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Licensed Unlicensed Requires Authentication Published by De Gruyter August 31, 2018

Investigation of fuel cycles containing Generation IV reactors and VVER-1200 reactors

Untersuchung von Brennstoffkreisläufen für Reaktoren der Generation IV und WWER-1200
M. Halász and M. Szieberth
From the journal Kerntechnik

Abstract

Gen-IV fast reactors are envisaged to operate in closed fuel cycles due to their ability to breed their fuel from fertile feed and burn minor actinides produced by themselves or thermal reactors in the nuclear park. The optimization of such fuel cycle strategies requires detailed models, capable of simulating the transition from initial state to equilibrium. A fast and flexible burn-up scheme based on polynomial fitting of the one-group cross-sections, FITXS was used to develop burn-up models for the Gen-IV Gas-cooled Fast Reactor (GFR), Lead-cooled Fast Reactor (LFR) and Sodium-cooled Fast Reactor (SFR), as well as a European Pressurized Reactor (EPR) and a VVER-1200 MOX fuel assembly. The burn-up models were integrated in a closed fuel cycle model containing Gen-IV LFR and MOX fueled VVER-1200 reactors, and different scenarios were investigated and compared concerning the reduction of transuranium inventories and the stabilization of the plutonium inventory. Results show that the LFR is capable of burning minor actinides from spent VVER-440 fuel and that transuranium inventories can be stabilized or reduced with a mixed fleet of LFR and MOX fueled VVER-1200 reactors.

Kurzfassung

Schnelle Reaktoren der Generation IV sind für den Betrieb mit geschlossenen Brennstoffkreisläufen vorgesehen, da sie in der Lage sind, ihren Brennstoff selbst zu erbrüten und selbst oder durch andere thermische Reaktoren produzierte minore Aktinide zu verbrennen. Die Optimierung solcher Brennstoffkreislaufstrategien erfordert detaillierte Berechnungsmodelle, die den Übergang vom Ausgangszustand zum Gleichgewicht simulieren können. FITXS ist ein schnelles und flexibles Berechnungsverfahren zur Bestimmung des Abbrands, das auf der polynomialen Anpassung der Ein-Gruppen-Querschnitte basiert. Mit FITXS wurden Abbrandmodelle für den gasgekühlten Gen-IV Fast Reactor (GFR), den bleigekühlten Fast Reactor (LFR) und den natriumgekühlten Fast Reactor (SFR) sowie einen European Pressurized Reactor (EPR) und ein WWER-1200 MOX-Brennelement entwickelt. Die Abbrandmodelle wurden in geschlossene Brennstoffkreislaufmodelle mit Gen-IV LFR- und MOX-betriebenen WWER-1200-Reaktoren integriert und verschiedene Szenarien hinsichtlich der Reduktion von Transuran-Beständen und der Stabilisierung des Plutonium-Bestands untersucht und verglichen. Die Ergebnisse zeigen, dass der LFR in der Lage ist, kleinere Aktinide aus verbrauchtem VVER-440 Brennstoff zu verbrennen und dass Transuranbestände mit einer gemischten Flotte von mit LFR und MOX betriebenen VVER-1200 Reaktoren stabilisiert oder reduziert werden können.


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Received: 2018-01-30
Published Online: 2018-08-31
Published in Print: 2018-08-27

© 2018, Carl Hanser Verlag, München