Estimating the terrestrial gamma dose rate by decomposition of the ambient dose equivalent rate

Bossew, Peter; Cinelli, Giorgia; Hernández-Ceballos, M.A.; Cernohlawek, N.; Gruber, Valeria; Dehandschutter, Boris; Menneson, François; Bleher, M.; Stöhlker, U.; Hellmann, I.; Weiler, Florian; Tollefsen, Tore; Tognoli, P.V.; Cort, Marc De

doi:10.1016/j.jenvrad.2016.02.013

Cited by 58 publications

(34 citation statements)

References 28 publications

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“…Since, the use of Radex monitor is limited for high cosmic ray measurement, the dose rate of natural radiation known as a terrestrial type of radiation, as well as radionuclides in the air (radon progenies, 7 Be and 22 Na in the atmosphere) were measured." Assuming that average outdoor radon concentration of 10 Bq/m 3 would contribute about 2.5 nSv/h, and contributions from gamma radiating 7 Be and 22 Na are far below 1 nSv/h [9], the total contribution of this component to the dose rate is very small.…”

Section: Methods Of Measurementsmentioning

confidence: 99%

Outdoor and Indoor Ambient Dose Equivalent Rates in Berane Town, Montenegro

Gulan¹,

Spasović²

2017

RAD Conference Proceedings

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Abstract. This paper presents the results of ambient dose rate measurements conducted in the air of Berane town, Republic of Montenegro. Measurements were performed by Geiger-Müller counter -Radex RD1503 + , in the middle of October 2015. An average daily value of 114.8 nSv/h of ambient dose equivalent rate was obtained, spanning from 50-160 nSv/h in the morning and 70-177 nSv/h in the evening. Analysis of the impact of spatial variations on gamma radiation levels shows a very weak correlation between indoor ambient dose rate and outdoor ambient dose rate measured either in the morning (r = 0.09) or in the evening (r = 0.19). Building materials or stuff in buildings do not contribute additionally to ambient dose rates. Due to the lack of published data of dose rates, these results are the first measurements of radiation levels in Berane town.

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Section: Methods Of Measurementsmentioning

confidence: 99%

Outdoor and Indoor Ambient Dose Equivalent Rates in Berane Town, Montenegro

Gulan¹,

Spasović²

2017

RAD Conference Proceedings

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“…The Sv/Gy conversion coefficient for U series is estimated to be 1.253 (see [3] and references therein). Therefore, the theoretically expected conversion coefficient from AC eff to ADER TRN may range from 0.45 (nSv h ) lies within the range and deviates less than 10% from the theoretical mean and median values.…”

Section: Validation Of the Additional Calibrationmentioning

confidence: 99%

“…Federal Center of Hygiene and Epidemiology of Federal Service for Surveillance on Consumer Rights Protection and Human Well-Being, Moscow, 2007)]. The dosimeter reading in terms of ambient dose equivalent rate, Ḣ*(10), (ADER reading ) is the sum of the following major components: 1) dose rate due to the terrestrial radionuclides of 238 U series, 232 Th series and 40 K (ADER TRN ); 2) dose rate due to the directly ionizing and photon component of cosmic radiation; 3) intrinsic noise of the dosimeter; 4) dose rate due to technogenic radionuclides [1,2,3]. Additional small contribution to ADER reading can be associated with some other terrestrial radionuclides, including those of the 235 U series and 138 La, the so called "cosmogenic" natural gamma-emitting radionuclides ( 7 Be and 22 Na) and Rn progenies in the atmosphere [3,4,5,6].…”

Section: Introductionmentioning

confidence: 99%

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

Рамзаев¹,

Barkovsky²,

Bernhardsson³

et al. 2017

Radiac. gig. (2008)

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“…Ambient dose rates of natural radiation could be influenced by soil composition, atmospheric conditions, topography and vegetation (Bossew et al 2017;Ljiljana and Lidija 2017). Natural radionuclides in building materials may cause both external exposure caused by their direct gamma radiation and also internal exposure from radon gas.…”

Section: Introductionmentioning

confidence: 99%

Indoor External Radiation Risk in Densely Populated Regions of Southern Nigeria

Ife-Adediran

Uwadiae

2018

Earth Syst Environ

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It is known that certain types of building materials contain significant concentrations of natural radionuclides; consequently, exposure to indoor background radiation is from the combined radioactivity from the soil as well as building materials; indoor exposures therefore have higher radiation hazard potentials than outdoor exposures in this regard and hence, need to be monitored. In this paper, an evaluation of background ionizing radiation from different buildings in Lagos and Ibadan, Southwestern Nigeria was carried out to determine the exposure rate of the general public to indoor ionizing radiation. 630 in situ measurements from the different buildings were taken using a Geiger Muller counter (model GQ-320 Plus). The indoor dose rates (i.e., 50-120 nGy/h) were within the world average values while the Annual Effective Dose for most of the buildings were above the world average AED for indoor gamma exposure from building materials. The mean AED for Lagos and Ibadan due to indoor exposures were 0.37 and 0.39 mSv/y with Excess Lifetime Cancer Risk of 0.99E−3 and 1.05E−3, respectively.

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Estimating the terrestrial gamma dose rate by decomposition of the ambient dose equivalent rate

Cited by 58 publications

References 28 publications

Outdoor and Indoor Ambient Dose Equivalent Rates in Berane Town, Montenegro

Outdoor and Indoor Ambient Dose Equivalent Rates in Berane Town, Montenegro

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

Indoor External Radiation Risk in Densely Populated Regions of Southern Nigeria

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