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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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This project represents an initial stage of a continuing program of R&D for high-power neutrino beams. Initial studies of Optical Transition Radiation foil materials were performed, and engineering designs for horn/stripline were done.
Scope of the talk: Disclaimer and practical limitations: This is just a sample of the work from the DOE labs that I am most familiar with and is selection biased. There are a lot of efforts on-going that includes medical applications which is not the focus of this talk. The materials were prepared by each contact at the respective lab who were willing to consolidate the laboratory efforts in this area. If something piques your interest, let me know I will be happy to connect you the right person. Universities, several other agencies, and industries are working on modern machines some of which I am aware of but was not the focus of this talk. Books, national and international conferences, workshops are active on every single topic mentioned here. Please contact me and I will do my best to assist you to the right ones.
Air conditioning (AC) and refrigeration systems account for a large share of today’s global energy consumption, and this demand is expected to increase sharply over the next 50 years unless actions are taken to ameliorate the increase. The adoption of AC in developed countries increased rapidly in the twentieth century, and the twenty-first century is expected to see increased adoption in developing countries—especially those with hotter climates and large, growing populations, such as India, China, Brazil, and Middle Eastern and African nations. The International Energy Agency (IEA) projects that by 2050, AC energy consumption levels will increase by 4.3 times over the 2010 levels for non-Organization of Economic Coordination and Development (OECD) countries vs. only 1.5 times for OECD countries (Figure 1).
The Statement of Work (SOW) for this activity involved three main tasks. (1) Carry out an international survey to construct a comprehensive list of safety related experimental programs that have been and are important contributors to the safety assessments for nuclear installations. Furthermore, this survey also served to collect the views of many scientists and engineers, who have been in nuclear safety for many decades, regarding the experimental programs for which there is the most immediate need to archive the experimental data. (2) Perform a search for possible sources (libraries, experimental data bases, etc.) that may contain relevant information for one, or more of the three important, and expensive experiments initially identified as key experimental information to be preserved (LOFT, Marviken, HDR). The information gathered includes experimental test reports, peer reviewed technical papers, articles prepared for technical meetings that were not peer reviewed and papers that were written for specialist meetings but which did not have a peer review, all of which help to provide insights on the experiments of interest. (3) Provide a demonstration of how the archival status of three of the most important experimental programs can be characterized and archived for the different levels of experimental documentation that might be found for each of the three experimental programs selected for the demonstration.
Summary statement of work: Develop a signal pulse digital signing and encryption in-line device to verify signal integrity and point of origin for TTL pulse data used in IAEA systems, and to avoid the need for expensive tamper-indicating conduit or techniques. This device will be called Transparent Remote Encryption of Correlated Signals (TRECS). TRECS consists of two parts, a head end which is located in or near the detector assembly and a tail end that is located with the data acquisition electronics, i.e. MiniGrand, UMSR, UDL1 or JSR.
The program’s focus was to evaluate, advance, and demonstrate recuperator design concepts, materials, and fabrication methods that facilitate the commercial availability of compact and low-cost recuperators. Emphasis was placed on recompression closed Brayton cycles having a turbine inlet temperature exceeding 700°C and differential pressures on the order of 200 bar and were scalable to accommodate plant sizes from 10 to 1,000 MWe. The primary objectives of the first budget period, which included conceptual design, preliminary development, and prototype fabrication and testing, were accomplished. A new recuperator design concept, stacked-sheet heat exchanger (SSHX), was realized during the project. The design was taken from paper to hardware and successfully tested. The SSHX prototype recuperator met or exceeded program thermal, hydraulic and performance/cost metrics goals. The first budget period was extended to retire risk in scaling the recuperator from the kWt to MWt thermal capacity scale. The fabrication and design requirements for the budget period one extension were met. Delays associated with the Covid-19 pandemic prevented the fabrication and testing of the industrial scale prototype.
This limited scope study aims at preserving the results of experimental programs for the safety of light water cooled and advanced reactors by locating and documenting, to the extent possible, where the experimental test information for these programs has been archived. The Light Water Reactor Data Preservation Activity Team initially identified seven (7) experimental programs, exceeding the required five (5) in the scope of work, which were determined to be “at risk” of potentially losing valuable data. The seven (7) experimental programs/subject areas identified are (descriptions of each experiment/experience are provided in Section 3.0): 1. FERMI-1 Reactor Accident 2. Fission Product Behavior During the In-Pile Severe Fuel Damage Test SFD I-4 3. Containment Iodine Computer Code Exercise Based on Radioiodine Test Facility (RTF) Experiment 4. Wide Range Piping Integrity Demonstration (WIND) Project 5. Iodine Chemical Research in Canada 6. High Temperature Fission Product Chemistry and Transport in Steam 7. Anything related to radioactive Methyl Iodide.
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This is the third phase of a work scope which has been focused on providing a framework for and preserving key experimental programs and experiences which are critical to the licensing basis of currently operating nuclear reactors or which could be used in the safety basis for the next generation of reactors. The first phase of this effort, documented in Reference 1, focused on compiling a list of key experimental programs through an international survey of reactor safety professionals working in licensing, design, and academia. The second phase in this effort, documented in Reference 2, focused on creating a searchable database framework in which to organize the results from the international survey and to perform detailed research on several key programs to provide the framework for how to categorize the references which could be located. The purpose of the third phase is to perform a high-level research effort on each experiment/experience and to determine if sufficient data, reports, and results have already been captured to consider the program archived for future generators of nuclear professionals.
Baking Rexolite removes gases trapped on the surface and in the bulk material, reduces outgassing, and reduces gas load inside the vacuum system. Outgassing performance degrades over time for samples exposed to ambient air and dry nitrogen. Longer vacuum storage leads to lower outgassing rates in the observed time frame.
Four tasks are reported on for the midyear 2022 report.
A suite of sensor packages has been installed in the Alpha-4 facility at Y-12 and preliminary data analysis to isolate the controlling variables has been performed after two months of data collection. In line with the conceptual model presented in Section 2.0, the preliminary analysis has demonstrated that temperature, barometric pressure, and relative humidity are the key controlling variables for mercury vapor releases within the building. The data analysis will continue to explore these controlling variables across the next several months to capture a more complete picture of the annual change in meteorological conditions at Y-12.
The overall objective of this program is to achieve ≥ 22.5 % bifacial p-type cell efficiencies by developing and implementing optimized homogeneous phosphorus (P) emitter on the front and tunnel oxide passivated boron (B) doped poly-Si contact (p-TOPCon) on the rear side, in combination with advanced fine-line screen-printing metallization and high bulk lifetime in the base material.
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Abstract not provided.