immobilization and storage of volatile radionuclides is part of the european community's research programme in the area of radioactive waste management and storage. since the first multiannual randd programme of indirect action, started in 1975, numerous research projects were and are being supported by means of contracts concluded with various organizations and companies in the member states. among the volatile radionuclides particular attention is given to krypton-85, tritium, iodine-129 and carbon-14. as to krypton-85, the methods studied concern its incorporation into a metal matrix by ion sputtering, its locking up into zeolites and its filling into pressure bottles. for the latter, temporary storage in engineered structures on land and sea disposal have been evaluated in addition, possible liquid metal embrittlement of structural and container materials by rubidium, the decay product of krypton, has been investigated. concerning the immobilization of tritium, methods of fixation with calcium phosphates and as metal hydrides have been studied in connection with a preceding screening study on the subject. for iodine-129, a comprehensive study has been drawn up which gives a detailed state of the relevant management technologies, taking into account the radiological aspects regarding finally carbon-14, an assessment study has recently been taken up evaluating the state of knowledge and pointing out possible research requirements