An alternative pseudo-harmonics method: A strong solution-based formulation of the standard and modified versions

• Published in: Annals of nuclear energy Vol. 16; no. 5; pp. 213 - 229
• Main Authors: de Abreu, M.P., Thomé, Z.D., Alvim, A.C.M.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 1989
• ISSN: 0306-4549; 1873-2100
• DOI: 10.1016/0306-4549(89)90088-1

An alternative to the pseudo-harmonics method for perturbed neutron flux reconstruction is presented together with a number of applications relevant to a one-energy group, 2-D fast reactor model. Global and intense localized perturbations were simulated. Previous versions of the pseudo-harmonics method have presented serious convergence problems when applied to 2-D reactor models in the case of very intense localized perturbations. The alternative described in this work was able to overcome these problems and is thus considered to be a powerful tool for dealing with intense 2-D perturbations in nuclear reactor problems.