The Numerical Multi-Physics project (NUMPS) at VTT Technical Research Centre of Finland

Jaakko Leppänen, Ville Hovi, Timo Ikonen, Joona Kurki, Maria Pusa, Ville Valtavirta, Tuomas Viitanen

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)


The four-year Numerical Multi-Physics (NUMPS) project funded by the Academy of Finland was initiated at VTT Technical Research Centre of Finland in September 2012, for the purpose of studying and developing high-fidelity computational methods for nuclear reactor analysis. The project is built around calculation codes developed at VTT, and it aims at the coupled three-dimensional modeling of neutronics, thermal hydraulics and fuel behavior of nuclear reactors. The work involves the continuous-energy Monte Carlo code Serpent and CFD code PORFLO, together with two light-weight solvers, COSY and FINIX, coupled to Serpent at source code level. This paper is a review on the current status and development activities, reflecting the status of the NUMPS project at the beginning of its second complete year.

Original languageEnglish
Pages (from-to)55-62
Number of pages8
JournalAnnals of Nuclear Energy
Publication statusPublished - 28 Jul 2015
MoE publication typeA1 Journal article-refereed


  • CFD
  • Monte Carlo
  • Multi-physics
  • Serpent

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