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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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11 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2018

Study of Bronze Statues “John the Baptist” and “Dancing Cupid” from the Collections of the Pushkin State Museum

Bronze statues “John the Baptist” and “Dancing Cupid” from the collections of the Pushkin State Museum of Fine Arts have been investigated at the National Research Centre “Kurchatov Institute.” These statues were previously damaged in fire. Before carrying out restoration, it was necessary to perform their complex study, including identification of statue materials; elemental and phase analysis of contaminations; estimation of the state of surfaces and internal parts; and detection of technological elements, as well as hidden defects, corroded parts, and cracks. To this end, scanning electron microscopy with X-ray microanalysis, synchrotron radiation diffraction, and neutron radiography and tomography have been used.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
DOE OSTI2018

Porous Titanium Parts Fabricated by Sintering of TiH{sub 2} and Ti Powder Mixtures

A new simple powder metallurgy process by sintering TiH{sub 2} powders was used to manufacture porous Ti components. The effects of the processing parameters (pressure of cold isostatic pressing and sintering temperature) and the TiH{sub 2}/Ti ratio in the powder mixtures on the impurities, the linear shrinkage and the pore properties (including overall and open porosities) were comprehensively determined. The addition of TiH{sub 2} as a reactant has been found beneficial for the synthesis of porous Ti components. The formation mechanisms of pores were demonstrated based on the dehydrogenation process of TiH{sub 2} during sintering, resulting in highest reactivity due to the “in statu nascendi” generation of the metal. In addition, the hardness and corrosion resistance of all the sintered samples were evaluated, related to the overall and open porosities. As a result, an optimal composition of Ti-40 wt.% TiH{sub 2} was defined, as its maximum open porosity was about 23%.

36 MATERIALS SCIENCE↗
DOE OSTI2017

Compact FEL-driven inverse compton scattering gamma-ray source

Many research and applications areas require photon sources capable of producing gamma-ray beams in the multi-MeV energy range with reasonably high fluxes and compact footprints. Besides industrial, nuclear physics and security applications, a considerable interest comes from the possibility to assess the state of conservation of cultural assets like statues, columns etc., via visualization and analysis techniques using high energy photon beams. Computed Tomography scans, widely adopted in medicine at lower photon energies, presently provide high quality three-dimensional imaging in industry and museums. We explore the feasibility of a compact source of quasi-monochromatic, multi-MeV gamma-rays based on Inverse Compton Scattering (ICS) from a high intensity ultra-violet (UV) beam generated in a free-electron laser by the electron beam itself. This scheme introduces a stronger relationship between the energy of the scattered photons and that of the electron beam, resulting in a device much more compact than a classic ICS for a given scattered energy. As a result, the same electron beam is used to produce gamma-rays in the 10–20 MeV range and UV radiation in the 10–15 eV range, in a ~4 × 22 m 2 footprint system.

43 PARTICLE ACCELERATORS↗
DOE OSTI2015

Laser scanner data processing and 3D modeling using a free and open source software

The laser scanning is a technology that allows in a short time to run the relief geometric objects with a high level of detail and completeness, based on the signal emitted by the laser and the corresponding return signal. When the incident laser radiation hits the object to detect, then the radiation is reflected. The purpose is to build a three-dimensional digital model that allows to reconstruct the reality of the object and to conduct studies regarding the design, restoration and/or conservation. When the laser scanner is equipped with a digital camera, the result of the measurement process is a set of points in XYZ coordinates showing a high density and accuracy with radiometric and RGB tones. In this case, the set of measured points is called “point cloud” and allows the reconstruction of the Digital Surface Model. Even the post-processing is usually performed by closed source software, which is characterized by Copyright restricting the free use, free and open source software can increase the performance by far. Indeed, this latter can be freely used providing the possibility to display and even custom the source code. The experience started at the Faculty of Engineering in Catania is aimed at finding a valuable free and open source tool, MeshLab (Italian Software for data processing), to be compared with a reference closed source software for data processing, i.e. RapidForm. In this work, we compare the results obtained with MeshLab and Rapidform through the planning of the survey and the acquisition of the point cloud of a morphologically complex statue.

71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSIC↗
DOE OSTI2015

De Minimis Thresholds for Federal Building Metering Appropriateness

The U.S. Department of Energy (DOE) is required by statute and Presidential Memorandum to establish guidelines for agencies to meter their Federal buildings for energy (electricity, natural gas, and steam) and water. See 42 U.S.C. § 8253(e). DOE issued guidance in February 2006 on the installation of electric meters in Federal buildings. A recent update to the 2006 guidance accounts for more current metering practices within the Federal Government. The updated metering guidance specifies that all Federal buildings shall be considered “appropriate” for energy or water metering unless identified for potential exclusion. In developing the updated guidance to carry out the statue, Congress also directed DOE to (among other things) establish exclusions from the metering requirements based on the de minimis quantity of energy use of a Federal building, industrial process, or structure. This paper discusses the method used to identify de minimis values.

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATI↗
DOE OSTI2020

Closure Report for the Project Shoal Area: Subsurface Corrective Action Unit 447 Shoal,Nevada, Site

The U.S. Department of Energy (DOE) Office of Legacy Management (LM) has prepared this Closure Report for subsurface Corrective Action Unit (CAU) 447 at the Shoal, Nevada, Site, which was formerly called the Project Shoal Area. The Shoal site was the location of an underground nuclear test in 1963 that resulted in residual radionuclide contamination at the detonation depth of 1211 feet (ft) (DOE 2015a). The environmental restoration process and Corrective Action strategy are conducted in accordance with the Federal Facility Agreement and Consent Order (FFACO) (FFACO 1996, as amended) and all applicable Nevada Division of Environmental Protection (NDEP) statues and regulations. Responsibility for the environmental site restoration was transferred from the DOE, National Nuclear Security Administration, Nevada Field Office, to LM on October 1, 2006. The Shoal site is south of U.S. Highway 50, approximately 30 miles southeast of Fallon, in Churchill County, Nevada (Figure 1). The site was selected for underground nuclear testing in 1961, as part of the Vela Uniform Program. Vela was a research and development program directed toward locating, detecting, and identifying underground and high-altitude nuclear detonations. The Vela Uniform program was specific to underground detonations (AEC 1964). The objective of Project Shoal was to detonate a nuclear device underground in an active seismic area to improve the United States’ ability to detect, identify, and locate underground nuclear detonations. The underground nuclear test at Shoal was a joint effort between the U.S. Department of Defense (DOD) and the U.S. Atomic Energy Commission (AEC), which was the predecessor agency to DOE. Figure 1 is a map showing the site location.

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS↗
DOE OSTI2024

Hidden in Plain Sight How Interior Furnishings Management Can Help Los Alamos National Laboratory Meet the United States Department of Energy's Sustainability Goals [Slides]

Annually close to 50,000 lbs. of furniture avoids landfills through this program. Over a ten year (2020-2030) over 224 tons of furniture will avoid landfills through the program, that is the weight of the Statue of Liberty. The ReUse program saves LANL $\$172,875$ annually based on the salvage value of the furniture. If the product reused were to be purchased new, LANL would spen close to $1,200,000.

99 GENERAL AND MISCELLANEOUS↗
DOE OSTI2020

What Should Health Departments Do with HIV Sequence Data?

Many countries and US states have mandatory statues that require reporting of HIV clinical data including genetic sequencing results to the public health departments. Because genetic sequencing is a part of routine care for HIV infected persons, health departments have extensive sequence collections spanning years and even decades of the HIV epidemic. How should these data be used (or not) in public health practice? This is a complex, multi-faceted question that weighs personal risks against public health benefit. The answer is neither straightforward nor universal. However, to make that judgement—of how genetic sequence data should be used in describing and combating the HIV epidemic—we need a clear image of what a phylogenetically enhanced HIV surveillance system can do and what benefit it might provide. In this paper, we present a positive case for how up-to-date analysis of HIV sequence databases managed by health departments can provide unique and actionable information of how HIV is spreading in local communities. We discuss this question broadly, with examples from the US, as it is globally relevant for all health authorities that collect HIV genetic data.

60 APPLIED LIFE SCIENCES↗
DOE OSTI2018

Regulatory Framework for Permanent Shut-down and Decommissioning of Nuclear Power Plant in Korea - 18101

Kori Unit 1, the first commercial NPP in Korea which was commissioned in 1978, was put on permanent shutdown for decommissioning on June 2017, after 40 years of operation. For permanent shutdown of the Kori Unit 1, an operation change permit was submitted in 2016 prior to the expiration since the NSA (Nuclear Safety Act) recognizes permanent shutdown as one of the operation stage. In preparation for the decommissioning of Kori Unit 1, the NSA related to decommissioning was revised and promulgated in 2015. The lower statues including Enforcement Decree and Regulation of the NSA, etc. were promptly revised to reflect decommissioning related requirements and procedures accordingly. For new NPPs, preliminary decommissioning plan is submitted and is being reviewed in the course of license review. Operating NPPs are also planning to submit the decommissioning plan by 2018 and receive approvals from Nuclear Safety and Security Commission. In case that an operator intends to decommission a nuclear installation, the operator shall apply for decommissioning and receive an approval from the NSSC. As discussed, framework for permanent shutdown and decommissioning of nuclear facilities have been well formatted by successful revision of NSA in Korea. Further detailed technical standards and regulatory guides on decommissioning will be developed to facilitate the relevant activities and ensure the nuclear safety. (authors)

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE W↗
DOE OSTI2014

The research progress of some key problems about the protection of industrial electron irradiation accelerator - Paper 9

In the last decades, electronic irradiation accelerator has made great progress and been widely used in fields. Because of its distinguishing feature of reliability and safety, electronic irradiation accelerator has attracted more attention of the investors, and created a huge economic value and social benefits. It will become the mainstream equipment of irradiation processing industry in future. So the further study of the shielding design around irradiation accelerator is of great significance. Different designs of ventilation duct will greatly influence dose rate of the exit. Because of the high dose rate under the target, it is suitable to use multi-tortuous duct when duct locating under target. It will reduce the dose rate about 3 orders of magnitude at the exit that add one backscattering interface in duct. Choose reasonable diameter and angle of embedded duct so that photons scatter as much as possible. We can use multiple small diameter ducts to replace large diameter duct. The system of Mini-DDL, Gamma detector and PC give a better reflection on the running statue of accelerator, its perfect usability can produce intuitive images for analyzed, it is important and helpful for workers and researchers to know about the radiation level of machine and environment. The measured results along the maze show that the maze must be long enough in order to achieve the desired shielding thickness. In future, we will combine the different kinds and motor patterns of body models, Monte Carlo programs, real time monitoring system with theoretical calculations to explore how the radiation field around accelerator has impact on human organs, get the dose distribution of body models so that improve the radiation protection to electron accelerator. (authors)

43 PARTICLE ACCELERATORS↗