Radiation measurements are key information for risk communication in post-nuclear accident situations. Among the different social media platforms, Twitter offers automated accounts which have been used to share the readings, but often in an incomplete way from the perspective of data sharing and risk communication between citizen and radiation experts. In this paper, the authors investigate the requirements for radiation measurements, by analysing the perceived usefulness of several metadata items that may go along the measurement itself. They carried out a benchmark of existing usages, and conducted a survey with both experts and lay citizens. They thus produced a set of guidelines regarding the metadata that should be used. Furthermore, they created a prototype of a software tool to publish complete measurements and metadata containing suitable information for both experts and citizen based on the requirements.