cesium 137 migration

Caesium-137 - Wikipedia

Caesium-137 (137 55 Cs), or radiocaesium, is a radioactive isotope of caesium that is formed as one of the more common fission products by the nuclear fission of uranium-235 and other fissionable isotopes in nuclear reactors and nuclear weapons.Trace quantities also originate from natural fission of uranium-238.It is among the most problematic of the short-to-medium-lifetime fission products ...

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External Cesium-137 doses to humans from soil influenced ...

The absorbed doses by gamma-photon radiation were from cesium-137 (137Cs) in soil contaminated by the two major NPP accidents. ... The 137 Cs vertical migration is …

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Radionuclide Basics: Cesium-137 | US EPA

Cesium-137 is an especially dangerous fission product because of its high yield during fission, moderate half-life, high-energy decay pathway, and chemical reactivity. Because of these properties, cesium-137 is a major contributor to the total radiation released during nuclear accidents. Finally, a discussion of its practical applications is ...

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CDC Radiation Emergencies | Radioisotope Brief: Cesium-137 ...

Small amounts of Cs-137 are incorporated into Lucite disks, rods, and seeds. Larger Cs-137 sources are enclosed in lead containers (such as long tubes that are closed at each end) or small round metal containers. If the lead containers of Cs-137 are opened, the …

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Analysis of Accumulation Factor of Cesium 137 in Bottom ...

With a reference to cesium 137 the calculated factor value is found for silty sediments in rivers and water bodies under characteristic summertime parameters of migration.

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Radionuclide Basics: Cesium-137 | US EPA

Radionuclide Basics: Cesium-137. Cesium (chemical symbol Cs) is a soft, flexible, silvery-white metal that becomes liquid near room temperature, but easily bonds with chlorides to create a crystalline powder. The most common radioactive form of cesium is Cs-137. Cesium-137 …

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Estimation of cesium-137 migration intensity in typical ...

The research results of vertical "1"3"7Cs migration in four types of soils specific to the Republic of Belarus are presented. It is shown that after 20 years of the Chernobyl accident diffusion is still the dominating mechanism of vertical migration as it was in th

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(PDF) Detecting pan-Atlantic migration in salmon ( Salmo ...

Based on Caesium-137 ( 137 Cs) ... The timing of the seaward migration of Atlantic salmon, Salmo salar, of different ages, sizes and sexes, and the return migration of the same groups to coastal ...

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Factors controlling dissolved 137 Cs activities in coastal ...

Spatiotemporal distribution of riverine suspended particles and radioactive cesium in the riverâ€"coastal system on the eastern side of Japan 3.1.1 Kido, Fujiwara, and Same rivers and their nearshore and offshore waters The temporal changes of concentrations of suspended particles (SP), activities of 137 Cs in SP, particulate and dissolved ...

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Cesium-137 | Cs - PubChem

Cesium Cs 137 is a radioactive isotope of cesium with an atomic mass of 139 and potential application in radiotherapy. Cesium Cs 137 is prevalent due to its spontaneous production, which occurs as a result of nuclear fission of other radioactive materials, such as uranium and plutonium.This radionuclide has a relatively long half-life, 30 years, and decays by emitting beta particles.

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Radioaktivität in Böden: Cäsium 137 Belastung in Deutschland

Caesium-137 (137 55 Cs), or radiocaesium, is a radioactive isotope of caesium that is formed as one of the more common fission products by the nuclear fission of uranium-235 and other fissionable isotopes in nuclear reactors and nuclear weapons.Trace quantities also originate from natural fission of uranium-238.It is among the most problematic of the short-to-medium-lifetime fission products.

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Radiocesium migration in the litter layer of different ...

Cesium-137 (137 Cs) migration in the litter layer consists of various processes, such as input via throughfall, output via litter decomposition, and input from deeper layers via soil organism activity.We conducted litter bag experiments over 2 years (December 2014-November 2016) to quantify the inputs and outputs of 137 Cs in the litter layer in a Japanese cedar plantation (Cryptomeria ...

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Successful Migration from Radioactive Irradiators to X-ray ...

The results from comparison studies were promising, which led to the decision of permanent migration of all cesium irradiators to x-ray irradiators. As of January 2018, Mount Sinai successfully disposed all its 137 Cs irradiators. At this time, Mount Sinai, as one of the largest health care institutions in NY with about 50,000 employees, has ...

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Continuous nitrogen fertilization retards the vertical ...

Continuous nitrogen fertilization retards the vertical migration of Fukushima nuclear accident-derived cesium-137 in apple orchard soil. Science of the Total Environment ( IF 7.963) Pub Date :, DOI: 10.1016/j.scitotenv.2020.138903

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Radioaktivität in Böden: Cäsium 137 Belastung in Deutschland

Die Migration des Nuklids erfolgte mit der Zeit, durch sukzessive Verlagerung von Cs-137-Ionen aus jedem 2 cm Kompartiment, in das darunter liegende. In der Humusauflage war dabei der Verlust an Aktivität pro Bodenschicht fast immer größer als die …

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Migration Behavior of Radionuclides (60Co, 85Sr and 137Cs ...

Differences of the migration behavior and desorption process for radionuclides (60 Co, 85 Sr and 137 Cs) in aerated sandy soil layer were studied by sprinkle of distilled water into the contaminated soil with above nuclides in column.Influence of difference desorption process on radionuclide migration was examined by changing the volume of distilled water sprinkled like rain on …

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Storage and Migration of Fallout Strontium‐90 and Cesium ...

The vertical migration of 90 Sr and 117 Cs produced by the explosion of the atomic bomb in 1945 was investigated in an unsaturated soil layer in the Nishiyama area of Nagasaki. The in situ migration rates of 90 Sr and 137 Cs were estimated to be 4.2 mm yr −1 and 1.0 mm yr −1, respectively, when the rate of movement of soil water was 2500 mm yr −1.The in situ K d values of 90 Sr and 137 ...

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(PDF) Cesium-137 concentration of soils in Pest County ...

Cesium-137 distribution map of Pest County (Central Hungary) based on the data from the upper 30 cm layer portion only of the 45 SIMS sampling sites (data in Table 1). Cesium-137 values were adjusted for radioactive decay to the year 1992. The 137Cs concentration value of a particular location is indicated by radii and color of location points.

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Cesium (Cs)-137 in Erosion and Deposition Analysis []

Cs-137 is distributed primarily by rainfall, and is readily absorbed by soil. Cesium-137 decays to barium-137 which then decays to a non-radioactive form of barium. Cs-137 has a half-life of 30.17 years. The measure of Cs-137 concentration is the SI …

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Radioactive tuna reveal migration patterns

Fish caught in Californian waters have been shown to have trace amounts of cesium-134 and cesium-137, two of Fukushima's telltale radioactive isotopes. Scientists believe that this discovery ...

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Science of the Total Environment

Continuous nitrogen fertilization retards the vertical migration of Fukushima nuclear accident-derived cesium-137 in apple orchard soil Kaori Matsuokaa,⁎,1, Naoki Moritsukab, Mitsuhiko Nukadac, Mamoru Satoc,2 a Institute of Fruit Tree and Tea Science, National Agriculture and Food Research Organization, Tsukuba 305-8605, Japan b Graduate School of Agriculture, Kyoto University, Kyoto 606 ...

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Washington State Department of Health – Office of ...

Cesium-137 is an artificially produced fission by-product resulting from nuclear bombs, above-ground nuclear testing, nuclear reactor operations and nuclear accidents. Fact Sheet #25 Cesium-137( 137Cs) Page 2 of 3 Cesium-137 is found in the liquid and airborne waste stream of nuclear reactors, but is

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Cesium-137 i aska från förbränning av biobränslen ...

The migration rate depends on the availability. Before caesium-137 in fallout becomes absorbed, it is transported with the water, and this is the reason for the initial rapid penetration into soil on the order of a decimetre. When most of the caesium-137 has become non-exchangeable and mineral, the migration rate may be as low as on the order

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[Migration of sodium, potassium and cesium-137 in the soil ...

1. Gig Sanit. 1988 Apr;(4):18-20. [Migration of sodium, potassium and cesium-137 in the soil-plant chain]. [Article in Russian] Ashkinazi EI.

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Radiocesium migration in the litter layer of different ...

Cesium-137 (137Cs) migration in the litter layer consists of various processes, such as input via throughfall, output via litter decomposition, and input from deeper layers via soil organism activity. We conducted litter bag experiments over 2 years (December 2014-November 2016) to quantify the inputs and outputs of 137Cs in the litter layer in ...

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A Silver (Actually Cesium) Lining: Traces of Fukushima ...

Cesium 137 has a half-life of 30.1 years, cesium 134, 2.1 years. The entire Pacific Ocean basin still holds slightly elevated levels of cesium 137 …

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Continuous nitrogen fertilization retards the vertical ...

Cesium-137 (137 Cs) is a radionuclide with a long half-life ... The average 137 Cs migration rate in the experimental orchard in the five years after the accident was 0.46 cm y −1 in the N plot and 0.86 cm y −1 in the 0 N plot . These rates are comparable to the range of values ...

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Stanford scientist uses Fukushima radiation to reveal ...

Cesium-137 has a half-life of 30 years, so Madigan expects that measurable amounts will be present in tuna, and other species, for at least the next …

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FACT SHEET: EPA FACTS ABOUT CESIUM-137

Cesium-137 is significant because of its prevalence, relatively long half life (30 years), and its potential effects on human health. Cesium-137 emits beta particles as it decays to the barium isotope, Ba-137m (half life = 2.6 minutes). How are people exposed to cesium-137? People may be exposed externally to gamma radiation emitted by cesium ...

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Cesium-137: A Deadly Hazard - Stanford University

Cesium-137 is an especially dangerous fission product because of its high yield during fission, moderate half-life, high-energy decay pathway, and chemical reactivity. Because of these properties, cesium-137 is a major contributor to the total radiation released during nuclear accidents. Finally, a discussion of its practical applications is ...

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Cesium 137 (radiocesium) has a half-life of 30 years

Cesium-137 is a gamma emitter with a half-life of 30.08 years. Cesium is a soft, gold-colored metal with a melting point of 28.5 °C. It has atomic number 55 and a relative atomic mass of 132.9.There are 35 known isotopes of the element cesium: Cesium-114 to Cesium-148 (Seelmann-Eggebert et al. 1981).

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Europium, strontium and cesium migration from the ...

In the present work, the distribution of the radionuclides 137 Cs, 85 Sr and 152 Eu in a solid/aqueous system is investigated, with the aim of improving the ratio of cesium and strontium in the solid phase by keeping the other elements as lanthanides and actinides (europium) in the solid phase as high as possible. Different composites (gypsum ...

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Fukushima Radiation in U.S. West Coast Tuna | NOAA Fisheries

For scientists the 134 Cs and 137 Cs served as a marker indicating migratory pathways. If, for example, a Pacific bluefin tuna had detectable levels of 134 Cs (which decays relatively quickly), it indicated that they recently migrated from Japan. This has provided important insight into the dynamics of tuna migration …

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Journal of Environmental Radioactivity - ELTE

Cesium-137 Distribution Migration Cesium map Chernobyl accident abstract This paper presents theresults of measurements of 137Csin soilsin Pest County, Hungary.Weinvestigated forty five soil monoliths from monitoring locations of a countrywide Soil Information and Monitoring System(SIMS)atdepthsof0e30,30e60,60e90,90e120 and 120 e150cm.

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Role of filamentous fungi in migration of radioactive ...

Role of filamentous fungi in migration of radioactive cesium in the Fukushima forest soil ... the TFs of wild mushroom and those of fungal hyphae of 704 stock strains grown on agar medium containing nutrients and 137 Cs showed that the TFs of wild mushroom were lower. The TF was less than 0.1 after the addition of the minerals zeolite ...

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Cesium-137 deposition and contamination of Japanese soils ...

The largest concern on the cesium-137 (137Cs) deposition and its soil contamination due to the emission from the Fukushima Daiichi Nuclear Power Plant (NPP) showed up after a massive quake on March 11, 2011. Cesium-137 (137Cs) with a half-life of 30.1 y causes the largest concerns because of its deleterious effect on agriculture and stock farming, and, thus, human life for decades.

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Nuclear Fission Fragments - HyperPhysics Concepts

Cesium-137 . An inevitable byproduct of nuclear fission is the production of fission products which are highly radioactive. Cesium-137 and strontium-90 are the most dangerous radioisotopes to the environment in terms of their long-term effects. Their intermediate half-lives of about 30 years suggests that they are not only highly radioactive but that they have a long enough halflife to be ...

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Evaluation of Migration of Cesium-137 Adsorbed on Fine ...

KEYWORDS: radionuclide migration, cesium 137, aerated soil layer, fine soil particl(!B, size distribution, size dependency, filtration, evaluation I. INTRODUCTION The soil layer around a facility for radio­ active waste disposal is called a "natural barrier" and should be selected to prevent the

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