Estimation of errors in the cumulative Monte Carlo fission source
2014 (English)In: Annals of Nuclear Energy, ISSN 0306-4549, E-ISSN 1873-2100, Vol. 72, 151-155 p.Article in journal (Refereed) Published
We study the feasibility of estimating the error in the cumulative fission source in Monte Carlo criticality calculations by utilising the fundamental-mode eigenvector of the fission matrix. The cumulative fission source, representing the source combined over active cycles, contains errors of both statistical and systematic nature. Knowledge of the error in the cumulative fission source is crucial as it determines the accuracy of computed neutron flux and power distributions. While statistical errors are present in the eigenvector of the fission matrix, it appears that these are not (or they are only weakly) correlated to the errors in the cumulative fission source. This ensures the suggested methodology gives error estimates that are distributed around the real errors, which is also supported by results of our numerical test calculations.
Place, publisher, year, edition, pages
2014. Vol. 72, 151-155 p.
Monte Carlo criticality, Fission source, Cumulative, Convergence, Error, Bias
Other Physics Topics
IdentifiersURN: urn:nbn:se:kth:diva-150895DOI: 10.1016/j.anucene.2014.05.003ISI: 000340314000017ScopusID: 2-s2.0-84901913487OAI: oai:DiVA.org:kth-150895DiVA: diva2:746831
FunderEU, FP7, Seventh Framework Programme, 295971
QC 201409152014-09-152014-09-112014-09-15Bibliographically approved