Radiation effects in ytterbium-doped silica optical fibers: traps and color centers related to the radiation-induced optical losses
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Technology Insights and Perspectives for Nuclear Fuel Cycle Concepts
The following report provides a rich resource of information for exploring fuel cycle characteristics. The most noteworthy trends can be traced back to the utilization efficiency of natural uranium resources. By definition, complete uranium utilization occurs only when all of the natural uranium resource can be introd…
Modeling of Reactor Kinetics and Dynamics
In order to model a full fuel cycle in a nuclear reactor, it is necessary to simulate the short time-scale kinetic behavior of the reactor as well as the long time-scale dynamics that occur with fuel burnup. The former is modeled using the point kinetics equations, while the latter is modeled by coupling fuel burnup e…
NEXT GENERATION NUCLEAR PLANT LICENSING BASIS EVENT SELECTION WHITE PAPER
The Next Generation Nuclear Plant (NGNP) will be a licensed commercial high temperature gas-cooled reactor (HTGR) plant capable of producing the electricity and high temperature process heat for industrial markets supporting a range of end-user applications. The NGNP Project has adopted the 10 CFR 52 Combined License…
Development of the Army Facility Mission Dependency Index for Infrastructure Asset Management
project prioritization, identification of divesture opportunities, and physical security hardening.Also, the MDI is consistent with the requirements of Executive Order 133327, Federal Real Property Asset Management, which specifically calls for "prioritizing actions to be taken to improve the operational and financial…
Characters of Lattice Fermions Based on the Hyperdiamond Lattice
We study minimal-doubling fermion actions on hyperdiamond and deformed-hyperdiamond lattices, with emphasis on the real-space construction of them and Lorentz covariance of excitations from fermion poles. We propose the improved spatial construction of Creutz fermion action on a deformed hyperdiamond lattice, and disc…
High Temperature Gas-Cooled Reactors Lessons Learned Applicable to the Next Generation Nuclear Plant
This DOI is not currently attached to any metadata records. DOIs can’t actually ever be deleted (they’re persistent), but sometimes our members create DOIs in error. We do have a process to approximate deletion which we follow only in rare cases where the DOI has been genuinely created in error, and most crucially, if…
Baseline Graphite Characterization: First Billet
The Next Generation Nuclear Plant Project Graphite Research and Development program is currently establishing the safe operating envelope of graphite core components for a very high temperature reactor design. To meet this goal, the program is generating the extensive amount of quantitative data necessary for predicti…
Conceptual Design of Forced Convection Molten Salt Heat Transfer Testing Loop
This report develops a proposal to design and construct a forced convection test loop. A detailed test plan will then be conducted to obtain data on heat transfer, thermodynamic, and corrosion characteristics of the molten salts and fluid-solid interaction. In particular, this report outlines an experimental research…
Technical Assessment of Compressed Hydrogen Storage Tank Systems for Automotive Applications
This technical report describes DOE's assessment of the performance and cost of compressed hydrogen storage tank systems for automotive applications. The on-board performance (by Argonne National Lab) and high-volume manufacturing cost (by TIAX LLC) were estimated for compressed hydrogen storage tanks. The results wer…
Handbook on nuclear law : implementing legislation
Access to a well organized body of resource materials for helping States in drafting nuclear legislation is possible with the help of this handbook. [IAEA]. http://www-pub.iaea.org/books/IAEABooks/8374/Handbook-on-Nuclear-Law-Implementing-Legislation
Statistical distributions in the folding of elastic structures
The behaviour of elastic structures undergoing large deformations is the result of the competition between confining conditions, self-avoidance and elasticity. This combination of multiple phenomena creates a geometrical frustration that leads to complex fold patterns. By studying the case of a rod confined isotropica…
Identification of point defects in treated single crystal diamond
The research reported in this thesis is focused on the identification of the \nstructure of point defects in diamond using a variety of spectroscopic techniques. \nThe defects studied are introduced by doping during synthesis, irradiation damage \nand annealing. Diamond produced by high-pressure high-temperature (HPHT…
Homocitrate synthase connects amino acid metabolism to chromatin functions through Esa1 and DNA damage
The enzyme homocitrate synthase (HCS) catalyzes the first step in lysine biosynthesis, and early biochemical data placed it in the cytoplasm or mitochondria, where most amino acid synthesis occurs. It was therefore surprising when refined fractionation techniques and specific immunoreagents clearly demonstrated its lo…
Next Generation Nuclear Plant Steam Generator and Intermediate Heat Exchanger Materials Research and Development Plan
DOE has selected the High Temperature Gas-cooled Reactor (HTGR) design for the Next Generation Nuclear Plant (NGNP) Project. The NGNP will demonstrate the use of nuclear power for electricity and hydrogen production. It will have an outlet gas temperature in the range of 900°C and a plant design service life of 60 yea…
Infraread detection of thermal heat development of isotropic and anisotropic materials during impulse current testing
This paper suggests the use of continuous infrared thermogram recording for investigation of heat development in composite materials with integrated conductive or anisotropic conductive elements. The heating investigated is due to either induced or direct coupled effects from a lightning discharge current through the…
Induced auto-octoploidy in Som, Persea Bombycina (King Ex Hook. F.) Kosterm
Presently auto-octoploidy has been induced in an induced auto-tetraploid som, Persea bombycina (2n=24), the principal food plant of muga silkworm (Antheraea assamensis Helfer), through colchicine treatment (0.5%). Auto-octoploids showed deterioration in almost all the morphological features in contrast to tetraploid w…
Simulation of transient behavior of grounding grids
In this paper the simulation of grounding grids and the study of their transient behavior when high impulse currents appear (such as lightning strokes), including the phenomenon of the soil ionization, are presented. An efficient mathematical model to simulate this situation is one based on the circuit approach. The t…
Numerical study on hydrogen retention at a grain boundary in tungsten
In this thesis the hydrogen retention at a Σ3(111) regular grain boundary in tungsten and its effect on the mechanical strength are investigated based on the first principles methods. The trapping energy for hydrogen at each site is calculated to show which one is most stable. Then, we studied on hydrogen segregation…
The Art of Electrospinning: A Nanotechnology Engineering Investigation for Physics and Chemistry Labs
[ILLUSTRATION OMITTED] Electrospinning is a process in which electric charge is used to remove fine fibers from a liquid. The first electrospinning process was introduced in the early 20th century for spray painting, and by the 1970s, it was also creating fibers in the submicroscale and nanoscale range (1 x 10-5 to 1…