A hybrid transport-point kinetic method for the analysis of source transients in subcritical systems

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The paper describes a novel technique for approximating the time-dependent neutron transport equation in the simulation of source-driven transients. The methodology, based on a physical intuition, adopts a multi-generational approach to improve the accuracy of lumped parameter approximations and better account for the propagation effects typical of a source switch-on. More precisely, the first few neutron generations are simulated collision by collision through the Boltzmann equation while a simplified lumped parameter model is adopted for the multiply collided neutrons. Numerical simulations prove that a significant gain in accuracy is obtained compared to classical point kinetics, especially for detector signal analysis. In terms of computational costs, the technique is more time consuming than point kinetics but, at low orders, remains sensibly faster than fulll time dependent transport solution or quasi-static approximations.

Original languageEnglish (US)
Title of host publicationInternational Conference on the Physics of Reactors 2010, PHYSOR 2010
Pages387-396
Number of pages10
StatePublished - Dec 1 2010
EventInternational Conference on the Physics of Reactors 2010, PHYSOR 2010 - Pittsburgh, PA, United States
Duration: May 9 2010May 14 2010

Publication series

NameInternational Conference on the Physics of Reactors 2010, PHYSOR 2010
Volume1

Other

OtherInternational Conference on the Physics of Reactors 2010, PHYSOR 2010
CountryUnited States
CityPittsburgh, PA
Period5/9/105/14/10

Keywords

  • Accelerator-driven systems
  • Point kinetics
  • Time-dependent transport theory

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Nuclear and High Energy Physics

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  • Cite this

    Picca, P., Ganapol, B. D., & Furfaro, R. (2010). A hybrid transport-point kinetic method for the analysis of source transients in subcritical systems. In International Conference on the Physics of Reactors 2010, PHYSOR 2010 (pp. 387-396). (International Conference on the Physics of Reactors 2010, PHYSOR 2010; Vol. 1).