کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8066985 1521078 2018 22 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical methods applied to pin power reconstruction based on coarse-mesh nodal calculation
ترجمه فارسی عنوان
روش های عددی برای بازسازی توان پین با استفاده از محاسبه گره های درشت مش استفاده می شود
کلمات کلیدی
بازسازی قدرت پین، محاسبه طبیعی، روش های عنصر محدود روش های متمایز محدود،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
چکیده انگلیسی
The proposed reconstruction processes combine the two-dimensional (2D) neutron diffusion equation discretized by finite difference method (FDM) and Galerkin finite element method (GFEM) with homogeneous flux distributions. The Finite Element Reconstruction Method (FERM) uses a homogeneous flux distribution over the extremities of each interval that constitute the faces of the fuel assembly (FA). In turns, the Finite Difference Reconstruction Method (FDRM) uses a homogeneous flux distribution over each interval that constitute the faces of the fuel assembly (FA). These flux distributions are obtained for each face of the FA from one-dimensional (1D) polynomial expansions. Such boundary conditions (flux distributions) are based on the average fluxes on the node faces, which are provided by the coarse-mesh nodal calculation performed in homogeneous nodes with dimensions of a FA. The Nodal Expansion Method (NEM) is used for nodal calculation and also provides the multiplication factor of the problem. These reconstruction methods use homogeneous nuclear parameters providing homogeneous flux distributions within the FA. The modulation method is applied to obtain heterogeneous distributions within the FA. To validate the results obtained by the reconstruction methods, such reconstructed heterogeneous distributions are compared with the reference values and with reconstruction performed by the PARCS code. The results show the good accuracy and efficiency of both methods.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Annals of Nuclear Energy - Volume 118, August 2018, Pages 291-312
نویسندگان
, , , ,