[en] In the event of a nuclear accident it will be necessary to start operations as soon as possible in zones inaccessible to man in order to determine the nature and extent of damage (measurement of various parameters, visual observation and photography) and to take action with a view to limiting the consequences of the accident. These various operations will have to be performed by remote-handling equipment containing measurement devices, television cameras and manipulators. The development of devices for immediate action is not independent of that of devices for subsequent operations either for repair or for dismantling. The paper describes the devices used at present in France and reports the experience gained over several years by the CEA Mobile Remote-Handling Team during action at nuclear facilities. It suggests a strategy for the utilization of such equipment and outlines a programme for developing essential facilities, taking into account the possibilities of international assistance. (author)