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Title: Stability and accuracy of 3D neutron transport simulations using the 2D/1D method in MPACT

Journal Article · · Journal of Computational Physics

We derived a consistent “2D/1D” neutron transport method from the 3D Boltzmann transport equation, to calculate fuel-pin-resolved neutron fluxes for realistic full-core Pressurized Water Reactor (PWR) problems. The 2D/1D method employs the Method of Characteristics to discretize the radial variables and a lower order transport solution to discretize the axial variable. Our paper describes the theory of the 2D/1D method and its implementation in the MPACT code, which has become the whole-core deterministic neutron transport solver for the Consortium for Advanced Simulations of Light Water Reactors (CASL) core simulator VERA-CS. We also performed several applications on both leadership-class and industry-class computing clusters. Results are presented for whole-core solutions of the Watts Bar Nuclear Power Station Unit 1 and compared to both continuous-energy Monte Carlo results and plant data.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Consortium for Advanced Simulation of LWRs (CASL)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1326469
Alternate ID(s):
OSTI ID: 1359305
Journal Information:
Journal of Computational Physics, Vol. 326, Issue C; ISSN 0021-9991
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 69 works
Citation information provided by
Web of Science

References (12)

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Cited By (7)

Consistent pCMFD Acceleration Schemes of the Three-Dimensional Transport Code PROTEUS-MOC journal February 2019
The Subray Method of Characteristics journal January 2019
A 2D/1D Algorithm for Effective Cross-Section Generation in Fast Reactor Neutronic Transport Calculations journal July 2018
The RAPID Fission Matrix Approach to Reactor Core Criticality Calculations journal July 2018
Improved Accuracy in the 2-D/1-D Method with Anisotropic Transverse Leakage and Cross-Section Homogenization journal September 2018
Polar Parity for Efficient Evaluation of Anisotropic Transverse Leakage in the 2D/1D Transport Method journal July 2019
Quasi-Diffusion Method with 3-D Cross Sections for TREAT Core Analysis journal December 2019

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