Distribution of gamma radiation dose rate related with natural radionuclides in all of Vietnam and radiological risk assessment of the built-up environment

Inoue, Kazuaki; Fukushi, Masahiro; Le, Tan; Tsuruoka, Hiroshi; Kasahara, Shogo; Veerasamy, Nimelan

doi:10.1038/s41598-020-69003-0

Cited by 37 publications

(18 citation statements)

References 27 publications

(37 reference statements)

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“…This result is approximately 46% higher than the experimental analysis made by El-Taher (2012), which found a value of 25.08 nGy h −1 for the granite used as building materials in Qassim area of Saudi Arabia. Inoue et al (2020) found that the average absorbed dose rate in air for all Vietnam, due to natural radionuclides such those considered in the present work, was 75 ± 32 nGy h −1 , with values varying from 8 -463 nGy h −1 . Table 5 presents the annual effective dose rate contribution for different radionuclides and for different virtual phantoms, which were obtained based on the dose rate in air and the CC [E] values.…”

Section: Table 4 CC [Hsupporting

confidence: 45%

Computational dose evaluation on children exposed to natural radioactivity from granitic rocks used as architectural materials

Santos¹,

Neves²,

Belinato³

et al. 2022

J. Radiol. Prot.

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Considering the higher radiosensitivity of children in comparison to adults, studies related to children’s exposure to ionising radiation have been long considered of relevance. For this study, the MCNPX2.7.0 Monte Carlo code and four paediatric voxel computational anthropomorphic phantoms, of both genders and aged 5 and 10 years, were used to simulate scenarios, where children are exposed to natural radiation emitted by sources in the ground by radionuclides of 40K and of 232Th and 238U radioactive series. These elements are part of the composition of ten different types of ornamental rocks obtained from three regions of Brazil, and used as architectural material for flooring of houses. The virtual paediatric anthropomorphic phantoms were positioned in a room with dimensions of (4.0 × 5.0 × 2.8) m3 filled with atmospheric air and a 3 cm thick granitic floor acting as a uniformly distributed planar gamma radiation source. The walls of the room were composed of 20 cm thick concrete. Gonads, bone marrow, bladder, colon, and skin were found to be the organs which receive the highest doses. The mean values of effective dose per air kerma at 1 m above the ground summed for all three radionuclides, were 0.96 and 0.68 Sv Gy−1 for the 5 and 10 year old phantoms, respectively. The obtained results showed that the granitic rocks considered implicate annual effective doses which are 69%–78% lower than the annual limits, recommended by ICRP Publication 103.

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Section: Table 4 CC [Hsupporting

confidence: 45%

Computational dose evaluation on children exposed to natural radioactivity from granitic rocks used as architectural materials

Santos¹,

Neves²,

Belinato³

et al. 2022

J. Radiol. Prot.

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“…Therefore, the coal demand and consequently, the amount of fly ash and slag discharged into the environment from Vinh Tan CFPPs might be higher than those from Duyen Hai CFPPs. The previous study of Inoue et al (2020) 26 also showed that the absorbed dose rate (65 nGy h −1 ) in Binh Thuan province was higher than the corresponding value (54 nGy h −1 ) in Tra Vinh province.…”

Section: Discussionmentioning

confidence: 74%

A preliminary study of geological variation of in-situ gamma dose rate in the vicinity of coal-fired power plants

Thien

Truong

et al. 2021

Sci. Tech. Dev. J.

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Introduction: The utilization of fossil fuels in coal-fired power plants (CFPPs) for electricity generation could lead to the release of additional natural and artificial radioisotopes into the surrounding environment and consequently, increase the gamma dose rate at these areas. Methods: In this study, the geological variation of gamma dose rate in the vicinity of Duyen Hai CFPP complex and Vinh tan CFPP complex were evaluated. Results: The obtained gamma dose rates were in the range from 0.07 to 0.22 μSv h-1 with the average value of 0.13 μSv h-1 for Duyen Hai area and in the range from 0.14 to 0.34 μSv h-1 with the average value of 0.21 μSv h-1. The results indicated that the gamma dose rate in Vinh tan area is higher than the corresponding value of Duyen Hai area. Both natural aspects, such as the geological differences as well as geomorphology and weathering process, and anthropogenic aspects, such as the difference in operational scale, coal consumption and ash discharge between Duyen Hai and Vinh Tan CFPP complex, might significantly contribute to the variation of gamma dose rate in the investigated locations. Conclusion: Overall, the calculated outdoor annual effective doses of two studied areas showed that the radiological impacts of both Duyen Hai and Vinh Tan CFPP complex to the environment and public health are negligible.

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“…The dose rate refers to the intensity of the radionuclides stored in every part of the tissue situated at every location of the body (Inoue et al, 2020). Inoue at al.…”

Section: Absorbed Dose Rate (Adr)mentioning

confidence: 99%

“…The dose rate refers to the intensity of the radionuclides stored in every part of the tissue situated at every location of the body (Inoue et al, 2020). Inoue at al. (2020) emphasized that the ADR is the basis upon which damages done to the tissues or organs of humans can be estimated.…”

Section: Absorbed Dose Rate (Adr)mentioning

confidence: 99%

Study of Natural Radionuclides in Frequently Consumed Foodstuffs in Ode-Irele, Ondo State, Nigeria

Odudu¹,

Adepehin

Onoja

et al. 2022

USci

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Identifying the natural radionuclides in frequently consumed foodstuffs has attracted research interests from many researchers. In this study, we reported the quantities of natural radionuclides in frequently consumed foods in the community of Ode-Irele in Ondo State, Nigeria. Data obtained for this study were analysed using the gamma-ray spectrometer. Careful examination of six (6) different foodstuffs obtained at random for four (4) different times from the community’s local market was done: all of them were discovered to be rich in Th-232, U-238 and K-40. The activity concentrations of the foodstuffs ranged from 58.21±5.93 Bqkg-1 to 1.91±0.41 Bqkg-1 with a mean value of 11.74±1.22 Bqkg-1 for Th-232, 41.82±9.48 Bqkg-1 to 3.12±0.39 Bqkg-1 with a mean value of 12.38±2.27 Bqkg-1 for U-238 and 1854.12±126.83 Bqkg-1 to 134.72±12.62 Bqkg-1 with mean value of 280.22±30.08 Bqkg-1 for K-40. The minimum and maximum dose rates discovered from the foodstuffs are respectively 8.03nGyh-1 and 132.35nGyh-1. The mean value of all absorbed dose rates (28.99nGyh-1) was found to be less than the world average limit of 55.0nGyh-1. Comparison of the annual committed effective doses determined from the mean of the natural radionuclides (0.155mSvy-1) in the foodstuffs to the global recommended limit (1mSvy-1), showed that the frequently consumed foods by the people in the community posed no important radiation-related risk to them.

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Distribution of gamma radiation dose rate related with natural radionuclides in all of Vietnam and radiological risk assessment of the built-up environment

Cited by 37 publications

References 27 publications

Computational dose evaluation on children exposed to natural radioactivity from granitic rocks used as architectural materials

Computational dose evaluation on children exposed to natural radioactivity from granitic rocks used as architectural materials

A preliminary study of geological variation of in-situ gamma dose rate in the vicinity of coal-fired power plants

Study of Natural Radionuclides in Frequently Consumed Foodstuffs in Ode-Irele, Ondo State, Nigeria

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