Subcritical nuclear systems and their stability against changes in the geometrical set-up
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J.-S. Wan
Abstract
A specific subcritical reactor system has been suggested and the stability of its parameters against small changes in the geometrical set-up has been estimated using the model calculation code DCM/CEM from Dubna. The dimensions of the system are 200 cm in diameter and 170 cm in length and it supplies a thermal power of 900 MW with keff =0.943, using a 20 mA proton beam of an energy of 1 GeV. Considering the thermal → electricity power and electricity → beam power conversion efficiencies, the electric power amplification is about 8. Energy deposition and neutron energy distribution in the fission core are also studied. Some properties, such as the heat production per unit volume, are rather similar to modern fast breeders. The neutron multiplication factor keff is very sensitive to small changes in the geometrical set-up within the fission core.
Abstract
Es wird ein spezielles unterkritisches System für eine Kernkraftwerksanlage vorgeschlagen. Die Stabilität dieses Systems gegen kleine Änderungen im geometrischen Aufbau wird mit Hilfe des Dubnaer Kaskaden Modells DCM/CEM in 1. Näherung untersucht. Die Dimensionen des Systems sind 200 cm für den Durchmesser und 170 cm für die Länge. Die thermische Leistung beträgt 900 MW bei keff =0.943 und unter Verwendung eines externen 1 GeV Protonenstrahles von 20 mA Stärke. Wenn man die Faktoren für die Konversion thermischer Energie in elektrische Energie, sowie elektrische Energie in Strahlleistung berücksichtigt, so hat dieses System eine Energie Verstärkung von 8. Die geometrische Verteilung der Energieproduktion wird ebenso abgeschätzt, wie die Neutronenenergieverteilung in der Spaltproduktzone des Kernkraftwerkes. Einige Parameter, wie die Wärmeproduktion im Einheitsvolumen, sind recht ähnlich wie in modernen Schnellen Brütern. Der Neutronenmultiplikationsfaktor keff ist sehr empfindlich gegenüber ganz geringen Veränderungen im geometrischen Aufbau der Spaltproduktzone.
Acknowledgements
The first author wants to thank the DAAD (Deutsche Akademische Austauschdienst) for granting a generous scholarship to him. This allowed him to work for a Dr. rer. nat. at the Philipps University in Marburg. This present work is part of the doctoral thesis [12] . In addition, he would like to thank Prof. Dr R. Odoj from the Research Center in Juelich for granting financial support to work at the Joint Institute for Nuclear Research in Dubna, Russia. Many thanks are also due to the coworkers of the Institute of Nuclear Chemistry in Marburg, as well as at the JINR in Dubna for the kind hospitality he could enjoy during his work at these two institutions.
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© 2001 Carl Hanser Verlag, München
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Articles in the same Issue
- Frontmatter
- Calendar of Events
- Calendar of Events • Veranstaltungskalender
- Summaries
- Summaries/Kurzfassungen
- Notes
- Richtlinie VDI 3783 Blatt 12. Umweltmeteorologie – Physikalische Modellierung von Strömungs- und Ausbreitungsvorgängen in der atmosphärischen Grenzschicht – Windkanalanwendungen; Hrsg.: VDI Verein Deutscher Ingenieure, Kommission Reinhaltung der Luft (KRdl im VDI und DIN-Normenausschuss), Dezember 2000; 107,60 DM
- Comparison of plant efficiencies of various power conversion systems for high-temperature reactor modules
- Studies on the behaviour of a passive containment cooling system for the Indian Advanced Heavy Water Reactor
- Detonation waves in melt-coolant interaction
- Experimental study of the transient characteristics of a natural circulation loop under SBLOCA
- Calculation of the higher order eigenvalues for a homogeneous sphere using the FN method
- Books
- Safe Management of the Operating Lifetimes of Nuclear Power Plants
- Study of the possibility of high accuracy flow measurements with the pulsed neutron activation method
- The astrophysical S-factor for dd-reactions at keV-energy range
- Books
- Books • Bücher
- Monte Carlo analysis of accelerator-driven systems: Studies on spallation neutron yield and energy gain
- Subcritical nuclear systems and their stability against changes in the geometrical set-up
- Technical Notes
- An energy amplifier fluidized bed nuclear reactor concept
- An attempt to describe the swelling of U3Si 2 fuel by a simple formula
- European Commission initiative to promote technical harmonisation on risk-based decision making
- Patent
- Notes
- Note • Mitteilung
