Collision probability calculation in cluster lattices with square outer boundaries
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S. Q. Bogado Leite
Dr. Sergio Q. Bogado Leite, Comissão Nacional de Energia Nuclear, Coordenação de Reatores, Rua General Severiano, 90, Rio de Janeiro, RJ 22294-900, Brazil.
Abstract
The recently developed module PIJM for computing first-flight collision matrices in cluster geometry for the WIMS code, using an improved numerical technique in the in-plane integrations of the Bickley functions which considers each system region individually, has been extended to treat lattice cells with square outer boundaries. Comparisons with the standard square PIJ routine are presented for a test case, showing significant discrepancies among the results.
Abstract
Das kürzlich für den WIMS-Code entwickelte Modul PIJM zur Berechnung von ‘firstflight’-Stoßwahrscheinlichkeiten in Klustergeometrie, das ein verbessertes numerisches Verfahren bei der Integration der Bickley-Funktionen verwendet, unter individueller Betrachtung jedes einzelnen Systembereichs, wurde erweitert, um Gitterzellen mit quadratischen äußeren Grenzflächen behandeln zu können. Vergleiche mit der Standard-Quadrat PIJ-Routine werden für einen Testfall vorgestellt und zeigen signifikante Unterschiede bei den Ergebnissen.
About the author
Dr. Sergio Q. Bogado Leite, Comissão Nacional de Energia Nuclear, Coordenação de Reatores, Rua General Severiano, 90, Rio de Janeiro, RJ 22294-900, Brazil.
Acknowledgment
This work was supported in part by Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) of Brazil.
References
1 Bogado Leite, S. Q.: Improvements in Calculating Collision Probabilities in Cluster Geometry. Kerntechnik 65 (2000) 24510.1515/kern-2000-655-614Search in Google Scholar
2 Bogado Leite, S. Q.: Implementation of a New Routine for Computing Collision Matrices in the WIMS Code in Cluster Geometry. 12’th Meeting on Reactor Physics and Thermal Hydraulics (XII ENFIR), Rio de Janeiro, Brazil, Oct. 2000, CNEN-09-R01 (in Portuguese)Search in Google Scholar
3 Newmarch, D. A.: Errors Due to the Cylindrical Cell Approximation in Lattice Calculations. U.K. AEA Report AEEW-R 34 (1960)Search in Google Scholar
4 Halsall, M. J. : A Summary of WIMSD4 Input Options. Appendix E.U.K. AEA Report AEEW-M 1327 (1980)Search in Google Scholar
5 Anderson, D. W.: The WIMS ’E’ Module W-PIJ: A Two-Dimensional Collision Probability Code with General Boundary Conditions. U.K. AEA Report AEEW-R 862 (1973)Search in Google Scholar
© 2001 Carl Hanser Verlag, München
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Articles in the same Issue
- Contents
- Calendar of events
- Calendar of events • Veranstaltungskalender
- Summaries
- Summaries/Kurzfassungen
- Independent qualification of the CIAU tool based on the uncertainty estimate in the prediction of the LOBI test A1-93
- Books
- Beneficial Uses and Production of Isotopes
- Uncertainty and sensitivity analysis with respect to the hydrogen production determined by MELCOR 1.8.4 code during a severe accident
- Notes
- Note • Mitteilung
- Neutronic studies for the second Egyptian research reactor ET-RR-2
- Books • Bücher
- Collision probability calculation in cluster lattices with square outer boundaries
- Fission product isotope ratios as event characterization tools Part I: Particulate debris, isotopic activity ratios
- Books • Bücher
- Technical description of the radiological safety system for X-ray absorption spectroscopy experiments on radioactive samples at the Rossendorf Beamline
- Bücher • Books
- The calibration laboratories for the measurement of radon and short-lived radon decay products at the Federal Office for Radiation Protection (BfS)
- Requirements for quality assurance from the directive REI Mining and other regulations
- Technical Notes
- TOPFLOW – a new multipurpose thermalhydraulic test facility for the investigation of steady state and transient two phase flow phenomena
- Simulation of subcooled flow instability for high flux research reactors with ATHLET
- Notes
- Note • Mitteilung
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