FLUXNET-CH4 MY-MLM Maludam National Park
This is the FLUXNET-CH4 version of the carbon flux data for the site MY-MLM Maludam National Park.
Wong, Guan Xhuan↗
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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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US-DOE and Republic of South Africa Uranium Benchmarking: Results From Los Alamos National Laboratory (Study Report)
This report details work performed at Los Alamos National Laboratory (LANL) in support of an interlaboratory uranium (U) benchmarking collaboration between LANL, Lawrence Livermore National Laboratory (LLNL), and South African Nuclear Energy Corporation (Necsa). The goal of this interlaboratory benchmarking exercise is to compare analytical methods and data obtained on uranium reference materials CUP-2 and New Brunswick Laboratory (NBL) certified reference material (CRM) 124-2. The LANL commitments for this project include performing microwave digestion of fresh CUP-2 and CRM 124-2 powders, measuring the U isotope composition of CUP-2 and CRM 124-2 by both single-collector and multi-collector inductively coupled plasma mass spectrometry (SC-ICP-MS and MC-ICP-MS, respectively), and determining trace-element abundances in CUP-2 and CRM 124-2 by inductively coupled plasma mass spectrometry (ICP-MS). This report details the methods employed by LANL in support of these objectives and presents the data obtained during this collaborative exercise.
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEA↗
Utility of Sr and Nd isotope signatures in U ores and UOCs [Slides]
Abstract not provided.
07 ISOTOPE AND RADIATION SOURCES↗
NA-22 IAP Review: ATONA Project [Slides]
The ATONA technology has the potential to impact measurement capabilities in the broad field nuclear forensics, and not just for uranium. We remain cautiously optimistic that we can develop ATONA based environmental measurement techniques that will be of use to some of our partners.
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗
Instruments, Forensics, Turtles & Hot Sauce: The Role of an Isotope Geochemist at LANL [Slides]
Abstract not provided.
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEA↗
Highly sensitive isotope ratio measurements in support of nuclear non-proliferation, safeguards and nuclear forensics programs [Slides]
Abstract not provided.
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL P↗
Nuclear Forensics: Identification and Characterization of Materials Outside of Regulatory Control [Slides]
Nuclear forensics is the collection and analysis of nuclear or radiological material to support investigations into the diversion, trafficking, or illicit activities involving materials. The goal is to link nuclear or radioactive material to people, processes, events and/or locations.
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL P↗
Sr Chemistry for Uranium Ore Concentrates [Slides]
Abstract not provided.
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS↗
Homogeneity, Heterogeneity and Uncertainty in Epic Shadow exercises [Slides]
High precision analyses demonstrate the ability to measure very small differences between sample aliquots. Is it appropriate for us to assume a homogenous sample in ES exercises? When running aliquots in triplicate should the data be averaged? If averaged what uncertainty should be applied, and what does the uncertainty describe? What is the most appropriate uncertainty to apply on single measurements?
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEA↗
Instruments, Forensics, Turtles & Hot Sauce: The Role of an Isotope Geochemist at LANL [Slides]
Abstract not provided.
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEA↗
Np-237 LoD Measurement by TIMS-Multi-Ion Counting Total Evaporation [Poster]
Requests for ultra-low-level 237 Np analyses highlight the importance of a robust chemical purification and measurement technique for Np. In FY2022, LANL is quantifying the instrumental 237 Np LoD. Need to incorporate a chemical purification procedure for TIMS-MICTE sample preparation. What is the recovery of the chemical purification procedure? What is the ultimate detection limit that can be achieved while incorporating a chemical purification procedure? We have adapted and refined the Pu TIMS-MICTE method for Np analyses. We have determined expected uncertainties for 237 Np TIMS-MICTE measurements. We have increased sensitivity through technique improvements. We have improved method reliability for Np analyses and increased throughput. Apply knowledge gained from progress made in FY2022 to further develop Np sample purification and analyses by TIMSMICTE.
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
Forensics, Instruments, Turtles & Hot Sauce: The Role of an Isotope Geochemist at LANL [Slides]
Measurable quantities of U in Turtle and Tortoise scute. Turtle samples from areas of known history of radionuclide releases found to have non-natural U isotope signatures. These signatures match what we know about the release of uranium radionuclides at each site. Able to determine quantifiable changes in the U concentration and isotope composition along individual layers of growth (representing seven years of life). Possible correlations with historical releases of U from Oak Ridge site.
54 ENVIRONMENTAL SCIENCES↗
ATONA Update [Slides]
The new ATONA amplifier, a Faraday Cup High Gain Resistor Amplifier, is described.
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEA↗
Measurement capabilities at LANL for pre- and post-detonation nuclear forensics [Slides]
The role of Los Alamos across the Pre- and Post Detonation Spectrum
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEF↗
Forensics, Instruments, Chronometry & Turtles: The Role of an Isotope Geochemist at LANL [Slides]
Abstract not provided.
07 ISOTOPE AND RADIATION SOURCES↗
Nuclear Forensics: Identification and Characterization of Materials Outside of Regulatory Control [Slides]
Nuclear forensics is the collection and analysis of nuclear or radiological material to support investigations into the diversion, trafficking, or illicit activities involving materials. The goal is to link nuclear or radioactive material to people, processes, events and/or locations.
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL P↗
Utility of ATONA amplifiers for pre- and post-det nuclear forensic isotope measurements by thermal ionization mass spectrometry [Slides]
Three important upgrades provide unsurpassed TIMS measurement capabilities 1. HI-VAC (installed 5 of 7 instruments) 2. ATONA Faraday amplification (2 of 7 instrument) 3. Multiple ion-counting system for ultra-low level detection (installed 4 of 7 instruments).
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEF↗
Dynamics of Water, Climate, and Infrastructure
Climate and its impacts on the natural environment, and on the ability of the natural environment to support population and the built environment, stands as a threat multiplier that impacts national and global security. The Water Intersections with Climate Systems Security (WICSS) Strategic Initiative is designed to improve understanding of water’s role in, among other topics, the connection of critical infrastructure to climate in light of competing national and global security interests (including transboundary issues and stability), and identifying research gaps aligned with Sandia, and Federal agency priorities. With this impetus in mind, the WICSS Strategic Initiative team conceptualized a causal loop diagram (CLD) of the relationship between and among climate, the natural environment, population, and the built environment, with an understanding that any such regionally focused system must have externalities that influence the system from beyond its’ control, and metrics for better understanding the consequences of the set of interactions. These are discussed in light of a series of worldviews that focus on portions of the overall systems relationship. The relationships are described and documented in detail. A set of reinforcing and balancing loops are then highlighted within the context of the model. Finally, forward-looking actions are highlighted to describe how this conceptual model can be turned into modeling to address multiple problems described under the purview of the Strategic Initiative.
54 ENVIRONMENTAL SCIENCES↗