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Multiradionuclide evidence for an extreme solar proton event around 2,610 BP (similar to 660 BC) 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (13) : 5961-5966
作者:  O&;  39;Hare, Paschal
收藏  |  浏览/下载：2/0  |  提交时间：2019/11/27
solar storms  radionuclides  ice cores  solar proton events  
Microbiological-enhanced mixing across scales during in-situ bioreduction of metals and radionuclides at Department of Energy Sites 科技报告
来源：US Department of Energy (DOE). 出版年： 2015
作者:  Valocchi, Albert;  Werth, Charles;  Liu, Wen-Tso;  Sanford, Robert;  Nakshatrala, Kalyan
收藏  |  浏览/下载：1/0  |  提交时间：2019/04/05
groundwater  metals  radionuclides  dissimilatory metal reduction  micro-fluidics  pore-scale modeling  hybrid modeling  
Updating LANL’s Ambient Air Monitoring Network (Airnet) 科技报告
来源：US Department of Energy (DOE). 出版年： 2015
作者:  Fuehne, David Patrick;  Allen, Shannon Purdue
收藏  |  浏览/下载：4/0  |  提交时间：2019/04/05
Air quality  Airnet, ambient air monitoring, radionuclides  
Tonopah Test Range Air Monitoring: CY2013 Meteorological, Radiological, and Airborne Particulate Observations 科技报告
来源：US Department of Energy (DOE). 出版年： 2014
作者:  Mizell, Steve A;  Nikolich, George;  Shadel, Craig;  McCurdy, Greg;  Etyemezian, Vicken;  Miller, Julianne J
收藏  |  浏览/下载：9/0  |  提交时间：2019/04/05
In 1963  the U.S. Department of Energy (DOE) (formerly the Atomic Energy Commission [AEC])  implemented Operation Roller Coaster on the Tonopah Test Range (TTR) and an adjacent area of the Nevada Test and Training Range (NTTR) (formerly the Nellis Air Force Range). This test resulted in radionuclide-contaminated soils at Clean Slate I  II  and III. This report documents observations made during on-going monitoring of radiological  meteorological  and dust conditions at stations installed adjacent to Clean Slate I and Clean Slate III and at the TTR Range Operations Control center. The primary objective of the monitoring effort is to determine if winds blowing across the Clean Slate sites are transporting particles of radionuclide-contaminated soils beyond both the physical and administrative boundaries of the sites. Results for the calendar year (CY) 2013 monitoring include: (1) the gross alpha and gross beta values from the monitoring stations are approximately equivalent to the highest values observed during the CY2012 reporting at the surrounding Community Environmental Monitoring Program (CEMP) stations (this was the latest documented data available at the time of this writing)  (2) only naturally occurring radionuclides were identified in the gamma spectral analyses  (3) the ambient gamma radiation measurements indicate that the average annual gamma exposure is similar at all three monitoring stations and periodic intervals of increased gamma values appear to be associated with storm fronts passing through the area  and (4) the concentrations of both resuspended dust and saltated sand particles generally increase with increasing wind speed. However  differences in the observed dust concentrations are likely due to differences in the soil characteristics immediately adjacent to the monitoring stations. Neither the resuspended particulate radiological analyses nor the ambient gamma radiation measurements suggest wind transport of radionuclide-contaminated soils.  
Radiological and Environmental Monitoring at the Clean Slate I and III Sites, Tonopah Test Range, Nevada, With Emphasis on the Implications for Off-site Transport 科技报告
来源：US Department of Energy (DOE). 出版年： 2014
作者:  Mizell, Steve A;  Etyemezian, Vic;  McCurdy, Greg;  Nikolich, George
收藏  |  浏览/下载：10/0  |  提交时间：2019/04/05
In 1963  the U.S. Department of Energy (DOE) (formerly the Atomic Energy Commission [AEC]) implemented Operation Roller Coaster on the Tonopah Test Range (TTR) and an adjacent area of the Nevada Test and Training Range (NTTR) (formerly the Nellis Air Force Range [NAFR]). Operation Roller Coaster consisted of four tests in which chemical explosions were detonated in the presence of nuclear devices to assess the dispersal of radionuclides and evaluate the effectiveness of storage structures to contain the ejected radionuclides. These tests resulted in the dispersal of plutonium over the ground surface downwind of the test ground zero (GZ). Three tests—Clean Slate I  II  and III—were conducted on the TTR in Cactus Flat. The fourth  Double Tracks  was conducted in Stonewall Flat on the NTTR.  
Radiochemically-Supported Microbial Communities: A Potential Mechanism for Biocolloid Production of Importance to Actinide Transport 科技报告
来源：US Department of Energy (DOE). 出版年： 2014
作者:  Moser, Duane P;  Hamilton-Brehm, Scott D;  Fisher, Jenny C;  Bruckner, James C;  Kruger, Brittany;  Sackett, Joshua;  Russell, Charles E;  Onstott, Tullis C;  Czerwinski, Ken
收藏  |  浏览/下载：18/0  |  提交时间：2019/04/05
Due to the legacy of Cold War nuclear weapons testing  the Nevada National Security Site (NNSS  formerly known as the Nevada Test Site (NTS)) contains millions of Curies of radioactive contamination. Presented here is a summary of the results of the first comprehensive study of subsurface microbial communities of radioactive and nonradioactive aquifers at this site. To achieve the objectives of this project  cooperative actions between the Desert Research Institute (DRI)  the Nevada Field Office of the National Nuclear Security Administration (NNSA)  the Underground Test Area Activity (UGTA)  and contractors such as Navarro-Interra (NI)  were required. Ultimately  fluids from 17 boreholes and two water-filled tunnels were sampled (sometimes on multiple occasions and from multiple depths) from the NNSS  the adjacent Nevada Test and Training Range (NTTR)  and a reference hole in the Amargosa Valley near Death Valley. The sites sampled ranged from highly-radioactive nuclear device test cavities to uncontaminated perched and regional aquifers. Specific areas sampled included recharge  intermediate  and discharge zones of a 100  000-km2 internally-draining province  known as the Death Valley Regional Flow System (DVRFS)  which encompasses the entirety of the NNSS/NTTR and surrounding areas. Specific geological features sampled included: West Pahute and Ranier Mesas (recharge zone)  Yucca and Frenchman Flats (transitional zone)  and the Western edge of the Amargosa Valley near Death Valley (discharge zone). The original overarching question underlying the proposal supporting this work was stated as: Can radiochemically-produced substrates support indigenous microbial communities and subsequently stimulate biocolloid formation that can affect radionuclides in NNSS subsurface nuclear test/detonation sites? Radioactive and non-radioactive groundwater samples were thus characterized for physical parameters  aqueous geochemistry  and microbial communities using both DNA- and cultivation-based tools in an effort to understand the drivers of microbial community structure (including radioactivity) and microbial interactions with select radionuclides and other factors across the range of habitats surveyed.  
Water-Chemistry Evolution and Modeling of Radionuclide Sorption and Cation Exchange during Inundation of Frenchman Flat Playa 科技报告
来源：US Department of Energy (DOE). 出版年： 2013
作者:  Hershey, Ronald;  Cablk, Mary;  LeFebre, Karen;  Fenstermaker, Lynn;  Decker, David
收藏  |  浏览/下载：3/0  |  提交时间：2019/04/05
Atmospheric tests and other experiments with nuclear materials were conducted on the Frenchman Flat playa at the Nevada National Security Site  Nye County  Nevada  residual radionuclides are known to exist in Frenchman Flat playa soils. Although the playa  
Data Report: Meteorological and Evapotranspiration Data from Sagebrush and Pinyon Pine/Juniper Communities at Pahute Mesa, Nevada National Security Site, 2011-2012 科技报告
来源：US Department of Energy (DOE). 出版年： 2013
作者:  Jasoni, Richard L [DRI];  Larsen, Jessica D [DRI];  Lyles, Brad F. [DRI];  Healey, John M [DRI];  Cooper, Clay A [DRI];  Hershey, Ronald L [DRI];  Lefebre, Karen J [DRI]
收藏  |  浏览/下载：7/0  |  提交时间：2019/04/05
Pahute Mesa is a groundwater recharge area at the Nevada National Security Site. Because underground nuclear testing was conducted at Pahute Mesa  groundwater recharge may transport radionuclides from underground test sites downward to the water table  th  
Assessment of the Building 3430 Filtered Exhaust Stack Sampling Probe Location 科技报告
来源：US Department of Energy (DOE). 出版年： 2010
作者:  Glissmeyer, John A.
收藏  |  浏览/下载：0/0  |  提交时间：2019/04/05
stack sampling  effluent air sampling for radionuclides  air sampling