The applicability of portable instruments for rapid nondestructive verification of the enrichment of UFg in cylinders has been tested on a large number of types 30-and 5A-cylinders. Three basic techniques were used: gamma eountingjyjth Nal combined with ultrasonic measurement of cylinder wall thickness, passive neutron counting, and active neutron jlnterrogation with therrnal neutrons from a radioactive neutron" --sburceT The resultlngfaccuracies and limitations of the techniques are presented.
VOLUME 2 2, NO. 6, JUNE 1950 795 Table IV shows the half-wave potentials resulting from the electrolyses of 2.439 X 10 "4 molar nitroparaffin solutions, all buffered at pH 4.0. The diffusion currents for each remained constant, within the limits of experimental error, regardless of the buffer solution employed. However, each compound is more easily reduced in the citric acid-disodium phosphate buffer or in the acetate buffer than in either the benzoate or phthalate buffers. Although no explanation of this phenomenon can be given here, it seems logical that these differences may be due to adsorption phenomena at the dropping mercury cathode, or to possible differences in the tautomeric equilibria of the nitroparafhns in different media. In any event, it is clear that the type and concentration of buffer used must be given in order for B1/j to have significance. The dependence of the polarographic reduction of aromatic nitro groups on the buffer system has already been suggested (4).
The applicability of portable instruments for rapid nondestructive verification of the enrichment of UFg in cylinders has been tested on a large number of types 30-and 5A-cylinders. Three basic techniques were used: gamma eountingjyjth Nal combined with ultrasonic measurement of cylinder wall thickness, passive neutron counting, and active neutron jlnterrogation with therrnal neutrons from a radioactive neutron" --sburceT The resultlngfaccuracies and limitations of the techniques are presented.
Abstract.A new Technical Standard that supports the clearance of materials and equipment (personal property) from U.S. Department of Energy (DOE) accelerator facilities has been developed. The Standard focuses on personal property that has the potential to be radiologically impacted by accelerator operations. It addresses material clearance programs and protocols for off-site releases without restriction on use. Common metals with potential volumetric activation are of main interest with technical bases provided in Appendices of the Standard. The clearance protocols in the Standard include three elements: 1) clearance criteria, 2) process knowledge, and 3) measurement methods. This paper presents the technical aspects of the new Standard, discusses operational experience gained in clearance of materials and equipment from several accelerator facilities at SLAC and examples as to how this Standard can be applied to benefit the entirety of the DOE Accelerator Complex.
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