Abstract: A method for measuring parameters of plastic ground (2), includes forming a ole (3) in the ground (2) and placing a pipe (7) in this hole (3) to collect groundwater in various places. The pipe (7) is equipped with several closed chambers (8) which are closed off on the outside of the pipe (7) by filters (9), and through which conduits (10) extend. The conduits (10) are connected separately onto the chambers (8). Measurements are carried out after the plastic ground (2) has been pressed against the filters (9) through settling.

Abstract: A method for separating boric acid from a liquid, especially liquid waste obtained from a nuclear power plant. In the method, the waste solution containing the boric acid is contacted with steam in a reactor so that the boric acid evaporates from the liquid and passes into the steam vapor phase. Consequently, the radioactive wastes which are not evaporated with the steam remain in the waste water while the boric acid is removed from the waste water when it passes into the vapor or steam phase. The boric acid can then be separated and recovered from the steam by means of a distillation and fractionating column or a wash column. By removing the boric acid from the liquid waste, it is possible to obtain concentrated radioactive waste having a reduced volume due to the absence of boric acid in the waste.

Abstract: The present invention provides a method for separating boric acid from a liquid, especially liquid waste obtained from a nuclear power plant. In the process, the waste solution containing the boric acid is contacted with steam in a reactor so that the boric acid evaporates from the liquid and passes into the steam vapor phase. Consequently, the radioactive wastes which are not evaporated with the steam remain in the waste water while the boric acid is removed from the waste water when it passes into the vapor or steam phase. The boric acid can then be separated and recovered from the steam by means of a distillation and fractionating column or a wash column. By removing the boric acid from the liquid waste, it is possible to obtain concentrated radioactive waste having a reduced volume due to the absence of boric acid in the waste.

Abstract: An inorganic gas separator which has a porosity between 30 and 70% and a pore diameter between 10 and 100 .mu.m, and which is gas impermeable when soaked-through with liquid, is mounted in a frame, divides a cell housing into two compartments, and is moistened by capillarity with liquid fed through channels extending in the frame. In each compartment are mounted a porous foil, an electrode, a pre-electrode, a metal plate and an insulating plate. On the cell-housing thermo-electric heat pumps are mounted for cooling and the unit formed by the housing and the pumps is surrounded by an outer casing.

Abstract: In a gas treating device liquid is pressurized in a liquid chamber and is fed from this chamber into ejectors which open directly into venturi fittings which are surrounded by a gas chamber. Gas enters through an inlet into this gas chamber. A gas-liquid mixture enters from the venturi fittings into a tank, where the gas is separated from the liquid. Liquid from the tank is fed through a pump into the liquid chamber. Gas escapes from the tank into a discharge line comprising a de-mister.

Abstract: The outlet of the collectors is connected to the inlet thereof by means of a line in which are mounted the primary part of a heat exchanger condenser, a vacuum pump, a venting cylinder, and a flow-control device. A distributing device feeds water with a pressure drop and a small flow rate from the line into each collector. The flow rate is such that water in liquid form does not fill completely the collectors and vaporizes at least for the most part before leaving the collectors. The heat exchanger comprises a secondary part which is part of a hot water line which runs in closed circuit and wherein are mounted a circulating pump and a storage tank.

Abstract: The equipment for determining the position of a metal pin in a bone comprises a support, a radiating self-induction coil mounted on the support and two receiving self-induction coils mounted on the support. A receiving coil is arranged on either side of the radiating coil but the space between the receiving coils facing the radiating coil remains free. The radiating coil is supplied by an oscillator with a frequency of about 30 kHz. The receiving coils control signaling members according to the phase-shift of signals generated by the receiving coils.

Abstract: There is described a method for separating iodine in solid form, from an acid mercury salt solution, which comprises subjecting said iodine-containing mercury salt solution at a pH value between 2 and 8, at an electrolysis for separating the mercury, and thereafter precipitating from the resulting, substantially mercury-free solution, the iodine in the form of a salt.

Abstract: Carrier particles whereon a metal from the group VIII of the periodic element system is fixed are dry-mixed with particles from hydrophobic material which is simultaneously a binder and may thus bind the carrier particles together. The thus obtained mixture is subjected to an agglomeration step. The resulting agglomerates are broken. The broken agglomerates are screened and that fraction with a grain size smaller than 1 mm is pressed into a cake at a pressure of 25 kg/cm.sup.2 at the most. The press cake is rolled and catalyst particles are cut from the rolled cake. The catalyst particles are mixed with hydrophilic particles. The thus obtained mixture is used in an isotopic exchange column for separating tritium from aqueous effluents. In this column the effluents are lead in counter-current to gaseous hydrogen.

Abstract: There is described a method for enriching a gas-like isotopic mixture with at least one isotope, in which a mixture of CF.sub.2 Cl.sub.2 and O.sub.2 is irradiated by means of a pulsed and focalized laser beam having an optical frequency corresponding to a wave number lying in the band from 920 to 945 cm.sup.-1 to enrich the residual CF.sub.2 Cl.sub.2 with .sup.37 Cl, in the band from 1050 to 1075 cm.sup.-1 to produce COF.sub.2 enriched with .sup.13 C and/or in the band from 1080 to 1095 cm.sup.-1 to enrich the residual CF.sub.2 Cl.sub.2 with .sup.35 Cl and .sup.13 C.

Abstract: The method comprises the steps of preparing a solution of a binder in a solvent, wetting and grinding polyantimonic powder, forming a suspension with the wetted and ground powder and the solvent, mixing the suspension with the solution, pouring on a plate the so obtained viscous liquid, allowing the solvent to evaporate until a membrane in formation begins to dry, removing further the solvent by lixiviation, and removing the membrane from the plate.

Abstract: A potential pulse train corresponding to the reaction proceeding at the electrode is superposed on the potential of the electrode for influencing an electrocatalytic reaction proceeding at that electrode.Examples of such reactions are the oxidation of methanol on a platinum electrode and the oxidation of hydrogen, hydrazine or ammonia on an alloy electrode.

Abstract: Vanadium carbide is present in the particles as supersaturated solid solution and the particles are coated with a thin porous layer of vanadium carbide.