Radiometric investigations of technogenic objects

Factors increase in background radiation at uranium production facilities

“…From the Table 2. it can be seen that in columns 1-2, 3 and 4 of the Table the nuclearphysical constants of radionuclides are given, and columns 5, 6 and 7 show the number of particles emitted in 1 s ( 5), the distance of their displacement in one act of decay ( 6) and the distance of displacement in 1 sec (7). As can be seen from the results given in column ( 5) tab.…”

“…It is known from the literature data [1][2] that natural uranium consists of three natural radionuclides -238 U, 235 U and 234 U. Their quantitative ratio is 238 U-99.27%, 235 U-0.72%, 234 U-0.0053%, and the specific activity of these radionuclides in mutual radioactive equilibrium is -1.23•10 4 Bq/g, 4.9•10 4 Bq/g and 2.3•10 8 Bq/g accordingly [3][4][5][6]. And research conducted in recent years shows [7][8][9] that there are violations of the radioactive equilibrium between these radionuclides in the uranium decay chain, negatively affecting the quality of finished uranium products and creating an additional gamma background of ionizing radiation.…”

“…Their quantitative ratio is 238 U-99.27%, 235 U-0.72%, 234 U-0.0053%, and the specific activity of these radionuclides in mutual radioactive equilibrium is -1.23•10 4 Bq/g, 4.9•10 4 Bq/g and 2.3•10 8 Bq/g accordingly [3][4][5][6]. And research conducted in recent years shows [7][8][9] that there are violations of the radioactive equilibrium between these radionuclides in the uranium decay chain, negatively affecting the quality of finished uranium products and creating an additional gamma background of ionizing radiation. There are many nuclear-physical factors that are the causes of violations of the radioactive equilibrium between these radionuclides, such as the age of minerals, migration coefficients of radionuclides, geochemical factors, recoil energies, geotechnology conditions of leaching, etc.…”