[en] The following annotated bibliography lists documents prepared by the Department of Energy (DOE), and predecessor agencies, to meet the requirements of the National Environmental Policy Act (NEPA) for activities and facilities at Sandia National Laboratories sites. For each NEPA document summary information and a brief discussion of content is provided. This information may be used to reduce the amount of time or cost associated with NEPA compliance for future Sandia National Laboratories projects. This summary may be used to identify model documents, documents to use as sources of information, or documents from which to tier additional NEPA documents

[en] The use of nuclear reactions for depth profiling carbon and oxygen in solids is discussed. A general expression for the yield from a nuclear reaction is derived and used to extract depth profiles from the energy spectra by two methods. The first method compares data from a target of unknown composition with a target containing a known concentration of either carbon or oxygen. By dividing the yields from the samples for equal collision energies, a concentration profile within the analyzed sample can be obtained. The second method uses published reaction cross section data to obtain the profile. The (d,p) profiling is demonstrated for carbon in ScD₂. A comparison between the two methods is made by extracting carbon profiles in the near surface region of ScD₂ samples. Effects due to inaccurate stopping cross section data are described. The technique is discussed for the ¹⁶O(d,p) reactions used to profile oxygen along with the effect of interferences from the ²H(d,p)³H reaction and other reactions

No abstract available

[en] This paper presents the results and observations of a study performed by the authors to parametrically evaluate the performance characteristics of a foam process for application of decontamination agents. The initial tests were established to assess foam quality. Subsequent tests determined the ability of the foam as a carrier of chemical systems, and established system operating parameters. The technique was then applied in an actual decontamination task to verify effectiveness of these established parameters and to determine decontamination reduction factors. 4 figures, 5 tables

[en] This study examines the influence of the properties of various vascular graft materials on the bacterial adherence process of two different strains of Staphylococcus epidermidis (mucous and normucous producing). Dacron grafts (both knitted and woven), Teflon grafts, and Dacron grafts coated with one and two layers of silicone were studied because these materials differ significantly in porosity, hydrophobicity, and surface charge (zeta potential). Graft segments were immersed in ³H-labeled bacteria solution for periods ranging from 5 to 180 minutes and liquid scintillation techniques were used to quantify bacterial adherence. The porous knitted Dacron material had a significantly higher rate of bacterial adherence than either the woven Dacron or Teflon (p less than 0.05). Silicone coating (either one or two layers) reduced adherence by a factor of four for the knitted Dacron (p less than 0.05) and by a factor of two for woven Dacron (p less than 0.05). The mucous producing strain of S. epidermidis displayed significantly better adherence to woven and knitted Dacron than the normucous producing strain, but only when 0.25% dextrose was added to the bacteria solution. These findings indicate that the highly porous knitted Dacron grafts have the highest propensity for bacterial adhesion. Graft materials with the most negative zeta potentials are more resistant to bacterial adherence. Silicone coating of Dacron material significantly changed adherence characteristics, suggesting that this may be a viable strategy for protecting implantable medical devices containing materials to which bacteria readily adhere

[en] The use of nuclear reactions for depth profiling carbon and oxygen in solids is discussed. A general expression for the yield from a nuclear reaction is derived and used to extract depth profiles from the energy spectra by two methods. The first method compares data from a target of unknown composition with a target containing a known concentration of either carbon or oxygen. By dividing the yields from the samples for equal collision energies, a concentration profile within the analyzed sample can be obtained. The second method uses published reaction cross-section data to obtain the profile. The (d, p) profiling is demonstrated for carbon in ScD₂. A comparison between the two methods is made by extracting carbon profiles in the near surface region of ScD₂ samples. Effects due to inaccurate stopping cross-section data are described. The technique is discussed for the ¹⁶O(d, p) reactions used to profile oxygen along with the effect of interferences from the ²H(d, p)³H reaction and other reactions. (Auth.)

[en] The Prompt Gamma Neutron Activation Analysis (PGAA) technique yields elemental composition data which can be used to calculate the macroscopic cross section for any sample. The Small Sample Reactivity Measurements (SSRM) technique yields the macroscopic thermal absorption directly. Experimentally, PGAA is somewhat more difficult because of the calibration and data handling than is SSRM. However, SSRM requires a mathematical model of the reactor which means a rather complicated analysis. Once the model and calibration are completed, data analysis is routine. The SSRM technique is production oriented. 9 figures

No abstract available

No abstract available

[en] The behavior of Ti--Mo--Au metallization on Al₂O₃ and C was investigated by backscattering spectrometry. Results show that Mo--Au bimetal films typically mix during deposition. Diffusion of Ti in Mo film occurs at 600⁰C, but is inhibited by the presence of oxygen in the Ti film. Even 1000 A of Mo is not a barrier against interdiffusion of Ti and Au during 20-min anneals at 600⁰C. The amount of mixing observed also depends on the nature of the substrate which supports the Ti--Mo--Au metallization. (U.S.)