Wind uplift of radioactive dust from the ground

Makhon'ko, K.P.

doi:10.1007/bf00761237

Cited by 12 publications

(3 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…До аварии объемная активность этих изотопов здесь была меньше 10 -9 Бк/м 3 . Загряз ненные территории до настоящего времени служат источником вторичного загряз нения приземного слоя атмосферы плутонием за счет ветрового подъема [19].…”

Section: загрязненные после чернобыльской аварии территорииunclassified

Plutonium in the locations of local sources and it’s involvement into global circulation

Bulgakov

Gnilomedov

Katkova

et al. 2017

YadEn

View full text Add to dashboard Cite

show abstract

Section: загрязненные после чернобыльской аварии территорииunclassified

Plutonium in the locations of local sources and it’s involvement into global circulation

Bulgakov

Gnilomedov

Katkova

et al. 2017

YadEn

View full text Add to dashboard Cite

show abstract

“…This large differenee is attributed to the predominant state of the underlying surface at that time. The precipitation was 154 nun from June to September in 1992 and 411 mm in the same period in 1993 [6]. More precipitation means that the soil is moister and less dust is formed in the district and hence the coefficient of wind raising is higher.…”

mentioning

confidence: 97%

“…In [6] we reported the results of daily measurements of the meteorological parameters and the 137Cs concentration q in the air in 1992-1993 on the outskirts of Novozybkov, in the western part of Bryansk province. The average value of q was 36.8"10 -5 Bq/m 3 for July-September in 1992 and 11.7"10 -5 Bq/m 3 for the same period in 1993.…”

mentioning

confidence: 99%

Distribution of the atmospheric concentration of137Cs raised by the wind from the surface of the soil on the territory of bryansk province

Makhon'ko¹,

Beschastnov²,

Korsakov³

et al. 1996

At Energy

Self Cite

View full text Add to dashboard Cite

551.510.72+551.515.3 In recent years, radioactive dust raised from the surface of the soil by the wind has increased the t37Cs concentration in the air of regions that have been contaminated as a result of the Chernobyl disaster [1]. The distribution of that concentration in the atmosphere at the ground in Bryansk Oblast (Province) was calculated by using a digital electronic map of the contamination density with an interval of 0.5 x 0.5 km and a landscape map with the same resolution. The maps were drawn by the method of [2] from the results of a helicopter 7 -spectrometric survey by "Taifun" in 1992.A digital map of the 137Cs contamination of the territory of Bryansk Province has been obtained with such high resolution for the f'trst time. An idea of the possibilities of using the data as a starting point in various calculations is given by the map with a resolution of 0.5 x 0.5 km that shows the cumulative external 131I radiation dose received by the population in that region [3]. The high degree of spatial detailing made it possible to detect large fluctuations of the t3tI radiation dose, amounting to 2 sSv (rem).A digital landscape map of the district made it possible to take new approaches when calculating the 137Cs contamination of the air by secondary migration when 137Cs is raised from the surface of the soil. The rate at which dust is formed obviously depends on the type of underlying surface: field, grassland, forest, swamp, water surface, or village. During the helicopter -/-ray survey the operator pressed one of six buttons on the control panel to choose the type of underlying surface, which was determined visually inside the collimation detector scanning range with a radius of 100-150 m. The type of underlying surface was recorded to decrease the spread of data from one measurement to another because of the difference in the -/-ray attenuation factors. Possible errors were due to, e.g., the poor visual differences of the old and fresh deposits and the fact that the survey area could be classified as simultaneously having several types of underlying surface.The problem of constructing a field with the general characteristics of the underlying surface (degree of tillage, deforestation, watering, etc.) from the data obtained along the parallel paths flown by the helicopter was solved on the assumption that those landscape characteristics were isotropic and inhomogeneons over a distance smaller than the survey scale (i.e., up to 1 km). For points at the corners of a square grid with a cell size of 0.5 km, we calculated the relative frequency with which each type of underlying surface occurred during a flight and equated it to the probability of detection of a given type inside the cell. For a helicopter speed of about 150 km/h (about 40 km/sec), depending on the position of the grid node relative to the flight path we determined the type of underlying surface on the basis of roughly 30-40 observations at 1-sec intervals for every 40 m. For a strip about 200-300 m wide the observed sample at each gri...

show abstract

Re-entrainment of the Chernobyl-Derived Radionuclides in Air: Experimental Data and Modeling

Garger

Таlerko

2020

Behavior of Radionuclides in the Environment II

View full text Add to dashboard Cite

Wind uplift of radioactive dust from the ground

Cited by 12 publications

References 2 publications

Plutonium in the locations of local sources and it’s involvement into global circulation

Plutonium in the locations of local sources and it’s involvement into global circulation

Distribution of the atmospheric concentration of137Cs raised by the wind from the surface of the soil on the territory of bryansk province

Re-entrainment of the Chernobyl-Derived Radionuclides in Air: Experimental Data and Modeling

Contact Info

Product

Resources

About