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Accession Number DE2012-1054061
Title Status Report on Advanced Neutronics Modeling and Validation, FY2010.
Publication Date Sep 2010
Media Count 83p
Personal Author A. Marin-Lafleche A. Mohamed A. Wollaber C. H. Lee E. E. Lewis K. Derstine M. A. Smith W. S. Yang
Abstract UNIC is the neutronics component of the massively parallel, multi-physics SHARP (Simulation for High-efficiency Advanced Reactor Prototyping) framework under development at Argonne National Laboratory. During this fiscal year, the SN2ND solver, MOCFE solver, and NODAL solver received significant development to meet the needs of the SHARP project. Additional follow-on analysis of the ZPR-6/6A from the previous year was performed in addition to new analysis of the ZPR-6/7 experiments where UNIC predictions of ZPR foil activation were made against experimentally measured values. The SN2ND solver was applied to a plate-by-plate model of ZPR-6/6A using 294,912 cores of BlueGene/P and 222,912 cores of XT5, the two largest open-science high performance computing machines. The calculations proved that the SN2ND solver could be applied to heterogeneous reactor modeling problems, but more solver development (e.g., multigrid preconditioner) and computing power are required before such calculations are routine. As a consequence, the SN2ND solver was revised to incorporate a new multigrid preconditioner concept in addition to removing the remaining inappropriate spherical harmonics related quantities left over from its beginning (i.e. PN2ND). At the time of this report, the new version of SN2ND has not been completed, and the follow on work for SN2ND will continue to focus on updating the preconditioner as outlined in this report.
Keywords Computer models
Fast reactors
Fuel cycle
Nuclear reactors

Source Agency Technical Information Center Oak Ridge Tennessee
NTIS Subject Category 77H - Reactor Engineering & Nuclear Power Plants
46 - Physics
Corporate Author Argonne National Lab., IL. Nuclear Engineering Div.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1308
Contract Number DE-AC02-06CH113570

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