Transuranic elements determination in spanish NPP-wastes on the basis of gross alpha activity

2002 ◽  
Vol 90 (1) ◽  
Author(s):  
M. Rodríguez ◽  
J. L. Gascón
Keyword(s):  
Nuclear Power ◽  
Statistical Tests ◽  
Alpha Activity ◽  
Gross Alpha ◽  
Association Agreement ◽  
Gross Alpha Activity ◽  
Medium Level ◽  
Non Destructive ◽  
Destructive Methods

SummaryThe characterisation of alpha-emitting nuclides in low and medium level radioactive waste from Spanish nuclear power reactors leads to several difficulties because they cannot be assayed by non-destructive methods due to their low concentration. Thus, long and complex radiochemical procedures are required.In this paper an alternative method for establishing a sufficiently accurate and reliable inventory of long-lived alpha emitting nuclides, is described. The method is based on the application of the factors obtained by correlating the gross alpha activity and the concentration ofSeveral statistical tests are performed to evaluate the validity of the assumed relationship and the quality of the correlation. Also, uncertainties are calculated for the parameters of the linear equation relating the concentrations.This work has been performed in the framework of the CIEMAT-ENRESA Association Agreement.

scholarly journals Agricultural machine parts quality control by dynamic non-destructive methods

2018 ◽  
Vol 226 ◽  
pp. 04034 ◽  
Author(s):  
Alexey N. Beskopylny ◽  
Viktor B. Rykov ◽  
Elena M. Zubrilina ◽  
Andrey D. Chistyakov
Keyword(s):  
Quality Control ◽  
Wear Resistance ◽  
Manufacturing Process ◽  
Mechanical Characteristics ◽  
Point Of View ◽  
Agricultural Machinery ◽  
Machine Parts ◽  
Non Destructive ◽  
Destructive Methods

The problem of quality control of agricultural machinery parts by means of dynamic non-destructive methods of impact indentation of conical shape indenters is considered. Quality of the crucial parts is considered from the point of view of a set of mechanical characteristics that determine the strength, hardness, wear resistance and deformability. These characteristics must be known and be able to control on all the details promptly and accurately both in the manufacturing process and in operation. The mechanical characteristics of metals are stochastic in nature. For this purpose, an impact indentation device was developed, and the method based on probabilistic laws of dispersion of mechanical characteristics is obtained.

scholarly journals Study of Gross Alpha and Gross Beta Radioactivity in Environmental Samples

2015 ◽  
Vol 7 (1-2) ◽  
pp. 35-44 ◽  
Author(s):  
J. Ferdous ◽  
S. Biswas ◽  
A. Begum ◽  
N. Ferdous
Keyword(s):  
Water Sample ◽  
Soil Sample ◽  
Environmental Sample ◽  
Nuclear Power ◽  
Beta Activity ◽  
Gross Beta ◽  
Gross Alpha ◽  
Vegetable Sample ◽  
Gross Alpha Activity ◽  
Plant Area

The main objective of this study is to determine the Gross alpha and gross beta radioactivity in environmental sample. Thirty samples of soil, water and vegetable were randomly collected from the different locations of Bheramara and Ishwardi near the proposed Rooppur Nuclear Power Plant area, Kushtia and Pabna, Bangladesh. The Gross Alpha activity under investigation ranges from  1.13 to 5.66 Bq kg-1 with an average of 2.78±0.16 Bq kg-1 for soil sample, 0.45 to 1.36 mBq L-1 with an average of  0.91± 0.18 mBq L-1 for water sample, and 0.23 to 1.81 Bq kg-1 with an average of 1.0 ±0.11 Bq kg-1 for vegetable sample. The Gross Beta activity under investigation ranges from 30.74 to 132 Bq kg-1 with an average of 71.85±1.99 Bq kg-1 for soil sample, 61.49  to  279 mBq L-1 with an average of 175 ±4.02 mBq L-1 for water sample, and 305 to 1676 Bq kg-1 with an average of  930 ±3.27 Bq kg-1 for vegetable sample. This study will help to prepare baseline data for gross alpha and gross beta radioactivity in environmental sample which will be used as finger print for the comparison of radioactivity level.   

scholarly journals Gross Alpha and Gross Beta Activity Concentrations in the Dust Fractions of Urban Surface-Deposited Sediment in Russian Cities

Atmosphere ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 571
Author(s):  
Mohamed Y. Hanfi ◽  
Ilia Yarmoshenko ◽  
Andrian A. Seleznev
Keyword(s):  
Activity Concentration ◽  
Alpha Activity ◽  
Urban Surface ◽  
Beta Activity ◽  
Gross Beta ◽  
Gross Alpha ◽  
Gross Beta Activity ◽  
Gross Alpha Activity ◽  
Fraction Size ◽  
Radiation Measurements

Studies of gross alpha and gross beta activity in road- and surface-deposited sediments were conducted in three Russian cities in different geographical zones. To perform radiation measurements, new methods were applied which allow dealing with low mass and low volume dust-sized (2–100 μm) samples obtained after the size fractionation procedure. The 2–10 μm fraction size had the highest gross beta activity concentration (GB)—1.32 Bq/g in Nizhny Novgorod and Rostov-On-Don, while the 50–100 μm fraction size was most prominent in Ekaterinburg. This can be attributed to the presence of radionuclides that are transferred through natural and anthropogenic processes. The highest gross alpha activity concentration (GA) in fraction sizes was found in Rostov-on-Don city within the 50–100 μm range—0.22 Bq/g. The fraction sizes 50–100 μm have a higher gross alpha activity concentration than 2–10 μm and 10–50 μm fraction sizes due to natural partitioning of the main minerals constituting the urban surface-deposited sediment (USDS). Observed dependencies reflect the geochemical processes which take place during the formation and transport of urban surface sediments. Developed experimental methods of radiation measurements formed the methodological base of urban geochemical studies.

scholarly journals Study of gross alpha and gross beta activity concentration in sediment and soil samples of three southern districts of Tamil Nadu

2016 ◽  
Vol 4 (2) ◽  
pp. 319
Author(s):  
A. Priya Latha ◽  
G. Shanthi
Keyword(s):  
Urban Area ◽  
Tamil Nadu ◽  
Activity Concentration ◽  
Alpha Activity ◽  
Soil Samples ◽  
Beta Activity ◽  
Gross Beta ◽  
Gross Alpha ◽  
Gross Beta Activity ◽  
Gross Alpha Activity

<div><p><em>Human can be exposed to the radiation emitting from different radioactive sources depending upon their activities and surroundings. Human activities have contributed to the increased concentration of some radionuclides in the environment. A survey of the gross alpha and gross beta activity in soil samples collected along the three southern districts of TamilNadu has been carried out. Determination of the gross alpha and gross beta activity concentration are done by using ZnS (Ag) and low beta counter. The gross alpha activity varies from 162.3 Bq/kg to 3679.6 Bq/kg near the sea and ranges from 107.5 Bq/kg to 1774.1 Bq/kg 150 m away from the sea. The gross alpha activity in the sub-urban area varies from 53.67 Bq/kg to 644.12 Bq/kg. The gross beta activity concentration in the soil ranges from 388.8 Bq/kg to 40111.1 Bq/kg in the coastal region (near the sea) and ranges from 669.06 Bq/kg to13278.4 Bq/kg (150 m away from the sea). While the gross beta activity concentration in the sub-urban area varies from 1103.05 Bq/kg to 4202.12 Bq/kg. The obtained values shows soil from the sampled locations may pose some long time health hazards to the public. Statistical analysis are also performed between the soil samples. <strong></strong></em></p></div>

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