam Zin Cho, Byung-Ho Lee, Jong Tai Lee, Se Kee Oh
Rok vydání:	1991
Předmět:	Nuclear and High Energy Physics Materials science Nuclear Energy and Engineering Nuclear reactor core Iterative method Shroud Research reactor Boundary value problem Mechanics Core model Condensed Matter Physics Material properties Homogenization (chemistry)
Zdroj:	Nuclear Technology. 94:286-296
ISSN:	1943-7471 0029-5450
DOI:	10.13182/nt91-a15810
Popis:	This paper reports on an iterative homogenization method using transport theory in a one-dimensional cylindrical cell model developed to improve the homogenized cross sections fro strongly heterogeneous zones in research reactors. The flux-weighting homogenized cross sections are modified by a correction factor, the cell flux ratio under an albedo boundary condition. The albedo at the cell boundary is iteratively determined to reflect the geometry effects of the material properties of the adjacent cells. This method has been tested with a simplified core model of the Korea Multipurpose Research Reactor. The results demonstrate that the reaction rates of an off-center control shroud cell, the multiplication factor, and the power distribution of the reactor core are close to those of the fine-mesh heterogeneous transport model.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::756215ce15151b43640ea0a67671527a https://doi.org/10.13182/nt91-a15810 Zobrazit plný text záznamu