Abstract: A shield contact element for shielding a plug connection includes a housing shell and a contact lamella. The housing shell has a cylindrical shape and extends in an axial direction for receiving a plug connector, the plug connector connecting to a plug contact element to form the plug connection. The contact lamella extends in the axial direction and creates an electrical connection between the housing shell and a shield for shielding the plug contact element. The contact lamella has a contact foot disposed in a recess formed in the housing shell to electrically contact the housing shell with the shield in the recess.

Abstract: A connection arrangement includes an expansion ferrule insertable in a slidable manner into a central opening of an electrical contact element and an expansion element inserted into the expansion ferrule. The expansion ferrule is expanded when the expansion element is fully inserted into the expansion ferrule to clamp the electrical contact element and fasten the electrical contact element to an electrical conductor.

Abstract: A cobalt coincidence radioactivity detector is used to separate radioactive concrete dust from uncontaminated dust resulting from dismantling a nuclear power plant. A suction air stream carries the dust through a vacuum line to a cyclone segregator. The dust falls into a smaller first container from the segregator, and the detector detects radioactivity in the filled first container. The dust is transferred from the first container to a second container if the detected radioactivity exceeds a predetermined threshold. The dust is transferred from the first container to a third container if the detected radioactivity does not exceed the predetermined threshold. A filter collects the dust carried past the segregator by the suction air stream. If the radioactivity detected in the dust that collects on the filter exceeds the predetermined threshold, the dust in the first container is transferred to the second container before the first container is allowed to fill.

Abstract: A cobalt coincidence radioactivity detector is used to separate radioactive concrete dust from uncontaminated dust resulting from dismantling a nuclear power plant. A suction air stream carries the dust through a vacuum line to a cyclone segregator. The dust falls into a smaller first container from the segregator, and the detector detects radioactivity in the filled first container. The dust is transferred from the first container to a second container if the detected radioactivity exceeds a predetermined threshold. The dust is transferred from the first container to a third container if the detected radioactivity does not exceed the predetermined threshold. A filter collects the dust carried past the segregator by the suction air stream. If the radioactivity detected in the dust that collects on the filter exceeds the predetermined threshold, the dust in the first container is transferred to the second container before the first container is allowed to fill.