In this paper, a comparison of the main core safety parameters for equilibrium thorium and uranium cycles in a Lead Fast Reactor (ELSY – European Lead SYstem) is performed. For completeness, also a thorium-plutonium core is analyzed because it represents a possible starting point for a thorium cycle. An insight is provided into the phenomenology underlying Doppler effect and void reactivity using reactivity decomposition techniques based on neutron balance, including some recent methodological developments. The role of each isotope is singled out, and the relation is found between the reactivity effects and the underlying nuclear data. This is thought to provide tools for the design and optimization of thorium- and uranium-fuelled fast reactors, as well as to shed light on the safety parameter values obtained through core physics codes.

Analysis of Void Reactivity and Doppler Coefficient for Thorium- And Uranium-Fuelled Lead Fast Reactors

FIORINA, CARLO;CAMMI, ANTONIO;RICOTTI, MARCO ENRICO;
2013

Abstract

In this paper, a comparison of the main core safety parameters for equilibrium thorium and uranium cycles in a Lead Fast Reactor (ELSY – European Lead SYstem) is performed. For completeness, also a thorium-plutonium core is analyzed because it represents a possible starting point for a thorium cycle. An insight is provided into the phenomenology underlying Doppler effect and void reactivity using reactivity decomposition techniques based on neutron balance, including some recent methodological developments. The role of each isotope is singled out, and the relation is found between the reactivity effects and the underlying nuclear data. This is thought to provide tools for the design and optimization of thorium- and uranium-fuelled fast reactors, as well as to shed light on the safety parameter values obtained through core physics codes.
ICAPP 2013 Proceedings
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11311/765386
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