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Title: Three-Dimensional Full Core Power Calculations for Pressurized Water Reactors

Abstract

We have implemented a new multilevel parallel decomposition in the Denovo discrete ordinates radiation transport code. In concert with Krylov subspace iterative solvers, the multilevel decomposition allows concurrency over energy in addition to space-angle. The original space-angle partitioning in Denovo placed an eective limit on the scalability of the transport solver that was highly dependent on the problem size. The added phase-space concurrency combined with the high-performance Krylov solvers has enabled weak scaling to 100K cores on the Jaguar XT5 supercomputer. Furthermore, the multilevel decomposition provides enough concurrency to scale to exascale computing and beyond.

Authors:
 [1];  [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1026719
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: SciDAC 2010, Chattanooga, TN, USA, 20100711, 20100715
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; DISCRETE ORDINATE METHOD; PHASE SPACE; PWR TYPE REACTORS; RADIATION TRANSPORT

Citation Formats

Evans, Thomas M, Davidson, Gregory G, and Slaybaugh, Rachel N. Three-Dimensional Full Core Power Calculations for Pressurized Water Reactors. United States: N. p., 2010. Web.
Evans, Thomas M, Davidson, Gregory G, & Slaybaugh, Rachel N. Three-Dimensional Full Core Power Calculations for Pressurized Water Reactors. United States.
Evans, Thomas M, Davidson, Gregory G, and Slaybaugh, Rachel N. Fri . "Three-Dimensional Full Core Power Calculations for Pressurized Water Reactors". United States.
@article{osti_1026719,
title = {Three-Dimensional Full Core Power Calculations for Pressurized Water Reactors},
author = {Evans, Thomas M and Davidson, Gregory G and Slaybaugh, Rachel N},
abstractNote = {We have implemented a new multilevel parallel decomposition in the Denovo discrete ordinates radiation transport code. In concert with Krylov subspace iterative solvers, the multilevel decomposition allows concurrency over energy in addition to space-angle. The original space-angle partitioning in Denovo placed an eective limit on the scalability of the transport solver that was highly dependent on the problem size. The added phase-space concurrency combined with the high-performance Krylov solvers has enabled weak scaling to 100K cores on the Jaguar XT5 supercomputer. Furthermore, the multilevel decomposition provides enough concurrency to scale to exascale computing and beyond.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {1}
}

Conference:
Other availability
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