Investigation of the space-dependent noise induced by propagating perturbations
Artikel i vetenskaplig tidskrift, 2010

The space-dependent behaviour of the neutron noise, induced by perturbations represented by the fluctuations of the absorption cross sections, propagating with the coolant of a PWR, is investigated in a one-dimensional one-group approach. The general space–frequency dependent problem is solved for this specific noise source with the help of the Green’s function technique. All calculations are made in the frame of first-order perturbation theory. The solution is investigated for different frequencies and system sizes. The limits of point kinetic and space-dependent behaviour were investigated. An interesting interference phenomenon was found between the point kinetic and the pure space dependent components of the noise for certain domains of the frequency and system size. The results bear some significance for the dynamics of Molten Salt Reactors (MSR), which is reported on in a companion paper.

Propagating perturbations

Space-dependent noise

Point kinetics

Neutron noise


Imre Pazsit

Chalmers, Teknisk fysik, Nukleär teknik

Victor Dykin

Chalmers, Teknisk fysik, Nukleär teknik

Annals of Nuclear Energy

0306-4549 (ISSN) 1873-2100 (eISSN)

Vol. 37 10 1329-1340


Subatomär fysik

Övrig annan teknik

Annan fysik



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