Small modular reactors (SMRs) and floating nuclear power plants (FNPPs) are currently under research and development in many countries. These technologies have several advantages such as low initial investment, high safety, and flexibility in construction, operation and application. China is developing many SMR technologies for both land-based and sea-based, for instance, ACP100, ACPR50S, DHR400, HTR-PM, etc. and plans to build FNPPs to be deployed in the disputed waters like the East Sea. Then the implementation of studies on SMR and FNPP technologies are very necessary for Vietnam, which contributes to offering solutions to the energy security as well as the power supply for economic activities on the seas and islands throughout the country.