Results 1 to 10 of about 12,741 (257)

Second order of average current nodal expansion method for the neutron noise simulation

Nuclear Engineering and Technology, 2021
The aim of this work is to prepare a neutron noise calculator based on the second order of average current nodal expansion method (ACNEM). Generally, nodal methods have the ability to fulfill the neutronic analysis with adequate precision using coarse meshes as large as a fuel assembly size. But, for the zeroth order of ACNEM, the accuracy of neutronic
N. Poursalehi, A. Abed
exaly   +5 more sources

COMPARISONS AMONG THREE COUPLING FORMS OF CYLINDRICAL NODAL EXPANSION METHODS [PDF]

EPJ Web of Conferences, 2021
Nodal expansion method (NEM) is a typical nodal method in solving neutron diffusion equation in coarse mesh spatial discretization. NEM has been extended to cylindrical geometry in previous studies. Cylindrical NEM can be realized by different forms, where the variables in the nodal coupling equations are classified as net current, flux or partial ...
Wen Yutong, She Ding, Shi Lei, Zhao Jing
openaire   +2 more sources

Expansion of the Nodal-Adjoint Method for Simple and Efficient Computation of the 2D Tomographic Imaging Jacobian Matrix [PDF]

Sensors, 2021
This paper focuses on the construction of the Jacobian matrix required in tomographic reconstruction algorithms. In microwave tomography, computing the forward solutions during the iterative reconstruction process impacts the accuracy and computational efficiency.
Samar Hosseinzadegan, Andreas Fhager, Mikael Persson, Shireen D. Geimer, Paul M. Meaney   +4 more
openaire   +4 more sources

The HEXNEM3 nodal flux expansion method for the hexagonal geometry in the code DYN3D

Annals of Nuclear Energy, 2018
Abstract This paper describes the derivation of the nodal flux expansion method HEXNEM3, its implementation into the nodal diffusion code DYN3D and the corresponding testing versus benchmarks. As in the earlier versions of expansion method HEXNEM1 and HEXNEM2, the neutron flux in a hexagonal node is expanded into superposition of orthogonal ...
Yuri Bilodid, Ulrich Grundmann, Soeren Kliem   +2 more
openaire   +4 more sources

Nodal expansion method for solution of diffusion equation in hexagonal geometry.

Journal of Nuclear Science and Technology, 1989
KOYAMA, Jun'ichi, AOYAMA, Motoo
openaire   +3 more sources

Improved Neutron Leakage Treatment On Nodal Expansion Method For Pwr Reactors

, 2012
For a quick and accurate calculation of spatial neutron distribution in nuclear power reactors 3D nodal codes are usually used aiming at solving the neutron diffusion equation for a given reactor core geometry and material composition. These codes use a second order polynomial to represent the transverse leakage term. In this work, a nodal method based
Alvim, Antonio Carlos Marques, Silva, Fernando Carvalho Da, Martinez, Aquilino Senra   +2 more
openaire   +2 more sources

Three-Dimensional Static and Dynamic Reactor Calculations by the Nodal Expansion Method [PDF]

, 1985
This report reviews various method for the calculation of the neutron-flux- and power distribution in an nuclear reactor. The nodal expansion method (NEM) is especially described in much detail. The nodal expansion method solves the diffusion equation.
openaire  

Rapid coronary artery stent computational simulation using the simplex deformable model. [PDF]

Med Eng Phys
Lee C, Zhao S, Wu W, Ramesh Bhat R, Patel P, Vardhan Trivedi Y, Munjal P, Murasato Y, Chatzizisis YS.   +8 more
europepmc   +1 more source

Leukemic Non-Nodal Mantle Cell Lymphoma Presenting with Traumatic Splenic Rupture. [PDF]

Hematol Rep
Haque M, Amraei R, Rozenova KA.
europepmc   +1 more source

Anomaly detection of fermi surface morphology in Co2MnGaxGe1-x via interpretable machine learning. [PDF]

Sci Rep
Ishikawa D, Fuku K, Miura Y, Igarashi Y, Iwasaki Y, Sakuraba Y, Yaji K, Foggiatto AL, Yamazaki T, Nagamura N, Kotsugi M.   +10 more
europepmc   +1 more source