In this document are pointed out the principal results of a neutronic study, focused to the 'better use' of some Minor Actinides (MA) fuel solutions at the 'maximization' purpose of 'incineration' rate. The incineration rate is intended as burning and/or transmutation rate of the MA themselves into other isotopes of reduced radio-toxicity. It is a preliminary physics study, starting from MA fuel compositions coming from pyrometallurgic (electrochemical) process and oriented to the use of a sub critical reactor, of the liquid metal ADS family, as reference reactor in the frame of the prevalent idea to assure high neutron fluxes. However the obtained results show a realization's difficulty of such a reactor concept owing to a not negligible worsening of the safety aspects and performances. Besides this, the increase of the reactivity during the life, transforming the sub critical reactor in a (over) critical reactor, requires the introduction of control systems (like control rods) extraneous to the sub critical reactor concept.

Minor Actinides Fuel Neutron Performances

Glinatsis, G.
2004

Abstract

In this document are pointed out the principal results of a neutronic study, focused to the 'better use' of some Minor Actinides (MA) fuel solutions at the 'maximization' purpose of 'incineration' rate. The incineration rate is intended as burning and/or transmutation rate of the MA themselves into other isotopes of reduced radio-toxicity. It is a preliminary physics study, starting from MA fuel compositions coming from pyrometallurgic (electrochemical) process and oriented to the use of a sub critical reactor, of the liquid metal ADS family, as reference reactor in the frame of the prevalent idea to assure high neutron fluxes. However the obtained results show a realization's difficulty of such a reactor concept owing to a not negligible worsening of the safety aspects and performances. Besides this, the increase of the reactivity during the life, transforming the sub critical reactor in a (over) critical reactor, requires the introduction of control systems (like control rods) extraneous to the sub critical reactor concept.
Rapporto tecnico;Reattori sottocritici/ADS;Neutronica;Metodi Montecarlo;Metodi deterministici per la neutronica
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12079/7028
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