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Conference: JOWOG28
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United States

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Krentz, T., Gaillard, J., Peters, B., Fox, E., Hitchcock, D., Serkiz, S., and Velten, J. DEGRADATION RESISTANT CARBON NANOMATERIAL REINFORCED ELASTOMERS FOR TRITIUM SERVICE. United States: N. p., 2017. Web.
Krentz, T., Gaillard, J., Peters, B., Fox, E., Hitchcock, D., Serkiz, S., & Velten, J. DEGRADATION RESISTANT CARBON NANOMATERIAL REINFORCED ELASTOMERS FOR TRITIUM SERVICE. United States.
Krentz, T., Gaillard, J., Peters, B., Fox, E., Hitchcock, D., Serkiz, S., and Velten, J. 2017. "DEGRADATION RESISTANT CARBON NANOMATERIAL REINFORCED ELASTOMERS FOR TRITIUM SERVICE". United States. doi:.
author = {Krentz, T. and Gaillard, J. and Peters, B. and Fox, E. and Hitchcock, D. and Serkiz, S. and Velten, J.},
abstractNote = {},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2017,
month = 8

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  • The non-destructive test system called FRP Corrosion Resistant Barrier Deterioration and Damage Detection that is described can be run while the FRP equipment is in service. The system can alert chemical plant companies to changes in the chemical corrosion barrier which can allow corrective action to be taken before any leaks or releases of chemicals occur. The paper covers the fundamentals, history and development of a concept into a plant-scale working test system. Properly implemented, the system can reduce equipment inspections needed and give substantial reductions in maintenance costs and the need for confined space entries.
  • Based on its tritium radiation resistance, ethylene propylene rubber has been selected as a candidate for replacement of nitrile rubber in the SRP tritium facilities. A specification for flange gasket material has been developed for ethylene propylene such that its mechanical properties are similar to those of nitrile rubber. In-process testing of ethylene propylene and nitrile gaskets will be conducted in the tritium facilities under identical exposure conditions.
  • The primary focus of this study was to determine the possible rates of roof and wall failure and the times to structural collapse of the roof and walls of three vault designs at the Department of Energy`s Savannah River Site near Aiken, South Carolina. Failure was defined as a loss of ability to divert soil water around the vault. Collapse was defined as the total loss of structure integrity of the vault. Failure and eventual collapse of the three vault types results from concrete deterioration under stress, in the presence of corrosive soil water. Degradation rates for reinforced concrete weremore » utilized, and the resultant changes in properties (such as strength, thickness, cracking and hydraulic conductivity) were evaluated. Baseline times to failure and collapse of the walls and roof components were modeled, and sensitivity analyses were conducted to provide boundaries on these estimated times. Thus, the goal of the project was to provide a bounding analysis of the time to roof and wall failure and potential collapse, rather than an actual prediction of the time to failure, and collapse.« less
  • Lasers provide unique growth conditions for the synthesis of novel nanomaterials. In addition, they can serve as remote spectroscopic probes of the growth environment. Ultimately, through the process understanding they provide, real-time laser diagnostics that can be used to control the nanomanufacturing of nanomaterials. Here, progress in the laser-based synthesis and investigations of carbon nanomaterial growth kinetics will be reviewed with an emphasis on single-wall carbon nanotubes (SWNTs), single-wall carbon nanohorns (SWNHs), and graphene. Two synthesis methods will be compared. First, the unique high-temperature growth environment of a laser plasma will be examined using time-resolved imaging and laser spectroscopy tomore » understand how pure carbon can self-assemble rapidly into a variety of forms including SWNHs and graphene flakes, and with catalyst-assistance, SWNTs. Atomic resolution images of SWNTs, SWNHs, and graphene reveals that graphene flakes are likely building blocks for the growth of these materials. Second, lower-temperature, chemical vapor deposition (CVD) methods suitable for mass production of nanomaterials will be examined. Pulsed-CVD and pulsed laser deposition (PLD) are described to investigate the catalyst-assisted growth kinetics of graphene and SWNTs. Time-resolved laser reflectivity and Raman spectroscopy studies show that autocatalytic kinetics imply the existence of intermediates crucial to the efficient nanomanufacturing of these materials for energy applications.« less
  • The definition of effective constitutive laws of advanced composites is re-examined and the theoretical limitations of such definition are discussed for Elastic and Viscoelastic Constitutive Laws of Cord Reinforced Rubber Composites. The theoretical models for calculating the viscoelastic energy loss characteristics of these composites are then discussed. These characteristics generally defy closed form solutions and hence are obtained numerically. The numerical procedures and numerical results are discussed and compared with data obtained from an extensive experimental program.