You need JavaScript to view this

Multiband discrete ordinates method: formalism and results; Methode multibande aux ordonnees discretes: formalisme et resultats

Abstract

The multigroup discrete ordinates method is a classical way to solve transport equation (Boltzmann) for neutral particles. Self-shielding effects are not correctly treated due to large variations of cross sections in a group (in the resonance range). To treat the resonance domain, the multiband method is introduced. The main idea is to divide the cross section domain into bands. We obtain the multiband parameters using the moment method; the code CALENDF provides probability tables for these parameters. We present our implementation in an existing discrete ordinates code: SN1D. We study deep penetration benchmarks and show the improvement of the method in the treatment of self-shielding effects. (author) 15 refs.
Authors:
Publication Date:
Jun 01, 1998
Product Type:
Technical Report
Report Number:
CEA-N-2832
Reference Number:
SCA: 220100; 220200; PA: AIX-30:028257; EDB-99:065551; SN: 99002108752
Resource Relation:
Other Information: DN: 15 refs.; PBD: Jun 1998
Subject:
22 NUCLEAR REACTOR TECHNOLOGY; BOLTZMANN EQUATION; BOUNDARY CONDITIONS; COMPUTERIZED SIMULATION; GROUP CONSTANTS; MULTIGROUP THEORY; NEUTRAL-PARTICLE TRANSPORT; PERFORMANCE TESTING; PROBABILITY; SELF-SHIELDING; T CODES
OSTI ID:
354216
Research Organizations:
CEA Saclay, 91 - Gif-sur-Yvette (France). Dept. de Mecanique et de Technologie
Country of Origin:
France
Language:
French
Other Identifying Numbers:
Other: ON: DE99624859; TRN: FR9900286028257
Availability:
INIS; OSTI as DE99624859
Submitting Site:
FRN
Size:
64 p.
Announcement Date:

Citation Formats

Luneville, L. Multiband discrete ordinates method: formalism and results; Methode multibande aux ordonnees discretes: formalisme et resultats. France: N. p., 1998. Web.
Luneville, L. Multiband discrete ordinates method: formalism and results; Methode multibande aux ordonnees discretes: formalisme et resultats. France.
Luneville, L. 1998. "Multiband discrete ordinates method: formalism and results; Methode multibande aux ordonnees discretes: formalisme et resultats." France.
@misc{etde_354216,
title = {Multiband discrete ordinates method: formalism and results; Methode multibande aux ordonnees discretes: formalisme et resultats}
author = {Luneville, L}
abstractNote = {The multigroup discrete ordinates method is a classical way to solve transport equation (Boltzmann) for neutral particles. Self-shielding effects are not correctly treated due to large variations of cross sections in a group (in the resonance range). To treat the resonance domain, the multiband method is introduced. The main idea is to divide the cross section domain into bands. We obtain the multiband parameters using the moment method; the code CALENDF provides probability tables for these parameters. We present our implementation in an existing discrete ordinates code: SN1D. We study deep penetration benchmarks and show the improvement of the method in the treatment of self-shielding effects. (author) 15 refs.}
place = {France}
year = {1998}
month = {Jun}
}