An assessment of prompt neutron reproduction time in a reflector dominated fast critical system: ELECTRA
2014 (English)In: Annals of Nuclear Energy, ISSN 0306-4549, E-ISSN 1873-2100, Vol. 71, 159-165 p.Article in journal (Refereed) Published
In this paper, an accurate method to evaluate the prompt neutron reproduction time for a reflector dominated fast critical reactor, ELECTRA, is discussed. To adequately handle the problem, explicit time dependent Monte Carlo calculations with MCNP, applying repeated time cut-off technique, is used and compared against the σ ∼ 1/v time dependent absorber method, applying artificial cross section data in the Monte Carlo code SERPENT. The results show that when a reflector plays a major role in criticality for fast neutron reactor, the two methods predict different physical parameters (Λ = 69 ± 2 ns and Λ = 83 ± 1 ns for time cut-off and the 1/v method respectively). The reason is explained by applying Avery-Cohn’s two-region prompt neutron model.
Place, publisher, year, edition, pages
2014. Vol. 71, 159-165 p.
Prompt neutron reproduction time, Reflector dominated critical system
Other Physics Topics
IdentifiersURN: urn:nbn:se:kth:diva-146988DOI: 10.1016/j.anucene.2014.04.001ISI: 000337985500018ScopusID: 2-s2.0-84899442089OAI: oai:DiVA.org:kth-146988DiVA: diva2:727132
QC 201406252014-06-192014-06-192014-08-06Bibliographically approved