Study on application of kriging to evaluation of radioactivity concentration for ensuring compliance with the criterion of site release

2015 ◽  
Vol 52 (9) ◽  
pp. 1186-1204
Author(s):  
Tsutomu Ishigami ◽  
Taro Shimada
Keyword(s):  
Radioactivity Concentration ◽  
Site Release

scholarly journals Study and Search for Main Reason of Lung Cancers Based on Cherenkov Radiation in Environmental Radiation

2018 ◽  
Vol 170 ◽  
pp. 09006 ◽  
Author(s):  
Hiroshi Ito ◽  
Yusaku Emoto ◽  
Kento Fujihara ◽  
Hideyuki Kawai ◽  
Shota Kimura ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Cherenkov Radiation ◽  
Causal Relation ◽  
Population Aging ◽  
Maximum Energy ◽  
Radioactivity Concentration ◽  
Environmental Radiation ◽  
Lung Cancers ◽  
The World ◽  
Radon Decay

The number of lung-cancer-related death is highest among all cancers in the world, and it is increasing in Japan where population aging in progressing. The main reason for the lung cancer of non-smokers is regarded to be environmental pollution or exposure of the lung to radon in the nature. The risk of lung cancer was estimated to increase by 8 to 13% per every 100 Bq m-3 concentration of radon in the air. We observed beta rays with maximum energy of 3.27 MeV emitted from 214Bi as one of the progenies based on a detection of Cherenkov radiation. The surface radioactivity concentration of 214Bi on the sample was measured; the relation between the concentration and exposure time for the sample at the room air is researched. The behavior of the radon progenies in the air is discussed by a research for the progenies attaching on the sample after the radon decay. The inhalation of the radon progenies is not clear. Thus, to understand the behavior of progenies in the air make to clear the causal relation between the radon concentration and lung cancers.

scholarly journals A phosphoinositide-binding cluster in cavin1 acts as a molecular sensor for cavin1 degradation

2015 ◽  
Vol 26 (20) ◽  
pp. 3561-3569 ◽  
Author(s):  
Vikas A. Tillu ◽  
Oleksiy Kovtun ◽  
Kerrie-Ann McMahon ◽  
Brett M. Collins ◽  
Robert G. Parton
Keyword(s):  
Proteasomal Degradation ◽  
Resting Cells ◽  
Coat Proteins ◽  
Cellular Processes ◽  
Molecular Sensor ◽  
Lysine Residues ◽  
Low Levels ◽  
Membrane Stretching ◽  
Signaling Modules ◽  
Site Release

Caveolae are abundant surface organelles implicated in a range of cellular processes. Two classes of proteins work together to generate caveolae: integral membrane proteins termed caveolins and cytoplasmic coat proteins called cavins. Caveolae respond to membrane stress by releasing cavins into the cytosol. A crucial aspect of this model is tight regulation of cytosolic pools of cavin under resting conditions. We now show that a recently identified region of cavin1 that can bind phosphoinositide (PI) lipids is also a major site of ubiquitylation. Ubiquitylation of lysines within this site leads to rapid proteasomal degradation. In cells that lack caveolins and caveolae, cavin1 is cytosolic and rapidly degraded as compared with cells in which cavin1 is associated with caveolae. Membrane stretching causes caveolar disassembly, release of cavin complexes into the cytosol, and increased proteasomal degradation of wild-type cavin1 but not mutant cavin1 lacking the major ubiquitylation site. Release of cavin1 from caveolae thus leads to exposure of key lysine residues in the PI-binding region, acting as a trigger for cavin1 ubiquitylation and down-regulation. This mutually exclusive PI-binding/ubiquitylation mechanism may help maintain low levels of cytosolic cavin1 in resting cells, a prerequisite for cavins acting as signaling modules following release from caveolae.

scholarly journals Development of a Depth Distribution Monitor of Radioactivity Concentration in the Soil

2015 ◽  
Vol 50 (1) ◽  
pp. 94-95 ◽  
Author(s):  
Akihito HORA ◽  
Minoru IMAI ◽  
Tomoya NUNOMIYA ◽  
Takeshi ISHIKURA ◽  
Masashi TAKADA ◽  
...  
Keyword(s):  
Depth Distribution ◽  
Radioactivity Concentration

The Statistical Analysis of the Radioactivity Concentration of the Water Data in Malatya City, Turkey

2005 ◽  
pp. 865-871
Author(s):  
Mahmut Doğru ◽  
Mesut Yalçin ◽  
Fatih Külahci ◽  
Cumhur Canbazoğlu ◽  
Oktay Baykara
Keyword(s):  
Statistical Analysis ◽  
Radioactivity Concentration

scholarly journals Comparative Analysis of Probabilistic Analysis and Deterministic Analysis by RESRAD Code

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1983
Author(s):  
Sang June Park ◽  
Jihyang Byon ◽  
Seokyoung Ahn
Keyword(s):  
United States ◽  
Comparative Analysis ◽  
South Korea ◽  
Probabilistic Analysis ◽  
The United States ◽  
Exposure Dose ◽  
Nuclear Facilities ◽  
Deterministic Analysis ◽  
Specific Concentration ◽  
Site Release

The decommissioning of nuclear facilities indicates that the site is finally released according to a limited or unlimited site reuse purpose. In this process, the assessment of exposure dose to decommissioning workers and nearby residents is essential. Based on MARSSIM, a widely used decommissioning guideline in the United States, derivation of the exposure dose and derived concentration guideline level (DCGL) is mandatory using the probabilistic analysis of the RESRAD code. Here, DCGL is the radionuclide-specific concentration that satisfies the site release criteria. By applying the priority 1 parameter, which has the greatest effect on the dose, the dose is derived through deterministic and probabilistic analyses. The results were compared and analyzed. The purpose of this study was to provide a basic database that can be applied to the development of parameter lists and distributions suitable for the characteristics of nuclear facilities in South Korea. In addition, the process of deriving the dose by applying the deterministic and probabilistic analyses of RESRAD was assessed.

scholarly journals Radioactivity concentration and heavy metal content in fuel oil and oil-ashes in Venezuela

2005 ◽  
Vol 40 ◽  
pp. S183-S189 ◽  
Author(s):  
H. Barros ◽  
L. Sajo-Bohus ◽  
J. M. Abril ◽  
E. D. Greaves
Keyword(s):  
Heavy Metal ◽  
Metal Content ◽  
Heavy Metal Content ◽  
Fuel Oil ◽  
Radioactivity Concentration
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