Assessment of the average effective dose from the analysis of 226Ra, 232Th and 40K in soil samples from Punjab, India

Abstract: The aim of the current study was to measure indoor radon concentration levels and its resulting doses received by the students and staff in schools of the directorate of education in the north of Hebron region- Palestine, during the summer months from June to September (2018), using CR-39 detectors. In this study, a total of 567 CR-39-based radon detectors were installed in the selected schools. The average radon concentrations were found to be 90.0, 66.5 and 58.0 Bqm-3 in Halhul, Beit Umar and Alarrub camp schools, respectively. Based on the measured indoor radon data, the overall average effective dose for the studied area was found to be 0.31 mSvy-1. Reported values for radon concentrations and corresponding doses are lower than ICRP recommended limits for workplaces. The results show no significant radiological risk for the pupils and staff in the schools under investigation. Consequently, the health hazards related to radiation are expected to be negligible. Keywords: Radon concentration, Alpha particles, Annual effective dose, Schools. PACs: 29.40.−n.

Download Full-text

Assessment of radioactivity from selected soil samples from Halfa Aljadida area, Sudan

Radiochimica Acta ◽

10.1515/ract-2018-3067 ◽

2019 ◽

Vol 107 (6) ◽

pp. 489-502

Author(s):

Abd-Elmoniem A. Elzain ◽

Hajo Idriss ◽

Yousif Sh. Mohammed ◽

Khidir Shaib Mohamed ◽

Mohamed Abd Elwahab Mohamed Ali ◽

...

Keyword(s):

Effective Dose ◽

Dose Rate ◽

Linear Correlation ◽

Radon Concentration ◽

Soil Samples ◽

Average Value ◽

Soil Gas Radon ◽

Effective Dose Rate ◽

Alpha Index ◽

Concentration Surface

Abstract In this research, the results of radon concentration, surface and mass exhalation rates, radium concentration, effective dose rate and the alpha index have been investigated in a number of 198 soil samples that have been collected from various residential locations of Halfa Aljadida area, Sudan. The can technique, containing CR-39 have been used. From our results, the average value of soil gas radon concentration was found to be 1.96±0.22 kBq·m−3. The average values of surface and mass exhalation rates were 1.73±0.19 Bq·m−2·h−1 and 34.79±3.87 mBq·kg−1·h−1, respectively. The radium concentration average value was 8.06±0.90 Bq·kg−1. While the average value of the effective dose rate was recorded to be 54.69±6.11 mSv·y−1. The average value of alpha index of studied samples was (4.03±0.45)×10−2. From the study, a good positive and linear correlation between radium concentration, surface and mass exhalation rates of soil samples were present. In addition to that, a positive and linear correlation between radium and radon concentrations was found. Finally, a comparison between the results and other findings was conducted and the results imply the fact that the area under consideration is safe as if the health hazard are mentioned.

Download Full-text

A comparison of the dose from natural radionuclides and artificial radionuclides after the Fukushima nuclear accident

Journal of Radiation Research ◽

10.1093/jrr/rrv102 ◽

2016 ◽

Vol 57 (4) ◽

pp. 422-430 ◽

Cited By ~ 4

Author(s):

Masahiro Hosoda ◽

Shinji Tokonami ◽

Yasutaka Omori ◽

Tetsuo Ishikawa ◽

Kazuki Iwaoka

Keyword(s):

Effective Dose ◽

Indoor Radon ◽

Natural Radionuclides ◽

Temporary Housing ◽

Radon Activity ◽

Artificial Radionuclides ◽

Activity Concentrations ◽

Fdnpp Accident ◽

Effective Doses ◽

Average Effective Dose

Abstract Due to the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident, the evacuees from Namie Town still cannot reside in the town, and some continue to live in temporary housing units. In this study, the radon activity concentrations were measured at temporary housing facilities, apartments and detached houses in Fukushima Prefecture in order to estimate the annual internal exposure dose of residents. A passive radon–thoron monitor (using a CR-39) and a pulse-type ionization chamber were used to evaluate the radon activity concentration. The average radon activity concentrations at temporary housing units, including a medical clinic, apartments and detached houses, were 5, 7 and 9 Bq m −3 , respectively. Assuming the residents lived in these facilities for one year, the average annual effective doses due to indoor radon in each housing type were evaluated as 0.18, 0.22 and 0.29 mSv, respectively. The average effective doses to all residents in Fukushima Prefecture due to natural and artificial sources were estimated using the results of the indoor radon measurements and published data. The average effective dose due to natural sources for the evacuees from Namie Town was estimated to be 1.9 mSv. In comparison, for the first year after the FDNPP accident, the average effective dose for the evacuees due to artificial sources from the accident was 5.0 mSv. Although residents' internal and external exposures due to natural radionuclides cannot be avoided, it might be possible to lower external exposure due to the artificial radionuclides by changing some behaviors of residents.

Download Full-text

Assessment of annual average effective dose status in the cohort of medical staff in Lithuania during 1991–2013

Radiation Protection Dosimetry ◽

10.1093/rpd/ncu368 ◽

2015 ◽

Vol 167 (4) ◽

pp. 671-677 ◽

Cited By ~ 3

Author(s):

Vitalija Samerdokiene ◽

Albinas Mastauskas ◽

Vydmantas Atkocius

Keyword(s):

Effective Dose ◽

Medical Staff ◽

Annual Average ◽

Average Effective Dose

Download Full-text

Natural Radioactivity Measurement in Soil Samples From The New Kufa University Location, Iraq

JOURNAL OF ADVANCES IN PHYSICS ◽

10.24297/jap.v3i2.2076 ◽

2013 ◽

Vol 3 (2) ◽

pp. 232-240 ◽

Cited By ~ 1

Author(s):

Heiyam Najy Majeed ◽

Ali . K. Hasan

Keyword(s):

Effective Dose ◽

Dose Rate ◽

Activity Concentration ◽

Annual Effective Dose ◽

Absorbed Dose ◽

Soil Samples ◽

Absorbed Dose Rate ◽

World Average ◽

Two Samples ◽

The World

Al-Najaf Al-Ashraf city on of the most important cities in Iraqi country it was chosen as the cultural Islamic capital for 2012 by the Islamic world ,Kufa university will be played big role of liability, cultural and education efficacies, this city had been exposed to artillery bombard expand along different areas in 1991 and 2003 in our research we try to test the studying area to know The total absorbed dose rate and the most possible hazards for this reasons the study was done. The natural radiation of thirty two samples of soil which collected randomly in June 2012 from the new Kufa University location were measured using Na(Tl) detection. The mean values activity concentrations of 238U, 232Th and 40K was (25.73±11.23 , 3.72±0.81 and 165.16±9.39 ) Bq kg-1 respectively . The highest value of the Radium equivalent activity was (30.870) Bq.kg–1 in (S2) which mean that all the soil samples values lower than (370Bq kg-1) the world average . External and internal hazard and gamma activity concentration (representative level index) indexes were lower than unity for all samples . The average value of absorbed dose rate calculated from activity concentration of 238U , 232Th and 40K was (20.553) nGy h-1 this value coincident to recommended. Annual effective dose in (?Sv/y) varies from (36.912) (?Sv/y) in (S15) to (15.460) (?Sv/y) in (S8) , all the soil samples have the annual effective dose less than the world average 460 (?Sv/y). The results can be consider as base values for distribution of natural radionuclides in the region and will be used as references information to assess any changed in the radioactive background level due to geological processes.

Download Full-text