Serpent/SUBCHANFLOW pin-by-pin coupled transient calculations for a PWR minicore

Diego Ferraro (Corresponding Author), Manuel García, Ville Valtavirta, Uwe Imke, Riku Tuominen, Jaakko Leppänen, Victor Sanchez-Espinoza

Research output: Contribution to journalArticleScientificpeer-review

21 Citations (Scopus)


An increasing interest on the development of highly accurate methodologies in reactor physics has been observed during the last years. The McSAFE high-fidelity project has the objective of moving multiphysics schemes based on Monte Carlo (MC) neutronic calculations to become valuable tools for industry-like applications for LWRs for steady-state, burnup and transient calculations. This work deals with the transient calculation capabilities, developed here through the coupling between the Serpent 2 MC code and the subchannel code SUBCHANFLOW. This is done through a new versatile internal (master-slave) coupling, recently rewritten from scratch to include both codes inherent capabilities. To verify the implementation, a series of RIA-type transients scenarios are proposed and solved for a PWR minicore, considering a pin-by-pin level coupling. Global and detailed results are obtained and analyzed, verifying the consistency and showing the capabilities of the tool. Finally a raw estimation of resources requirements is presented and briefly discussed.

Original languageEnglish
Article number107090
JournalAnnals of Nuclear Energy
Publication statusPublished - Mar 2020
MoE publication typeA1 Journal article-refereed


  • Coupled transient calculations
  • High-fidelity multiphysics
  • Monte Carlo
  • Serpent 2


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