skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Resonance treatment using pin-based pointwise energy slowing-down method

Abstract

A new resonance self-shielding method using a pointwise energy solution has been developed to overcome the drawbacks of the equivalence theory. The equivalence theory uses a crude resonance scattering source approximation, and assumes a spatially constant scattering source distribution inside a fuel pellet. These two assumptions cause a significant error, in that they overestimate the multi-group effective cross sections, especially for {sup 238}U. The new resonance self-shielding method solves pointwise energy slowing-down equations with a sub-divided fuel rod. The method adopts a shadowing effect correction factor and fictitious moderator material to model a realistic pointwise energy solution. The slowing-down solution is used to generate the multi-group cross section. With various light water reactor problems, it was demonstrated that the new resonance self-shielding method significantly improved accuracy in the reactor parameter calculation with no compromise in computation time, compared to the equivalence theory.

Authors:
 [1];  [2];  [1]
  1. Ulsan National Institute of Science and Technology, 50 UNIST-gil, Ulsan 44919 (Korea, Republic of)
  2. Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439 (United States)
Publication Date:
OSTI Identifier:
22622243
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Computational Physics; Journal Volume: 330; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCURACY; APPROXIMATIONS; COMPARATIVE EVALUATIONS; CORRECTIONS; CROSS SECTIONS; DISTRIBUTION; EQUATIONS; FUEL PELLETS; FUEL RODS; MATHEMATICAL SOLUTIONS; REACTOR PHYSICS; RESCATTERING; RESONANCE; RESONANCE SCATTERING; SELF-SHIELDING; SHADOW EFFECT; SLOWING-DOWN; URANIUM 238; WATER COOLED REACTORS; WATER MODERATED REACTORS

Citation Formats

Choi, Sooyoung, E-mail: csy0321@unist.ac.kr, Lee, Changho, E-mail: clee@anl.gov, and Lee, Deokjung, E-mail: deokjung@unist.ac.kr. Resonance treatment using pin-based pointwise energy slowing-down method. United States: N. p., 2017. Web. doi:10.1016/J.JCP.2016.11.007.
Choi, Sooyoung, E-mail: csy0321@unist.ac.kr, Lee, Changho, E-mail: clee@anl.gov, & Lee, Deokjung, E-mail: deokjung@unist.ac.kr. Resonance treatment using pin-based pointwise energy slowing-down method. United States. doi:10.1016/J.JCP.2016.11.007.
Choi, Sooyoung, E-mail: csy0321@unist.ac.kr, Lee, Changho, E-mail: clee@anl.gov, and Lee, Deokjung, E-mail: deokjung@unist.ac.kr. Wed . "Resonance treatment using pin-based pointwise energy slowing-down method". United States. doi:10.1016/J.JCP.2016.11.007.
@article{osti_22622243,
title = {Resonance treatment using pin-based pointwise energy slowing-down method},
author = {Choi, Sooyoung, E-mail: csy0321@unist.ac.kr and Lee, Changho, E-mail: clee@anl.gov and Lee, Deokjung, E-mail: deokjung@unist.ac.kr},
abstractNote = {A new resonance self-shielding method using a pointwise energy solution has been developed to overcome the drawbacks of the equivalence theory. The equivalence theory uses a crude resonance scattering source approximation, and assumes a spatially constant scattering source distribution inside a fuel pellet. These two assumptions cause a significant error, in that they overestimate the multi-group effective cross sections, especially for {sup 238}U. The new resonance self-shielding method solves pointwise energy slowing-down equations with a sub-divided fuel rod. The method adopts a shadowing effect correction factor and fictitious moderator material to model a realistic pointwise energy solution. The slowing-down solution is used to generate the multi-group cross section. With various light water reactor problems, it was demonstrated that the new resonance self-shielding method significantly improved accuracy in the reactor parameter calculation with no compromise in computation time, compared to the equivalence theory.},
doi = {10.1016/J.JCP.2016.11.007},
journal = {Journal of Computational Physics},
number = ,
volume = 330,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 2017},
month = {Wed Feb 01 00:00:00 EST 2017}
}