Radiation exposure at the high background area at Manavalakurichi — The changing trends

Radiation exposure and effective dose received through two routes of exposure, viz. external and internal, via inhalation, by residents of coastal villages belonging to Natural High Background Radiation Areas (NHBRA) of Kanyakumari District and Tamil Nadu inIndiawere studied. While the indoor gamma radiation levels were monitored using Thermo Luminescent Dosimeters (TLDs), the indoor radon and thoron gas concentrations were measured using twin chamber dosimeters employing Solid State Nuclear Track Detectors (SSNTDs, LR-115-II). The average total annual effective dose was estimated and found to be varied from 2.37 to8.64 mSv.

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HIGH BACKGROUND AREA FOR RADIATION EDUCATION

Radiation Protection Dosimetry ◽

10.1093/rpd/ncz084 ◽

2019 ◽

Vol 184 (3-4) ◽

pp. 294-297 ◽

Cited By ~ 1

Author(s):

N Matsuda ◽

N Fukuda ◽

M Yamauchi ◽

Y Tsunoyama ◽

S Tomita ◽

...

Keyword(s):

Environmental Samples ◽

Real Life ◽

Educational Effectiveness ◽

High Radiation ◽

High Background ◽

Trial Experience ◽

Tottori Prefecture ◽

Radiation Area ◽

Radiation Education ◽

Background Area

Abstract This paper describes our trial experience of the use of high radiation area for radiation education. We used environmental samples collected from the high radiation area in Fukushima prefecture and India, for the practice of radiation measurement and health risk assessment in Nagasaki University Medical School. We also carried out the field monitoring seminar for students in the existing exposure areas in Tottori prefecture and the Yamakiya observatory in Fukushima. Although the evaluation of educational effectiveness is still underway, both types of education appeared attractive for the students mostly due to the exposure from natural environment in our real life which was not achieved by using an artificial radiation source in a classroom.

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Distribution and Enrichment of Radionuclides in the Newly Discovered High Background Area in Ullal on the Southwest Coast of India

Health Physics ◽

10.1097/00004032-199508000-00002 ◽

1995 ◽

Vol 69 (2) ◽

pp. 178-186 ◽

Cited By ~ 12

Author(s):

Y. Narayana ◽

A. P. Radhakrishna ◽

H. A. Somashekarappa ◽

N. Karunakara ◽

K. M. Balak ◽

...

Keyword(s):

High Background ◽

Southwest Coast Of India ◽

Southwest Coast ◽

Background Area

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World high background natural radiation areas: Need to protect public from radiation exposure

Radiation Measurements ◽

10.1016/j.radmeas.2012.03.011 ◽

2013 ◽

Vol 50 ◽

pp. 166-171 ◽

Cited By ~ 33

Author(s):

Mehdi Sohrabi

Keyword(s):

Radiation Exposure ◽

Natural Radiation ◽

High Background

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Assessment of radiation exposure in the settlements located in Stepnogorsk area

Eurasian journal of physics and functional materials ◽

10.32523/ejpfm.2021050107 ◽

2021 ◽

Vol 5 (1) ◽

pp. 52-63

Author(s):

D.S. Ibrayeva ◽

M.N. Aumalikova ◽

K.B. Ilbekova ◽

M.M. Bakhtin ◽

P.K. Kazymbet ◽

...

Keyword(s):

Radiation Exposure ◽

Group Living ◽

Background Level ◽

Health Impacts ◽

Mining Activities ◽

Combined Effects ◽

Radiological Assessment ◽

Annual Dose ◽

High Background ◽

Mining Site

The Stepnogorsk area Northern Kazakhstan has a long history mining activities. Mining activities have lots of environmental and health impacts. The aims of this study were to characterizing the general radiological situation of the area and evaluate radiation exposure by scenarios in settlements. In this study radiological assessment was performed for critical group living in the territory contaminated with radionuclides; working and studying at school located on territory former mining site. The annual dose burden is 2.5 mSv y−1 in Zavodskoy, 1.9 mSv y−1 in Kvartsitka and 3.6 mSv y−1 in Aqsu; and exposure from radon is around 11 mSv y−1 at the ground floor, and for teachers - up to 12 mSv*y−1. At settlements, however, under the hypothesis that all food contaminated with radionuclides and vegetables is cultivated locally in the territories with high background level, exposure from ingestion is 9.1 mSv y−1 in Zavodskoy, 8.3 mSv y−1 in Kvartsitka and 11.5 mSv y−1 in Aqsu. The combined effects of environmental problems have culminated into health problems. There are such possibility of the higher prevalence of cardiovascular, digestive and respiratory systems so it is necessary to evaluate or protect people living in Stepnogorsk area.

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A Revised Method of Surface Water Quality Evaluation Based on Background Values and Its Application to Samples Collected in Heilongjiang Province, China

Water ◽

10.3390/w11051057 ◽

2019 ◽

Vol 11 (5) ◽

pp. 1057 ◽

Cited By ~ 4

Author(s):

Maoqing Duan ◽

Xia Du ◽

Wenqi Peng ◽

Shijie Zhang ◽

Linqing Yan

Keyword(s):

Water Quality ◽

Surface Water ◽

Quality Evaluation ◽

Surface Water Quality ◽

Quality Data ◽

Water Quality Evaluation ◽

High Background ◽

Background Values ◽

Regional Water ◽

Background Area

In China, the use of certain standards to evaluate surface water quality in areas with high background values due to natural factors rather than to human activities results in water quality underestimation and thus affects regional water quality management and decision-making. Herein, we examined river source water function zones of the Heilongjang province characterised by high background values and analysed the corresponding water quality data acquired in 2011–2016. The examined samples featured elevated chemical oxygen demand (COD), permanganate index (CODMn), and ammonia nitrogen (NH3-N) levels, which indicated that water quality was affected by the natural environment. The concentrations of background pollutants almost exceeded the limits stipulated by regional surface water quality standards and exhibited strong spatiotemporal variability. A three-step discrimination method including single index recognition, limiting factors, and a synthetic index was proposed to distinguish the background area among these zones for determining background values, and 10 complete background areas were identified. The background values of COD, CODMn, and NH3-N for the entire area were determined based on the data acquired during background area monitoring. Finally, considering the present procedure of water quality evaluation in China (single factor exponential method), a revised method based on background values was suggested. Thus, the evaluation results objectively and accurately reflect the regional water quality situation and therefore provide a scientific basis for the development of a better water quality assessment and management system in China.

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