One of the societal challenges of our time is to design, build and operate repositories for the safe disposal of long-lived nuclear waste. This chapter considers the question of how to manage transmissions of essential records, knowledge and memory concerning final repositories for nuclear waste across long time periods. Most stakeholders in the nuclear waste sector agree that it is important to empower future generations to make informed decisions during any kind of interaction with the repository to avoid inadvertent intrusion or facilitate safe retrieval of any part of the content. The long-term preservation of nuclear waste and the legacy of the nuclear age are not only technical and historical concerns but deeply cultural. Heritage negotiates people’s understanding and a society’s relationship between past, present, and future. This applies to nuclear waste to the same extent as to other forms of cultural heritage.