The problem of the effect of fissile lumps spatially appearing in a random fashion inside a fluid fuel reactor is addressed. The effect on reactivity is evaluated by means of first-order perturbation theory. The analysis is carried out in diffusion theory with the presence of delayed neutron emissions in one dimensional plane geometry. The estimation of the mean value and standard deviation of the reactivity inserted is performed by Monte Carlo simulations and a deterministic quadrature approach, to compare the methods in terms of computational effort and the accuracy of the results. The results presented show that the effects constitute an important issue in the assessment of these innovative systems.

Random Effects of Fissile Lumps in Molten Salt Reactors / Dulla, Sandra; Ravetto, Piero; A. K., Prinja. - ELETTRONICO. - (2013). (Intervento presentato al convegno International Conference on Mathematics and Computational Methods Applied to Nuclear Science a nd Engineering (M&C 2013) tenutosi a Sun Valley, ID nel May 5-9 2013).

Random Effects of Fissile Lumps in Molten Salt Reactors

DULLA, SANDRA;RAVETTO, PIERO;
2013

Abstract

The problem of the effect of fissile lumps spatially appearing in a random fashion inside a fluid fuel reactor is addressed. The effect on reactivity is evaluated by means of first-order perturbation theory. The analysis is carried out in diffusion theory with the presence of delayed neutron emissions in one dimensional plane geometry. The estimation of the mean value and standard deviation of the reactivity inserted is performed by Monte Carlo simulations and a deterministic quadrature approach, to compare the methods in terms of computational effort and the accuracy of the results. The results presented show that the effects constitute an important issue in the assessment of these innovative systems.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2507675
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