[en] The current status of evaluated heavy element decay data for reactor-related calculations is discussed. This includes a listing of data compilations and evaluations that have been published since the end of 1975 and are judged to be relevant to heavy element decay data. Detailed comments are also made on the current status of those actinide decay data which were identified as important at the First Advisory Group Meeting on Transactinium Isotope Nuclear Data, November 1975. (author)