RETENTION, RELEASE, AND MEASUREMENT OF VOLATILE RADIONUCLIDES IN THE MORSLEBEN REPOSITORY PLANT (ERAM)

For the operational and shut-down phases of a repository, compliance with protection goals has to be demonstrated by means of a site-specific safety analysis. With respect to the release of volatile radionuclides from the waste, semi-empirical release rates have been used. To gain confidence in these rates under actual conditions of a repository and to study possible retention and delay mechanisms, an experimental program was initiated at the Morsleben repository plant (ERAM). Measurements and data evaluations are still in progress, preliminary results and conclusions are presented.