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Title: Time-step selection considerations in the analysis of reactor transients with DIF3D-K

Abstract

The DIF3D-K code solves the three-dimensional, time-dependent multigroup neutron diffusion equations by using a nodal approach for spatial discretization and either the theta method or one of three space-time factorization approaches for temporal integration of the nodal equations. The three space-time factorization options (namely, improved quasistatic, adiabatic and conventional point kinetics) were implemented because of their potential efficiency advantage for the analysis of transients in which the flux shape changes more slowly than its amplitude. Here we describe the implementation of DIF3D-K as the neutronics module within the SAS-HWR accident analysis code. We also describe the neutronics-related time step selection algorithms and their influence on the accuracy and efficiency of the various solution options.

Authors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab., IL (United States). Reactor Analysis Div.
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10159335
Report Number(s):
ANL/RA/CP-78587; CONF-930601-15
ON: DE93012889; TRN: 93:016359
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: American Nuclear Society (ANS) annual meeting,San Diego, CA (United States),20-24 Jun 1993; Other Information: PBD: [1993]
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; REACTOR PHYSICS; D CODES; TRANSIENTS; REACTOR ACCIDENTS; REACTOR SAFETY; HEAT TRANSFER; HYDRAULICS; COMPUTER CALCULATIONS; ALGORITHMS; NEUTRON FLUX; 220100; 990200; 220900; THEORY AND CALCULATION; MATHEMATICS AND COMPUTERS

Citation Formats

Taiwo, T A, Khalil, H S, Cahalan, J E, and Morris, E E. Time-step selection considerations in the analysis of reactor transients with DIF3D-K. United States: N. p., 1993. Web.
Taiwo, T A, Khalil, H S, Cahalan, J E, & Morris, E E. Time-step selection considerations in the analysis of reactor transients with DIF3D-K. United States.
Taiwo, T A, Khalil, H S, Cahalan, J E, and Morris, E E. 1993. "Time-step selection considerations in the analysis of reactor transients with DIF3D-K". United States. https://www.osti.gov/servlets/purl/10159335.
@article{osti_10159335,
title = {Time-step selection considerations in the analysis of reactor transients with DIF3D-K},
author = {Taiwo, T A and Khalil, H S and Cahalan, J E and Morris, E E},
abstractNote = {The DIF3D-K code solves the three-dimensional, time-dependent multigroup neutron diffusion equations by using a nodal approach for spatial discretization and either the theta method or one of three space-time factorization approaches for temporal integration of the nodal equations. The three space-time factorization options (namely, improved quasistatic, adiabatic and conventional point kinetics) were implemented because of their potential efficiency advantage for the analysis of transients in which the flux shape changes more slowly than its amplitude. Here we describe the implementation of DIF3D-K as the neutronics module within the SAS-HWR accident analysis code. We also describe the neutronics-related time step selection algorithms and their influence on the accuracy and efficiency of the various solution options.},
doi = {},
url = {https://www.osti.gov/biblio/10159335}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat May 01 00:00:00 EDT 1993},
month = {Sat May 01 00:00:00 EDT 1993}
}

Conference:
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