Calibration and testing of a portable NaI(Tl) gamma-ray spectrometer-dosimeter for evaluation of terrestrial radionuclides and 137Cs contributions to ambient dose equivalent rate outdoors

Рамзаев, В. П.; Barkovsky, A. N.; Bernhardsson, Christian; Mattsson, Sören

doi:10.21514/1998-426x-2017-10-1-18-29

Cited by 13 publications

(4 citation statements)

References 9 publications

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“…With the energy resolution of our NaI(Tl) detector of 8% (662 keV), the 662 keV peak itself, due to its very small area, can hardly be distinguished against the background contribution of radiation from natural radionuclides (see also Figure 2 in Ramzaev et al . ( 14 ) ). It will be possible to confirm or reject the presence of 137 Cs in soil of the grassland areas based on results of laboratory analysis of samples taken near the BelNPP ( 10 ) .…”

Section: Resultsmentioning

confidence: 99%

“…The calculated values of ADER Cs at the 45 grassland plots ranged from −2.1 to 4.0 nSv/h (mean = 1.5 nSv/h; median = 1.7 nSv/h). The presence of values with a negative sign is explained by the influence of the uncertainty in calculating ADER Cs as the difference between ADER tot and ADER NRN ( 14 , 21 ) . The average statistical uncertainty for calculating ADER NRN was 9% or 4 nSv/h (95% probability).…”

Section: Resultsmentioning

confidence: 99%

“…In addition to the options provided by the manufacturer, Ramzaev et al . ( 14 , 15 ) calibrated the AT6101D device to separately determine values of the ambient dose equivalent rate from natural radionuclides (ADER NRN , nSv/h) and 137 Cs (ADER Cs , nSv/h). We used both the options offered by the manufacturer of AT6101D and the methods described in the study of Ramzaev et al .…”

Section: Methodsmentioning

confidence: 99%

“…We used both the options offered by the manufacturer of AT6101D and the methods described in the study of Ramzaev et al . ( 14 ) The discriminative determination of the natural and technogenic components of the gamma radiation dose rate is necessary for further monitoring studies in this region using gamma spectrometers. In addition, the availability of regional data on the natural component makes it possible to correctly estimate its contribution to the total dose rate of gamma radiation in the air, if measurements are performed using routine dosemeters in the event of a radiation accident.…”

Section: Methodsmentioning

confidence: 99%

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Ambient dose equivalent rates of gamma radiation from natural radionuclides and 137Cs at grasslands and forests in the area of the Belarusian NPP in the pre-commissioning period (2019)

Ramzaev,

Bernhardsson,

Vodovatov

et al. 2024

Radiation Protection Dosimetry

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In situ gamma-spectrometric measurements were performed at grasslands (45 plots) and forests (6 plots) in the vicinity of the Belarusian nuclear power plant in September–October 2019. The aim of the study was to evaluate the baseline level of ambient dose equivalent rates of gamma radiation from natural radionuclides and 137Cs in the period preceding the commissioning of the NPP. The study revealed more than a 2-fold variability in values of the total ambient dose equivalent rate: from 29 to 72 nSv/h. This spread can be explained by variability in the content of natural radionuclides in the environment and, accordingly, ambient dose equivalent rate. At forest sites, compared to grassland sites, the values of ambient dose equivalent rates of gamma radiation from natural radionuclides were statistically significantly lower. The contribution of gamma radiation from 137Cs to the total ambient dose equivalent rate was insignificant and averaged 3% for grasslands and 6% for forests.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%