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Improved calculation of flux shapes with the resonance shielding code NITAWL

Abstract

The shapes of the collision densities and the fluxes used in the resonance shielding calculations with the code NITAWL can be fully explained by the shapes of the cross-sections and the size of the slowing down range relative to the Nordheim integration interval. The way this Nordheim interval is chosen is liable to improvement but it is probably impossible to find an algorithm that satisfies every possible resonance. But the change from NITAWL in SCALE-3 to NITAWL in SCALE-4 shows an improvement. In addition the correction of the errors in solving the integral equation also improves the module NITAWL. (orig.)
Authors:
Publication Date:
Jan 01, 1993
Product Type:
Technical Report
Report Number:
ECN-I-93-003
Reference Number:
SCA: 210500; 220900; PA: NLN-94:0F3699; EDB-94:062818; SN: 94001179651
Resource Relation:
Other Information: PBD: Jan 1993
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; 22 GENERAL STUDIES OF NUCLEAR REACTORS; FAST REACTORS; NEUTRON FLUX; COMPUTER CALCULATIONS; CORRECTIONS; SELF-SHIELDING; CROSS SECTIONS; RESONANCE NEUTRONS; PLUTONIUM 240; NEUTRON SLOWING-DOWN THEORY; 210500; 220900; POWER REACTORS, BREEDING; REACTOR SAFETY
OSTI ID:
10142523
Research Organizations:
Netherlands Energy Research Foundation (ECN), Petten (Netherlands)
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Other: ON: DE94756098; CNN: Project Number ECN 1115.10; TRN: NL94F3699
Availability:
OSTI; NTIS
Submitting Site:
NLN
Size:
80 p.
Announcement Date:
Jul 05, 2005

Citation Formats

Oppe, J. Improved calculation of flux shapes with the resonance shielding code NITAWL. Netherlands: N. p., 1993. Web.
Oppe, J. Improved calculation of flux shapes with the resonance shielding code NITAWL. Netherlands.
Oppe, J. 1993. "Improved calculation of flux shapes with the resonance shielding code NITAWL." Netherlands.
@misc{etde_10142523,
title = {Improved calculation of flux shapes with the resonance shielding code NITAWL}
author = {Oppe, J}
abstractNote = {The shapes of the collision densities and the fluxes used in the resonance shielding calculations with the code NITAWL can be fully explained by the shapes of the cross-sections and the size of the slowing down range relative to the Nordheim integration interval. The way this Nordheim interval is chosen is liable to improvement but it is probably impossible to find an algorithm that satisfies every possible resonance. But the change from NITAWL in SCALE-3 to NITAWL in SCALE-4 shows an improvement. In addition the correction of the errors in solving the integral equation also improves the module NITAWL. (orig.)}
place = {Netherlands}
year = {1993}
month = {Jan}
}