>Progress reported includes preparation and tensile properties of Pt-Rh-- W alloys, oxidation of Ir, and effects of 0/sub 2/ and CO on tensile properties of T-111 and TZM. (DLC)

Preliminary results are presented from calculations concerning the kinetics and transport of a single SST exhaust plume. Curves are shown that exhibit the effect of different transport rates on axis ozone concentration and total ozone destruction per unit plume length. (auth)

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From meeting of the division of particles and fields; Berkeley, California USA (13 Aug 1973). Threshold effects and oscillating cross sections are reviewed in the context of models (such as the multiperipheral) which employ factorization and indefinite repetition in the t-channel. The origin of logarithmic energy thresholds is illustrated by the ABFST model and applied to antibaryon production and rising cross sections at high energy. Then one discusses large-mass diffraction dissociation and it is argued that this process is not responsible for the increase in the p-p total cross section at ISR energies. (auth)

A study was conducted to determine the seismic effects on the containment structure of a proposed underground reactor facility. Simplified and often inadequate building code equivalent static design procedures frequently used for conventional reactor systems are not adequate for partially buried or fully buried reactor systems. A sophisticated dynamic analysis which can consider soilstructure interaction effects resulting from both seismic displacements and forces must be employed. One such approach would be to use the finite element method. The results of using such an approach to consider both the static overburden and dynamic earthquake effects on the containment structure of the proposed underground reactor facility are presented. (auth)

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The impacts upon the environment resulting from construction, stert-up, and operation of a gaseous dfffusion plant are described. Some of the impacts are typical regardless of location of the plant. Others are atypical and depend upon location; those are presented, by way of example, as they occur at the Portsmouth Gaseous Diffusion Plant. The various environmental contaminants that may be produced in the operating plant are described. The concentrations of those contaminants are stated; and the adverse biological effects of pertinent conteminants are elucidated. UF/sup 6/ may be enriched in the Portsmouth Gaseous Wffusion Plant to almost any /sup 235/U concentration desired. The environmental impact of the plant varies somewhat according to /sup 235/U concentrations. However, commercial plants are not expected to enrich /sup 235/U in concentrations greater than 4%. for this reason, environmental effects due to Portsmouth operations within that range are emphasized. The study revealed that present discharges from the plants generally have no detrimental effects upon the environment. (auth)

Data are given on bend testing of Pt--Rh--W alloys; tensile properties of Pt--Rh--W alloys with and without Hf and Ti additions; tensile properties of recrystallized Ir; effects of contamination by gases (oxygen, degassed impurities, water vapor, CO) on the tensile properties of T-111, TZM, and Mo--46% Re; and fractography and bend testing of T-111 from Pioneer heat source capsules. (DLC)

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Seizing of the metal-to-metal, piston-like carriages of a thermal ionization mass spectrometer vacuum lock was eliminated by replacing 0.0015 in. of the carriage surface with Teflon-S. The vacuum lock has been operated 1600 times in the 3.5 years since the carriages were coated. Both the plastic surface and the mass spectrometer vacuum remain satisfactory. (auth)

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It now appears feasible to attempt to overcome instability losses by the brute force approach. Calculations show that the number of trapped ions can be increased by an order of magnitude and that trapping by ground-state ionization will become important under brute force conditions, because of recent improvements in beam, vacuum, and magnet technology. The key assumption is that the time constant for losses duc to instabilities is constant. (auth)

The computer code TRILIN employs a force method that uses prismatic beam- type elements and discrete masses for the analysis of the transient response of linearly elastic, three-dimensional, frame-type structures subjected to arbitrary loading conditions. Each beam element is capable of resisting tension, bending, and torsion. A global stiffness matrix is obtained by inverting the flexibility relationships. Modal superposition is used to solve the governing equations. (auth)

An ultrasonic Lamb-wave inspection technique was developed for use in inspecting the gas tungsten arc (GTA) welds in small diameter stainless steel tubes for lack of penetration. The particular technique was employed because of the ability to introduce the sound into the material a distance from the weld. A conventional shear-wave technique was tried without success. (auth)

A procedure based on chemicsl separation techniques and activation anslysis was developed for the sequential analysis of low levels of /sup 131/I, / Sup 129/I, and natural iodine in environmental samples. The iodine is first separated from the samples by oxidation. The separated iodine is then counted by low-level, beta-gated gamma spectrometry for the measurement of /sup 131/I. The chemical yield for the separation is measured by means of /sup 125/I tracer. Activation analysis is used for measurement of the separated natural iodine (/sup 127/I) and /sup 129/I. The natural iodine is estimated from either the /sup 126/ I or /sup 128/I activity produced in the sample; the induced /sup 130/I is used to estimate the /sup 129/I concentration. The measurement of /sup 130/I at low levels requires specialized counting methods. Interfering activities that may be present in the irradiated sample include /sup 125/I, /sup 126/I, short-lived fission-product iodine activities produced by activation of uranium impurities, and /sup 82/Br from bromine impurities. Since /sup 130/I decays with several coincident gamma rays, multiple gamma coincidence counting techniques can be used to reduce background and discriminate against interfering activities. Severail three- and four-segmented NaI(Tl) detectors were used for these measurements and compared …

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From nuclear science symposium; San Francisco, California, USA (14 Nov 1973). A computer-controlled air sampling system has been designed and is presently being constnacted. The self-contained, mobile system will collect and record data from eight meteorological sensors. This information will be used in the study of resuspen airborne activity. Air sampler operation will be based on comparisons between the meteorological data and the sampling criteria selected by the operator at the beginning of the run. Correlation between meteorological parameters and resuspension will be used to develop a predictive model. A description of system hardware and a discussion of the software concept are included. (auth)