Profiles of doses to the population living in the high background radiation areas in Kerala, India

Chougaonkar, M.P.; Eappen, K.P.; Ramachandran, T.V.; Shetty, Priyalata; Mayya, Y. S.; Sadasivan, S.; Raj, V. Venkat

doi:10.1016/s0265-931x(03)00174-7

Cited by 74 publications

(33 citation statements)

References 10 publications

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“…In the HBRA, indoor ambient gamma dose rate is higher than the outdoor dose rate, and it distributes widely between 260 and 600 nGy h -1 [2]. Different from the HBRAs such as Kerala, India, where external exposure is dominant [3], Yangjiang is characterized by dominant internal exposure. It was reported that average annual effective dose to residents in HBRAs of Yangjiang was estimated to be 6.4 mSv with doses of 2.1 and 4.3 mSv for the external and internal exposure, respectively [4].…”

Section: Introductionmentioning

confidence: 99%

A pilot study for dose evaluation in high-level natural radiation areas of Yangjiang, China

Omori

Tokonami

Ishikawa

et al. 2015

J Radioanal Nucl Chem

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A pilot study to measure ambient gamma dose rate and radon and thoron progeny concentrations was made for eight dwellings selected in Yangjiang, China. Indoor and outdoor ambient gamma dose rates were 110-370 and 100-220 nGy h -1 , respectively. Doses received from indoor terrestrial radiation were estimated to be 0.6-1.8 mSv year -1 . Radon, thoron and thoron progeny concentrations were 19-98, 18-1120 and 0.4-10.3 Bq m -3 , respectively. This pilot study showed that the position of passive-type monitors to be placed and the deployment period should be carefully determined for estimating reliable annual average concentrations.

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Section: Introductionmentioning

confidence: 99%

A pilot study for dose evaluation in high-level natural radiation areas of Yangjiang, China

Omori

Tokonami

Ishikawa

et al. 2015

J Radioanal Nucl Chem

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“…Estimates of the total radiation dose to the world population have shown that a fraction of about 96 % is from natural sources, while 4 % is from artificial ones (Chougaonkar et al 2003). External gamma dose contributions are predominantly from the presence of 40 K and of 232 Th and 238 U and their progeny in various rocks and soils.…”

Section: Introductionmentioning

confidence: 99%

Distribution of natural radionuclides in surface soils in the vicinity of abandoned uranium mines in Serbia

Momčilović

Kovačević²,

Tanic³

et al. 2012

Environ Monit Assess

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The activity concentrations of natural radionuclides in soils from the area affected by uranium mining at Stara Planina Mountain in Serbia were studied and compared with the results obtained from an area with no mining activities (background area). In the affected area, the activity concentrations ranged from 1.75 to 19.2 mg kg(-1) for uranium and from 1.57 to 26.9 mg kg(-1) for thorium which is several-fold higher than those in the background area. The Th/U, K/U, and K/Th activity ratios were also determined and compared with data from similar studies worldwide. External gamma dose rate in the air due to uranium, thorium, and potassium at 1 m above ground level in the area affected by uranium mining was found to be 91.3 nGy h(-1), i.e., about two-fold higher than that in background area. The results of this preliminary study indicate the importance of radiological evaluation of the area and implementation of remedial measures in order to prevent further dispersion of radionuclides in the environment.

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“…Estimation of total radiation dose to the world population has shown that about 96% is from natural sources while 4% is from artificial sources [1]. Globally, not much attention was given to public exposure to radon gas ( 222 Rn) until the 1980s when dangerous radon ( 222 Rn) levels were reported inside homes and schools in the United States of America [2].…”

Section: Radon (mentioning

confidence: 99%

Radon Concentration Levels Estimation in Some Drinking Water Samples from Communities around Lumwana Mine in North Western Province of Zambia

Katebe¹,

Phiri²,

Nyirenda³

2017

JMSE-A

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Abstract:The difference in the concentration of dissolved radon ( 222 Rn) in drinking water from wells and streams around Lumwana area in Zambia remains of interest because of the radiation-induced public health hazards. A total of nine (09) communities around Lumwana mine were selected for this study because their sources of drinking water are wells and streams. The underlying geology of this area is predominantly high grade, metamorphosed, intensely mylonitised, recrystallised muscovite-phlogopite-quartz-kyanite schists with disseminated sulphides (typically < 5%), dominated by chalcopyrite and bornite with known elevated concentrations of uranium, which ultimately decays to radon gas. The main aim of this paper is to estimate the contribution of ( 222 Rn) to public exposure due to natural radioactivity in drinking water. The concentration of radon levels in the collected water samples was analyzed using an Alpha Spectrometer called RTM (radon thoron monitor 2200) and the average results were found to vary from 4.44 Bq/L to 32.13 Bq/L. The obtained values are lower than the WHO (world health organization) recommended guidelines for drinking-water quality value of 100 Bq/L. The annual effective dose for the adults in these communities were in the range of 16.21 to 117.28 µSv/a slightly above the WHO recommended guideline reference dose level of 100 µSv/a.

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Profiles of doses to the population living in the high background radiation areas in Kerala, India

Cited by 74 publications

References 10 publications

A pilot study for dose evaluation in high-level natural radiation areas of Yangjiang, China

A pilot study for dose evaluation in high-level natural radiation areas of Yangjiang, China

Distribution of natural radionuclides in surface soils in the vicinity of abandoned uranium mines in Serbia

Radon Concentration Levels Estimation in Some Drinking Water Samples from Communities around Lumwana Mine in North Western Province of Zambia

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