Development of angle-dependent linear source approximation for three-dimensional method of characteristics transport analysis method in STREAM. (February 2023)

• Record Type: Journal Article
• Authors: Choe, Jiwon; Lee, Deokjung
• Is Part Of: Annals of nuclear energy. Volume 181(2023)
• Publication Date: 2023-02
• Subjects: Angle dependent linear source approximation -- 3D Method of Characteristics (MOC) -- Neutron transport theory; Nuclear energy -- Periodicals; Nuclear engineering -- Periodicals; 621.4805
• DOI: 10.1016/j.anucene.2022.109572
• Languages: English
• ISSNs: 0306-4549

Abstract

Highlights: Development of angle-dependent linear source approximation. Applied to 2D/3D Method of Characteristics/Diamond Differencing method. Performance analysis using 3D pressurized core models. Abstract: This paper features the development of angle-dependent linear source (ADLS) approximation for the 2D/3D Method of Characteristics (MOC)/Diamond Differencing (DD) method and its performance analysis simulation. The ADLS MOC/DD applies the linear source approximation to two different types of sources, the sum of fission and scattering source and the angle-wise surface source appearing in the MOC/DD equation. It is demonstrated memory usage and simulation time can be reduced by increasing the source approximation order from the zeroth to the first order.