摘要:
According to the invention, which is especially applicable in high-energy physics, an energy range and a dosage type H are selected, a radiation detector (14) of a given type is used, spectra measured by the detector are established for various radiations of the given type, the energies of which are within the selected range and the respective dosages of which are known, and on the basis of the spectra, a weighting function is established, i.e. a correspondence between an average dosage increment and an average energy, stored in the detector. This allows a person provided with a dosimeter identical to the detector to know, at all times, the average absorbed dosage flow expressed in the quantity H.
摘要:
Device for handling objects in a glove box comprising a carriage (2) for supporting the items that are to be handled, a base (6) with respect to which the carriage (2) can move along a horizontal axis (X), means of driving the carriage (2) along the axis (X), these drive means comprising an electric motor (14) arranged in such a way that its drive shaft is orthogonal to the axis (X) and projects away from the base (6), a transmission shaft (18) parallel to the motor (14), a rack (22) fixed to the base (6) along the axis (X) and a pinion (24) in direct engagement with the transmission shaft (18) and meshing with the rack (22), a drive belt (20) mechanically connecting the drive shaft of the motor (14) to the transmission shaft (18), the electric motor (14) being disengageable and the carriage being movable by hand along the axis (X).
摘要:
The invention relates to a method for assembling two parts (10, 30) made of Si 3 N 4 in a fluid-tight manner, said two parts comprising a male end (11) and a female end (31), respectively, each of said ends being provided with mechanical assembly means (14, 34) designed to engage one with the other and defining, in the assembled condition, a space (42) therebetween, said method including the assembly of said parts by means of the engagement of the mechanical assembly means of the males and female ends, and the filling of the space existing between said assembly means with a glass seal, and the method is characterized in that the filling process comprises: coating the mechanical assembly means of one and/or the other assembly means of the male and female ends, before assembly, with a borosilicate glass paste; and applying a thermal treatment to the parts after the assembly thereof.
摘要:
The invention relates to a method for selectively recovering americium from an aqueous nitric phase containing americium, curium, and fission products including lanthanides and yttrium, but free of uranium, plutonium and neptunium, or which contains only traces of the latter elements. The invention can be used for processing and recycling irradiated nuclear fuels, in particular to remove americium from raffinates from methods for extracting and purifying uranium and plutonium such as the PUREX and COEX TM methods.