TY - GEN
T1 - Three-dimensional neutron transport with novel local-global coupling
AU - Lewis, E. E.
AU - Smith, M. A.
AU - Palmiotti, G.
N1 - Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2008
Y1 - 2008
N2 - A new approach for coupling lattice and whole core neutron transport calculations, which was previously applied to two-dimensional problems, is generalized to three-dimensions. The method eliminates the need for spatial homogenization of cross sections at the pin-cell or fuel assembly level. This is accomplished by expressing the interface conditions for heterogeneous pin-cell sized response matrices as spherical harmonic expansions. The expansions are partitioned into low and high order moments, and reflective conditions applied to the high order moments. This results in response matrices of greatly decreased dimension that partially decouple periodic lattice effects from global flux gradients. The method is implemented as modifications to the three-dimensional variational nodal code VARIANT, and applied to a MOX fuel assembly with partially inserted control rods as specified in the OECD/NEA C5G7 benchmark.
AB - A new approach for coupling lattice and whole core neutron transport calculations, which was previously applied to two-dimensional problems, is generalized to three-dimensions. The method eliminates the need for spatial homogenization of cross sections at the pin-cell or fuel assembly level. This is accomplished by expressing the interface conditions for heterogeneous pin-cell sized response matrices as spherical harmonic expansions. The expansions are partitioned into low and high order moments, and reflective conditions applied to the high order moments. This results in response matrices of greatly decreased dimension that partially decouple periodic lattice effects from global flux gradients. The method is implemented as modifications to the three-dimensional variational nodal code VARIANT, and applied to a MOX fuel assembly with partially inserted control rods as specified in the OECD/NEA C5G7 benchmark.
UR - http://www.scopus.com/inward/record.url?scp=79953852869&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79953852869&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:79953852869
SN - 9781617821219
T3 - International Conference on the Physics of Reactors 2008, PHYSOR 08
SP - 589
EP - 594
BT - International Conference on the Physics of Reactors 2008, PHYSOR 08
PB - Paul Scherrer Institut
T2 - International Conference on the Physics of Reactors 2008, PHYSOR 08
Y2 - 14 September 2008 through 19 September 2008
ER -