P4: Nuclear Research and Consultancy Group (NRG)


NRG is the nuclear centre of competence in the Netherlands. NRG was established in 1998 through the merger of ECN’s and KEMA’s nuclear science and technology activities. NRG is an internationally operating company with a staff of more than 320 persons which develops knowledge, processes and products for safe applications of nuclear technology in energy, environment and health. This includes products, services and technologies for safe and economic operation of existing nuclear power plants and future sustainable nuclear energy systems. NRG is also a service provider for non-nuclear businesses like the chemical, oil and gas industry and the medical sectors. NRG has a complete set of nuclear facilities like a 45 MW research reactor (the HFR), hot-cell labs (HCL), laboratories for research and analyses, decontamination facilities and the radio-isotope production facilities. NRG is registered to the quality assurance standard ISO-9001 for its nuclear research, as well as development and services in the field of nuclear energy

In 1992 NRG started a national programme on the transmutation of actinides. NRG gained a large experience in this research area thanks to the irradiation experiments performed on fuels and transmutation targets, such as the irradiations Project-IPSF, FUJI1-8, Thorium, Micromox and the EFTTRA-series of experiments (e.g. EFTTRAT4/T4bis). Currently post-irradiation examination activities are ongoing for the experiments HELIOS and CONFIRM, while the MARIOS and SPHERE experiments are in preparation. The latter two experiments focus on the transmutation of americium in sodium-cooled fast reactors.

Another major research programme of NRG focuses on the 4th generation nuclear systems. Within the 4th generation nuclear systems, NRG puts focus on three reactor systems:

  • the existing Light Water Reactors and their 4th generation successor the Supercritical Water Reactor (SCWR).
  • the High Temperature Reactor (HTR) and its 4th generation successor the Very High Temperature Reactor (VHTR).
  • fast reactor systems (SFR, LFR, and GFR).

Research activities for other systems are also employed at NRG if these activities have a cross-cutting character. These subjects are in line with the vision of the EU presented in the Sustainable Nuclear Energy Technology Platform (SNE-TP) Vision Report. Furthermore, NRG is involved in many European projects, both as coordinator and as participant.

Key persons involved in the project:

Ferry Roelofs is a senior consultant at NRG. He has been working on thermal-hydraulics, heat transfer and free surface modelling for most types of innovative nuclear reactors for over 10 years. He acted as work package coordinator of the work package related to “Advanced thermal-hydraulics and measurement techniques” in the EUROTRANS project. Currently, he coordinates the ‘single phase turbulence work package’ in the THINS project. Mr Roelofs holds an M.Sc. in Mechanical Engineering from Eindhoven Technical University.

Ed Komen is team leader of the CFD section of the Safety & Performance group at NRG. He has almost 20 years of experience in the numerical modelling of fluid flow, heat, and mass transfer, using thermal-hydraulic system codes as well as CFD codes. Mr. Komen is specialized in modelling of turbulence, using RANS as well as LES, two-phase flows, and combustion. Mr. Komen holds an M.Sc. (Cum Laude) in Applied Mathematics at the Delft Technical University

Dr. Ralph Hania has a PhD in experimental physical chemistry from the University of Groningen, with experience in laser spectroscopy and microscopy as well as application of kinetic and thermodynamic models. He currently works at NRG on fuel-metal interactions within the European F-Bridge project, and on several fuel irradiation programmes and post-irradiation examination experiments. In addition, Hania administrates a thermo-chemical database describing nuclear fuels and fission products developed at NRG.