The Workshop on Experimental Validation and Application of CFD and CMFD Codes to Nuclear Reactor Safety Issues, CFD4NRS-7 was the seventh in a series of workshops focusing on Computational Fluid Dynamics for Nuclear-Reactor Safety (CFD4NRS). It was held in Shanghai Jiao Tong University on 4-6 September 2018 and focused on state-of-the-art (single-phase and multiphase) CFD applications reflecting topical issues in nuclear power plant design and safety, but in particular on promoting the release of high-resolution experimental data to continue the CFD validation process in this application area.