Analysis of the neutron response to axially-propagating perturbations in a heterogeneous lattice of cylindrical fuel elements via the two-group slowing-down model

Stimulated perturbation on the neutron flux distribution in the mutually-dependent source-to-absorber geometry

“…Also, in the geometry of work done by Elmaghraby et al [2], the cooling water of the target moderates the neutrons and reflects them back to the accelerator target. Finally, the geometry of the experiment carried out by Alabyad et al [3] where the physics of neutron production itself is influenced due to the existence of feedback through 7 Li(p, n) 7 Be which can absorb a thermal neutron and form 8 Be which decays to two helium atoms. All these remarks, which caused difficulties and interferences in the addresses measurements, can be explained as a stimulated perturbation of the neutron flux distribution in the mutually-dependent source-toabsorber pile.…”

“…One of the primary problems that have been encountered in the experimental measurement of flux perturbations is the determination of the unperturbed flux [1,[5][6][7]. During the last decade, a great deal of research effort (both theoretical and experimental) has been directed towards a better understanding of the spectral characteristics of in-core neutron-noise measurements in BWRs [8]. The main goal of such neutron noise analysis is to reach decisions concerning the behavior of the noise sources by studying the neutron [9].…”

“…The main goal of such neutron noise analysis is to reach decisions concerning the behavior of the noise sources by studying the neutron [9]. These research efforts (both theoretical and experimental) were initially reported by Seifritz [10] and [11], and studies become extensive in later work in [8,[12][13][14]. The thermal neutron flux perturbation factor is a significant source of error in the case of the absolute thermal neutron activation technique [15].…”

Stimulated perturbation on the neutron flux distribution in the mutually-dependent source-to-absorber geometry

“…Also, in the geometry of work done by Elmaghraby et al [2], the cooling water of the target moderates the neutrons and reflects them back to the accelerator target. Finally, the geometry of the experiment carried out by Al-Abyad et al [3] where the physics of neutron production itself is influenced due to the existence of feedback through 7 Li(p,n) 7 Be which can absorb a thermal neutron and form 8 Be which decays to two helium atoms. All these remarks, which caused difficulties and interferences in the addresses measurements, can be explained as a stimulated perturbation on the neutron flux distribution in the mutually-dependent source-to-absorber pile.…”

“…The main goal of such neutron noise analysis is to reach decisions concerning the behavior of the noise sources by studying the neutron [9]. These research efforts (both theoretical and experimental) were initially reported by Seifritz [10] and Seifritz and Cioli [11], studies becomes extensive in later work by Analytis [8], Laggiard et al [12], Antonopoulos-Domis and Housiadas [13], Yamamoto and Sakamoto [14]. The thermal neutron flux perturbation factor is a significant source of error in the case of the absolute thermal neutron activation technique [15].…”