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

JOURNAL OF COMPUTATIONAL PHYSICS

卷:326

Article

Collins, Benjamin^1,3  Stimpson, Shane^1,3  Kelley, Blake W.²  Young, Mitchell T. H.²  Kochunas, Brendan²  Graham, Aaron²  Larsen, Edward W.²  Downar, Thomas²  Godfrey, Andrew¹ 

[1] Oak Ridge Natl Lab, One Bethel Valley Rd, Oak Ridge, TN 37831 USA

[2] Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA

[3] Univ Michigan, Ann Arbor, MI 48109 USA

关键词: 2D/1D method;    MOC;    MPACT;   

DOI  :  10.1016/j.jcp.2016.08.022

来源: Elsevier

【 摘 要 】

A consistent 2D/1D neutron transport method is derived 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. This 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. Several applications have been performed 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. (C) 2016 Elsevier Inc. All rights reserved.

【 授权许可】

Free