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Title: Weighted delta-tracking in scattering media

Abstract

Here in this work, we expand the weighted delta-tracking routine to include a treatment for scattering. The weighted delta-tracking routine adds survival biasing to normal delta-tracking, improving problem figure of merit. In the original formulation of this method, only absorption events were considered. We have expanded the method to include scattering and investigated the method's effectiveness with two test cases: a pressurized water reactor pin cell and a fast reactor pin cell. We compare the figure of merit for calculating infinite flux and total cross-section while incrementally changing the amount of weighted delta-tracking used. We find that this new weighted delta-tracking (WDT) routine has strong potential to improve the efficiency of fast reactor calculations, and may be useful for light water reactor calculations.

Authors:
 [1];  [2];  [3];  [1]
  1. Univ. of California, Berkeley, CA (United States)
  2. Idaho State Univ., Pocatello, ID (United States); Idaho National Lab. (INL), Idaho Falls, ID (United States)
  3. Idaho National Lab. (INL), Idaho Falls, ID (United States)
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC); USNRC
OSTI Identifier:
1499638
Alternate Identifier(s):
OSTI ID: 1605228
Report Number(s):
INL/JOU-17-43607-Rev000
Journal ID: ISSN 0029-5493
Grant/Contract Number:  
AC07-05ID14517; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Engineering and Design
Additional Journal Information:
Journal Volume: 342; Journal Issue: C; Journal ID: ISSN 0029-5493
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
97 - MATHEMATICS AND COMPUTING; Monte Carlo; Serpent; Delta-tracking; Weighted; Neutron transport; Weighted delta-tracking

Citation Formats

Rehak, J. S., Kerby, L. M., DeHart, M. D., and Slaybaugh, R. N. Weighted delta-tracking in scattering media. United States: N. p., 2018. Web. https://doi.org/10.1016/j.nucengdes.2018.12.006.
Rehak, J. S., Kerby, L. M., DeHart, M. D., & Slaybaugh, R. N. Weighted delta-tracking in scattering media. United States. https://doi.org/10.1016/j.nucengdes.2018.12.006
Rehak, J. S., Kerby, L. M., DeHart, M. D., and Slaybaugh, R. N. Mon . "Weighted delta-tracking in scattering media". United States. https://doi.org/10.1016/j.nucengdes.2018.12.006. https://www.osti.gov/servlets/purl/1499638.
@article{osti_1499638,
title = {Weighted delta-tracking in scattering media},
author = {Rehak, J. S. and Kerby, L. M. and DeHart, M. D. and Slaybaugh, R. N.},
abstractNote = {Here in this work, we expand the weighted delta-tracking routine to include a treatment for scattering. The weighted delta-tracking routine adds survival biasing to normal delta-tracking, improving problem figure of merit. In the original formulation of this method, only absorption events were considered. We have expanded the method to include scattering and investigated the method's effectiveness with two test cases: a pressurized water reactor pin cell and a fast reactor pin cell. We compare the figure of merit for calculating infinite flux and total cross-section while incrementally changing the amount of weighted delta-tracking used. We find that this new weighted delta-tracking (WDT) routine has strong potential to improve the efficiency of fast reactor calculations, and may be useful for light water reactor calculations.},
doi = {10.1016/j.nucengdes.2018.12.006},
journal = {Nuclear Engineering and Design},
number = C,
volume = 342,
place = {United States},
year = {2018},
month = {12}
}

Journal Article:
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