Nuclear Research & Consultancy Group (NRG) develops and provides sustainable 
nuclear technology for energy, environment, and health. NRG offers a wide range 
of services to energy utilities, government organizations and various branches 
of industry - including the nuclear, financial services and medical sectors. 
NRG is a major producer of medical isotopes in Europe.
Within our department Safety and Power, we are currently seeking for a  

MSc THESIS STUDENT:  CFD - THERMAL MIXING

Your responsibilities:
CFD predictions of the turbulent mixing processes that take place in the 
cooling system of nuclear reactors used for electricity production need 
improvement. In that respect, CFD predictions of the flow and heat transport in 
nuclear fuel bundles, pebble bed reactor cores, and in T-junction type 
configurations have gained a lot of interest. Better prediction of the flow and 
heat transport in the considered configurations will contribute to an improved 
design, safety, and operation of nuclear reactors. In relation to this, you 
will execute a MSc thesis project on: 
1)	Learning the Nek5000 CFD solver. Nek5000 is an open-source high 
fidelity CFD solver based on the spectral element method and is actively 
developed at the Mathematics and Computer Science Division of Argonne National 
Laboratory
2)	Further validation of NEK5000 for selected basic turbulent flows 
configurations with heat transfer
3)	Application of NEK5000 in order to predict the flow and heat transport 
in one of the considered nuclear applications, e.g. a T-junction type geometry
                        

Your profile:
•	MSc student in applied science, with specialization in computational 
fluid mechanics
•	Good knowledge of turbulence modelling and numerical methods
•	Required computer experience: Linux, Windows, Fortran 77 and / or C
•	Fluency in written and spoken English
•	Good analytical and problem solving skills
•	Dedicated, good communication and social skills

Our offer:
•	A challenging thesis project to be executed within a successful team 
with an informal atmosphere and an excellent reputation
•	Strong support from enthusiastic members of the CFD team 
•	Monthly allowance/stipend
•	Housing and transportation for the period of stay

Information and applications:
Would you wish to know more about the opportunity? Then, contact Ed Komen 
(komen@nrg.eu). You can send your application to:
Ed Komen  • NRG Petten • The Netherlands • www.nrg.eu • komen@nrg.eu