Reactivity monitoring of the accelerator driven VENUS-F subcritical reactor with the ‘‘current-to-flux” method

Research output: Contribution to journalArticlepeer-review


Institutes & Expert groups

  • LPC - Laboratoire de Physique Corpusculaire de Caen
  • CNRS/IN2P3 - Université Grenoble Alpes - LPSC
  • IPN - Institute de Physique Nucléaire
  • CEA Cadarache - Commissariat à l'Énergie Atomique

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In this article, we evaluate the quality and robustness of a method envisaged for the on-line monitoring of the subcriticality of an ADS, called the ‘‘current-to flux” (CTF) method. For this evaluation, we performed a dedicated experiment at the GUINEVERE facility. It is hosted at the SCK-CEN and consists of the subcritical VENUS-F reactor coupled to a continuous external neutron source provided by the GENEPI-3C accelerator. During this experiment, the reactor control rods were moved in various patterns, and the subsequent dynamical evolutions of the reactor reactivity were monitored using nine fission chambers (FCs). The space-energy effects that bias the reactivity values are corrected using a procedure based on simulations computed with the Monte Carlo neutron transport code MCNP. We investigate the precision of this correction procedure by comparison with a reactivity value extracted with the beam interruption technique and we demonstrate its insensitivity to the simplifications made on the VENUS-F reactor modeling and to a simulation key parameter such as the boron carbide density filling the control rods.


Original languageEnglish
Pages (from-to)12-23
JournalAnnals of nuclear energy
Publication statusPublished - 3 Jan 2019


  • Reactivity monitoring, VENUS-F, MYRRHA, current-to-flux, subcritical, ADS, MCNP, control rods

ID: 4788066