Hybrid-transport point kinetics for initially-critical multiplying systems

Paolo Picca, Roberto Furfaro

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


The paper presents an extension of the Hybrid Transport Point Kinetic (HTPK) model to initially-critical multiplying structures, i.e. in a source-free medium with transients starting from the equilibrium between neutron distribution and precursor concentrations. The mathematical model behind the HTPK methodology is derived from the detailed time-dependent balance equations and with reference to the limiting cases (i.e., point model and multi-collision models). Numerical simulations of transient systems demonstrate the interesting features of HTPK, which is shown to sensibly increase the accuracy of classical point kinetics models even at low truncation orders.

Original languageEnglish (US)
Pages (from-to)232-243
Number of pages12
JournalProgress in Nuclear Energy
StatePublished - Sep 2014


  • Critical systems
  • Hybrid model
  • Multi-collisions
  • Point kinetics
  • Reactor kinetics

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Safety, Risk, Reliability and Quality
  • Energy Engineering and Power Technology
  • Waste Management and Disposal


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