Single-phase and multi-phase CFD simulations with a focus on validation will be welcome in areas such as: single-phase and multi-phase heat transfer, free-surface flows, direct contact condensation, and turbulent mixing. These should relate to NPP-relevant safety issues, such as pressurized thermal shock, critical heat flux, pool heat exchangers, boron dilution, hydrogen distribution in containments, thermal striping and fatigue, and/or advanced design concepts, such as tight-lattice fuel configurations, passive safety options, design optimization, etc. The use of systematic error quantification and the application of Best Practice Guidelines (BPGs) will be severely scrutinized in the paper review process. Some discussion of Uncertainty Quantification (UQ) is also encouraged.

At the discretion of the reviewers, provision will be made for some papers to be presented as posters rather than orally. Full papers will still be expected; these will then be included in the official proceedings. This procedure will be followed to ensure that high quality papers, though ones not reflecting the major themes of the Workshop, are properly acknowledged.

A dedicated poster session will also be arranged for participants in the OECD-PSI Benchmark to display their results. To avoid duplicity, a written paper will not be required in this case.

Each technical session at CFD4NRS-6 will be preceded by a keynote lecture, given by an internationally recognised expert. In addition, an integral part of the workshop will be to report results of the OECD-PSI International Benchmark on Flow mixing with uncertainty quantification, which is based on an experiment recently carried out in the GEMIX facility at the Paul Scherrer Institute, Switzerland. The first invited lecture will provide a synthesis of results from this exercise.

The reception is designed to highlight specific topics and interests, as participants come together for hors d'oeurve and networking opportunities.