Abstract: A reloading device for brachytherapy of tumors is to be simplified in terms of the replacement of the radiation source at the irradiation site. At least two tubes are provided for receiving a longitudinally displaceable cable at the end of which a radiation source can be applied. The tubes can be connected, via a source replacement device and a shield, to a removable and adjustable distributor, from which lines lead to the tumor. By adjusting the distributor, the respectively desired line can be oriented to the respectively desired tube and in this way the desired radiation source can be introduced preferably step by step into the tumor.

Abstract: A device for brachytherapy, has at least one radiation source which can be introduced into the body and which is arranged at the tip of a flexible guide cable and which is easy and safe to operate. The guide cable is arranged so that it can be wound and unwound in a helical groove of a rotatable reel element and is guided from there to an outlet via a shield, from which outlet the introduction of the radiation source is effected with a catheter. The rotation of the reel element and thus the movement of the radiation source are locked.

Abstract: A nuclear power station includes a feedwater/steam circuit having a condensate-purification device and a feedwater pump connected upstream of a reactor pressure vessel. A branch line has a gas-injection device for introducing hydrogen into a coolant to ensure especially low maintenance and repair costs of the gas-injection device and an especially homogeneous distribution of hydrogen produced in the gas-injection device. The branch line branches off from the feedwater/steam circuit directly downstream of the condensate-purification device and discharges into the feedwater/steam circuit directly upstream of the feedwater pump.

Abstract: An apparatus admits gas into the primary coolant of a pressurized water nuclear reactor having a coolant loop for a liquid coolant, in particular water, to which hydrogen is to be added. The coolant loop preferably includes a volume control tank for the coolant as well as at least one high-pressure pump which admits coolant that has been extracted from the coolant loop back into the coolant loop again. An admission point for the hydrogen is located in a suction line on the suction side of the high-pressure pump. A measurement line on the pressure side of the high-pressure pump communicates with the volume control tank or with a dewatering system. A device for measuring the hydrogen content in the coolant is incorporated into the measurement line. The measuring device is connected through a control device to a control valve, with which the delivery of hydrogen to the admission point can be controlled. The gas admission apparatus assures a definite, precisely maintained hydrogen content in the coolant.

Abstract: A system is for supplying a generator with hydrogen, in particular a generator of a power generating plant. The system offers a high level of safety while at the same time making handling easy. The system includes a closed system cycle for carrying water and/or gas and a hydrogen feed line, branching off from the system cycle, for the generator. The system cycle includes an electrolysis unit designed as a membrane electrolyzer.

Abstract: An electrolysis unit having a plurality of membrane electrolytic cells connected in series suitable for use in a service station for supplying a motor vehicle with hydrogen as fuel. Each of the membrane electrolytic cells has a membrane provided on both sides with an appertaining contacting disk, especially a support mat made up of a large number of metal wires laid over each other and pressed together. In a service station, a gas cleaning unit is installed on the inlet side upstream from such an electrolysis unit.

Abstract: A system is for supplying a generator with hydrogen, in particular a generator of a power generating plant. The system offers a high level of safety while at the same time making handling easy. The system includes a closed system cycle for carrying water and/or gas and a hydrogen feed line, branching off from the system cycle, for the generator. The system cycle includes an electrolysis unit designed as a membrane electrolyzer.

Abstract: A conditioning system for reducing an oxygen content of water carried in a subsystem of an industrial plant includes an electrolysis unit having a hydrogen side, an anode, and a cathode. The anode and cathode are connected to the subsystem to decompose water into hydrogen and oxygen. A hydrogen/oxygen recombination catalyst is connected to the subsystem. The hydrogen/oxygen recombination catalyst follows the anode and cathode on the hydrogen side. A method for lag reducing an oxygen content of water carried in a subsystem of an industrial plant, includes the steps of electrolytically decomposing water from a subsystem of an industrial plant into hydrogen and oxygen, and using the hydrogen generated at the same time for recombining the oxygen contained in the water.

Abstract: A conditioning system for reducing an oxygen content of water carried in a subsystem of an industrial plant includes an electrolysis unit having a hydrogen side, an anode, and a cathode. The anode and cathode are connected to the subsystem to decompose water into hydrogen and oxygen. A hydrogen/oxygen recombination catalyst is connected to the subsystem. The hydrogen/oxygen recombination catalyst follows the anode and cathode on the hydrogen side. A method for reducing an oxygen content of water carried in a subsystem of an industrial plant, includes the steps of electrolytically decomposing water from a subsystem of an industrial plant into hydrogen and oxygen, and using the hydrogen generated at the same time for recombining the oxygen contained in the water.

Abstract: An electrolysis apparatus has a number of membrane electrolysis cells. Each of the cells has a membrane formed on both sides with a contact layer. The apparatus, while it is compact in its design, is also suitable for comparatively high hydrogen production rates and can consequently be used particularly flexibly. A contact plate is respectively arranged on each contact layer. Each of the contact plates is formed, on its surface facing the contact layer assigned to it, with a system of ducts for the transport of water and/or gas.

Abstract: A device for gasifying water conducted in a subsystem of a technical installation with hydrogen includes an electrolysis unit connected in the subsystem for decomposing some of the water conducted therein into hydrogen and oxygen, and a dissipation system connected to the electrolysis unit for dissipating oxygen received therefrom.

Abstract: An afterloading device for handling radioactive material used in connection with the irradiation of malignant tumors has (1) a radiation-shielded container, (2) a number of channels within the container for transporting radioactive material-containing ribbons to and from the radiation therapy patient, (3) a device for propelling such ribbons along the channels and into external tubes leading into the patient, and (4) a coupling element connecting the channels to the external tubes leading into the patient, which coupling element is detachable from the container, channels, and propelling device. The propelling device is preferably ring magnets movable along the exterior of the channels.

Abstract: Solidifying radioactive liquid concentrate residues containing borates by embedding in a binder by mixing. Prior to embedding, sodium hydroxide is added to the waste concentrate to obtain a mole ratio of sodium to boron of 0.25 with a corresponding pH value in the range of 7.3 to 8.0 or 0.7 with a corresponding pH value of 9.8 to 10.2. The waste concentrate with added sodium hydroxide is mixed with a binder to embed it into the binder.

Abstract: Method for the ultimate disposition of radioactive wastes by vitrification, in which weak to medium radioactive waste concentrates from borate-containing radioactive liquids are mixed with added glass-forming materials, maximally in a ratio of 1:3, and the mixture heated to obtain a glass-forming melt.

Abstract: Mixing devices such as worm machines used for embedding radioactive wastes in hot bitumen are cleaned to remove residual bitumen and salt incrustations in three successive operations: (a) Washing with a solvent for bitumen in a volume amount equal to about the free space of the device. (b) Rinsing with a water-soluble rinsing medium miscible with the solvent in a volume amount the same as (a). (c) Rinsing with demineralized water in a volume amount twice (b). Pumice gravel is used to absorb the solvent and rinsing medium and the resultant pumice embedded in bitumen and sent to ultimate storage.

Abstract: Liquid-containing radioactive wastes are bound into thermoplastic material by introducing particles of thermoplastic material at a non-sticking temperature into a kneading machine, heating the thermoplastic material in the absence of radioactive wastes to at least 100.degree. C., adding the liquid-containing wastes to the heated thermoplastic material, mixing and concurrently increasing the temperature of the mixture to a temperature of about 200.degree. C. or more to vaporize liquid in the mixture, maintaining the mixture at a vaporization temperature to dry to the mixture, releasing evolved vapors and discharging the dried mixture from the kneading machine. Difficulties due to clogging of the kneading machine and fluctuations in the consistency of the dried end product are minimized.

Abstract: Method of removing radiant, pulverulent synthetic wastes which are mixed dry with a thermoplastic mass in a kneader and then delivered from a discharge opening of the kneader into a container capable of providing a final storage therefor, while gases and/or vapors are withdrawn from degassing domes of the kneader, which includes delivering fluidic dried wastes by mechanical movement through a metering tube into a degassing dome in the kneader disposed next to the discharge opening, and admitting scavenging gas into the metering tube at least temporarily in direction toward the kneader; and device for carrying out the foregoing method.

Abstract: Worm extruder assembly includes an extruder worm, a steam dome formed as a cylindrical tube disposed transversely to the worm axis, a condenser surrounding the cylindrical tube, a steam outlet line extending from the steam dome to the condenser, and means defining an annular gap connecting the condenser to the cylindrical tube.

Abstract: Method and apparatus for encapsulating radioactive plastic wastes, particularly radioactively contaminated ion exchange filter material containing water, in bituminous solidification substances, by drying the radioactive waste separate and apart from the bituminous substance, introducing regulated amounts of dry radioactive waste into the bituminous substance and kneading the mixture at a temperature of 120.degree. C. or lower to encapsulate the dry radioactive waste by the mechanical action of the kneading, and pouring the kneaded, encapsulated radioactive plastic waste into a container. Undesired decomposition with discharge of pollutants into the atmosphere are avoided.

Abstract: An electrolysis apparatus has a number of membrane electrolysis cells. Each of the cells has a membrane formed on both sides with a contact layer. The apparatus, while it is compact in its design, is also suitable for comparatively high hydrogen production rates and can consequently be used particularly flexibly. A contact plate is respectively arranged on each contact layer. Each of the contact plates is formed, on its surface facing the contact layer assigned to it, with a system of ducts for the transport of water and/or gas.