Environmental levels of {sup 129}I and natural {sup 127}I have been measured by neutron activation analysis .on samples from throughout the United States at locations near and remote from release points . Highest {sup 129}I concentrations were observed near nuclear fuel reprocessing facilities. Levels of {sup 129}I above natural iodine background were observed at all locations studied. The sample data establishes baseline levels of environmental {sup 129}I for the expanding nuclear industry.

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In developing radiation detection instrumentation at Rocky Flats, a system concept using plug-in modules was planned. Losses of operational time due to maintenance are drastically reduced as a malfunctioning module can be replaced within minutes. Versatility is another advantage of the modular concept and a particular module can be used in many different system designs. A significant cost savings in system development can also be realized. Two of the timers described are housed in two-wide Nuclear Instrumentation Bin (NIM-BIN) modules and a third model in a one-wide NIM-BIN module. The design uses the latest COS/ MOS (complimentary symmetry metal-oxide semiconductor) integrated circuitry, featuring low power, low cost, and high reliability. These modules were developed specifically for radiation detection systems. Model 24370-21 is used in gross alpha detection systems. Model 27213-21 appears in a medical wound- counter system and the third, Model 27213-23, operates in a gamma spectrometer system. These modules can have application in other related systems as well. Operational procedures and servicing are included. (auth)

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When beams collide with non-zero crossing angles, there is a dipole component to the beam-beam force, thus introducing a closed orbit distortion. If the force experienced by a particle is antisymmetric about the collision center, then the distorted orbit still passes through the collision center but with a changed slope, resulting in a shift from the nominal crossing angle. This antisymmetry in the force occurs for coasting beams, while for bunched beams, it is the case for particles at the center of the bunches, assuming that the bunches overlap exactly around the collision center. The presence of synchrotron motion means that the beam- beam force experienced by a particle modulates as the particle moves back amd forth within the bunch. Specifically, a symmetric component to the force is introduced. If the synchrotron period is much longer tham the betatron period, the modulation of the force is adiabatic, and so the effect is a modulation of the closed orbit. The symmetric compoment of the dipole force causes; shift in the closed orbit at the collision center. This indicates a tendency for the beams to separate, which in turn changes the mature of the force between the two beams. The closed orbit …

A rapid spectrochemical method, involving the application of a condensed spark to finished or semifinished uranium metal surfaces, was developed to analyze large numbers of parts (50 or more in a single day) for up to nine specification impurity elements. No sampling or preparation is required, and the on-site analysis is carried out by transporting the spectrograph and source to the production area. The procedure is used for process control and is supplemental to the more refined pyro carrier spectrochemical analysis used for product certification. Elements determined by the large quartz prism spectrograph include: copper, iron, molybdenum, nickel, niobium, titanium, silicon, and zirconium. Carbon is determined by a very slight change in procedure. (auth)

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