Pub Date : 2014-01-01DOI: 10.1504/IJLR.2014.068282
R. Fardid, M. Toossi, Abdolrahim Rezaee, Ariane Sadr Nabavi, H. Rafatpanah
Ionising radiation can cause different forms of DNA damage in living cells. Changes in biomarkers due to exposure to ionising radiation can be an appropriate tool for the immediate recognition of individuals exposed to radiation after a radiological accident or nuclear disaster. QPCR technique, as an approved method, was used for analysing the expression levels of sensitive genes following radiation exposure. Gene expression studies were performed on a group of 36 radiation workers and 36 matched–normal people without a history of radiation exposure. Mean gene expression values for control and irradiated groups were compared. There was significant difference between the mean gene expression of IFNg (p < 0.05), also significant difference was observed between the gene expression of TGFb1 (p < 0.05) in normal and irradiated groups. The logistic regression model is able to correctly identify 72.2% of irradiated samples (sensitivity) and 80.6% of normal samples (specificity).
{"title":"Expression of IFNg and TGFb1 genes can distinguish radiation workers from the normal population","authors":"R. Fardid, M. Toossi, Abdolrahim Rezaee, Ariane Sadr Nabavi, H. Rafatpanah","doi":"10.1504/IJLR.2014.068282","DOIUrl":"https://doi.org/10.1504/IJLR.2014.068282","url":null,"abstract":"Ionising radiation can cause different forms of DNA damage in living cells. Changes in biomarkers due to exposure to ionising radiation can be an appropriate tool for the immediate recognition of individuals exposed to radiation after a radiological accident or nuclear disaster. QPCR technique, as an approved method, was used for analysing the expression levels of sensitive genes following radiation exposure. Gene expression studies were performed on a group of 36 radiation workers and 36 matched–normal people without a history of radiation exposure. Mean gene expression values for control and irradiated groups were compared. There was significant difference between the mean gene expression of IFNg (p < 0.05), also significant difference was observed between the gene expression of TGFb1 (p < 0.05) in normal and irradiated groups. The logistic regression model is able to correctly identify 72.2% of irradiated samples (sensitivity) and 80.6% of normal samples (specificity).","PeriodicalId":14141,"journal":{"name":"International Journal of Low Radiation","volume":"9 1","pages":"396"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJLR.2014.068282","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66669241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.1504/IJLR.2014.068259
Alfred Sello Likuku, N. Karunakara, G. P. Nthoiwa
This paper reports the γ–radiation levels of the naturally occurring 40K, 210Pb, 232Th and 226Ra and the anthropogenic 137Cs in the eastern part of Botswana so as to assess their possible dose impact to the members of the public in the area. The radium equivalent activity was (175±24) Bq/kg, and thus below the allowed maximum value of 370 Bq/kg. The total absorbed rate ranged from 24.12 nGy/h to 215.44 nGy/h with the mean of (81.36±10.58) nGy/h. The outdoor annual effective dose ranged from 0.030 mSv/y to 0.264 mSv/y with an average value of (0.10±0.01) mSv/y. The obtained values are comparable with world–wide averages. Results from this study can be used to serve as baseline data for the study area, which can also be used as reference information to assess any changes in radioactivity background possibly due to the artificial influences.
{"title":"Assessment of γ–radiation levels and associated dose rates from surface soils in the eastern part of Botswana","authors":"Alfred Sello Likuku, N. Karunakara, G. P. Nthoiwa","doi":"10.1504/IJLR.2014.068259","DOIUrl":"https://doi.org/10.1504/IJLR.2014.068259","url":null,"abstract":"This paper reports the γ–radiation levels of the naturally occurring 40K, 210Pb, 232Th and 226Ra and the anthropogenic 137Cs in the eastern part of Botswana so as to assess their possible dose impact to the members of the public in the area. The radium equivalent activity was (175±24) Bq/kg, and thus below the allowed maximum value of 370 Bq/kg. The total absorbed rate ranged from 24.12 nGy/h to 215.44 nGy/h with the mean of (81.36±10.58) nGy/h. The outdoor annual effective dose ranged from 0.030 mSv/y to 0.264 mSv/y with an average value of (0.10±0.01) mSv/y. The obtained values are comparable with world–wide averages. Results from this study can be used to serve as baseline data for the study area, which can also be used as reference information to assess any changes in radioactivity background possibly due to the artificial influences.","PeriodicalId":14141,"journal":{"name":"International Journal of Low Radiation","volume":"9 1","pages":"344"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJLR.2014.068259","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66668998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.1504/ijlr.2014.063408
Abdulrahman I. Alabdula, N. Aly
{"title":"Laboratory investigation on the removal of radium from groundwater by Ba(Ra)SO 4 co-precipitation","authors":"Abdulrahman I. Alabdula, N. Aly","doi":"10.1504/ijlr.2014.063408","DOIUrl":"https://doi.org/10.1504/ijlr.2014.063408","url":null,"abstract":"","PeriodicalId":14141,"journal":{"name":"International Journal of Low Radiation","volume":"9 1","pages":"241"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/ijlr.2014.063408","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66668708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.1504/IJLR.2014.068281
K. W. Fornalski
In this paper a full description of the mechanistic model of the cells irradiation is presented. The model is based on the computational Quasi–Markov Chain Monte Carlo method with a stochastic tree of probabilities and using the biophysical input. The biophysics of the cells is described by the probabilities and probability distributions provided as an input. Many biophysical aspects are implemented into the model, i.e. the adaptive response effect or the bystander effect. It results in the sigmoidal relationships for carcinogenic risk as a function of the irradiation. The methodology used makes the model universal and practical for the simulations of general processes. However, the presented theoretical model does not describe the real cells and tissues. Also the exposure geometry, type of radiation as well as microdosimetry are not taken into account in this model. The model is focused mainly on the creation of general and maximal wide mathematical description of irradiated hypothetical cells treated as complex physical systems.
{"title":"Mechanistic model of the cells irradiation using the stochastic biophysical input","authors":"K. W. Fornalski","doi":"10.1504/IJLR.2014.068281","DOIUrl":"https://doi.org/10.1504/IJLR.2014.068281","url":null,"abstract":"In this paper a full description of the mechanistic model of the cells irradiation is presented. The model is based on the computational Quasi–Markov Chain Monte Carlo method with a stochastic tree of probabilities and using the biophysical input. The biophysics of the cells is described by the probabilities and probability distributions provided as an input. Many biophysical aspects are implemented into the model, i.e. the adaptive response effect or the bystander effect. It results in the sigmoidal relationships for carcinogenic risk as a function of the irradiation. The methodology used makes the model universal and practical for the simulations of general processes. However, the presented theoretical model does not describe the real cells and tissues. Also the exposure geometry, type of radiation as well as microdosimetry are not taken into account in this model. The model is focused mainly on the creation of general and maximal wide mathematical description of irradiated hypothetical cells treated as complex physical systems.","PeriodicalId":14141,"journal":{"name":"International Journal of Low Radiation","volume":"9 1","pages":"370"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJLR.2014.068281","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66669230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.1504/IJLR.2014.068277
S. Al-Omari
The indoor radon concentrations in rooms of different floors in Irbid city in Jordan ranged from 8 to 50 Bq m−3 with an annual mean of 23 Bqm−3, which is less than the recommended action level. The average values of indoor radon concentrations in all investigated dwellings for basement floor, first floor, second floor, third floor and fourth floor were 36.13, 27.85, 21.24, 15.83 and 12.86 Bq m−3, respectively. The average annual effective dose is 0.318 mSv y−1 which is within the safe limits. Risk of lung cancer from the chronic exposure of the inhaled radon progeny may cause lung cancer of 6 cases per year per million person in Irbid city. Despite that the lung cancer, which is attributed to radon inhalation, forms about 5.7% of the total lung cancers, it is still a small ratio compared to risk of lung cancer caused by cigarette smoking and other factors which is 94.3%.
{"title":"Assessment of indoor radon levels and associated hazards: effects of floor levels in residential buildings","authors":"S. Al-Omari","doi":"10.1504/IJLR.2014.068277","DOIUrl":"https://doi.org/10.1504/IJLR.2014.068277","url":null,"abstract":"The indoor radon concentrations in rooms of different floors in Irbid city in Jordan ranged from 8 to 50 Bq m−3 with an annual mean of 23 Bqm−3, which is less than the recommended action level. The average values of indoor radon concentrations in all investigated dwellings for basement floor, first floor, second floor, third floor and fourth floor were 36.13, 27.85, 21.24, 15.83 and 12.86 Bq m−3, respectively. The average annual effective dose is 0.318 mSv y−1 which is within the safe limits. Risk of lung cancer from the chronic exposure of the inhaled radon progeny may cause lung cancer of 6 cases per year per million person in Irbid city. Despite that the lung cancer, which is attributed to radon inhalation, forms about 5.7% of the total lung cancers, it is still a small ratio compared to risk of lung cancer caused by cigarette smoking and other factors which is 94.3%.","PeriodicalId":14141,"journal":{"name":"International Journal of Low Radiation","volume":"9 1","pages":"355"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJLR.2014.068277","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66669009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-08-01DOI: 10.1504/IJLR.2013.055609
R. Fardid, M. Toossi, Mohammad Mehrpouyan, M. Ghorbani
Several studies have revealed that interventional radiography procedures performed in cardiology departments are high dose techniques. In this study, effective dose of cardiologists working in hospitals Catheterisation Laboratories (CATHLABs) in Mashhad city have been measured during Coronary Angiography (CA) and Percutaneous Transluminal Coronary Angioplasty (PTCA) procedures. In order to measure the dose per procedure and to estimate monthly effective dose of cardiologists, Electronic Personal Dosimeters (EPDs) were worn by 33 cardiologists over the apron on the collar. Mean effective dose of cardiologists per procedure was equal to 2.7 μSv (range: 0.3–14.3 μSv) for CA and 6.4 μSv (range: 1.3–27.5 μSv) for PTCA procedures. Mean monthly effective dose in cardiologists was equal to 158.3 μSv (range: 8.3–1050 μSv). According to the data obtained in this study the effective dose estimated for all cardiologists was lower than the monthly limits recommended by International Commission on Radiological Protection (ICRP).
{"title":"Evaluation of occupational radiation exposure of cardiologists in interventional radiography in Mashhad CATHLABs","authors":"R. Fardid, M. Toossi, Mohammad Mehrpouyan, M. Ghorbani","doi":"10.1504/IJLR.2013.055609","DOIUrl":"https://doi.org/10.1504/IJLR.2013.055609","url":null,"abstract":"Several studies have revealed that interventional radiography procedures performed in cardiology departments are high dose techniques. In this study, effective dose of cardiologists working in hospitals Catheterisation Laboratories (CATHLABs) in Mashhad city have been measured during Coronary Angiography (CA) and Percutaneous Transluminal Coronary Angioplasty (PTCA) procedures. In order to measure the dose per procedure and to estimate monthly effective dose of cardiologists, Electronic Personal Dosimeters (EPDs) were worn by 33 cardiologists over the apron on the collar. Mean effective dose of cardiologists per procedure was equal to 2.7 μSv (range: 0.3–14.3 μSv) for CA and 6.4 μSv (range: 1.3–27.5 μSv) for PTCA procedures. Mean monthly effective dose in cardiologists was equal to 158.3 μSv (range: 8.3–1050 μSv). According to the data obtained in this study the effective dose estimated for all cardiologists was lower than the monthly limits recommended by International Commission on Radiological Protection (ICRP).","PeriodicalId":14141,"journal":{"name":"International Journal of Low Radiation","volume":"9 1","pages":"160"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJLR.2013.055609","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66669052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-08-01DOI: 10.1504/IJLR.2013.055608
C. Silva, J. N. Tabosa, C. C. Júnior, C. A. Filho, J. A. S. Neto
The purpose of this of this research is to determine 228Ra, 226Ra and 210Pb concentrations in the water and sediment of the Sao Francisco River, nearby from farms producing fruits in Petrolina City. Concentrations of 228Ra, 210Pb and 226Ra in the water samples varied from < 19.0 (detection limit) to 22.0 mBq.l–1; < 4.0 (detection limit) to 13.0 mBq.l–1; and 12.0 to 42.0 mBq.l–1, respectively. For sediments samples, in this order, the concentrations ranged from < 7.0 (detection limit) to 35.0 Bq.kg–1; < 3.5 (detection limit) to 15.0 Bq.kg–1; and 12.0 to 92 Bq.kg–1. These results indicate that there are spots in Sao Francisco Rive, Petrolina, which have high concentrations of 228Ra, 226Ra and 210Pb in sediments.
{"title":"228 Ra, 226 Ra and 210 Pb in sediment and water of the São Francisco River in Petrolina-PE/Brazil","authors":"C. Silva, J. N. Tabosa, C. C. Júnior, C. A. Filho, J. A. S. Neto","doi":"10.1504/IJLR.2013.055608","DOIUrl":"https://doi.org/10.1504/IJLR.2013.055608","url":null,"abstract":"The purpose of this of this research is to determine 228Ra, 226Ra and 210Pb concentrations in the water and sediment of the Sao Francisco River, nearby from farms producing fruits in Petrolina City. Concentrations of 228Ra, 210Pb and 226Ra in the water samples varied from < 19.0 (detection limit) to 22.0 mBq.l–1; < 4.0 (detection limit) to 13.0 mBq.l–1; and 12.0 to 42.0 mBq.l–1, respectively. For sediments samples, in this order, the concentrations ranged from < 7.0 (detection limit) to 35.0 Bq.kg–1; < 3.5 (detection limit) to 15.0 Bq.kg–1; and 12.0 to 92 Bq.kg–1. These results indicate that there are spots in Sao Francisco Rive, Petrolina, which have high concentrations of 228Ra, 226Ra and 210Pb in sediments.","PeriodicalId":14141,"journal":{"name":"International Journal of Low Radiation","volume":"9 1","pages":"147"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJLR.2013.055608","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66669035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-08-01DOI: 10.1504/IJLR.2013.055597
D. Al-Azmi
A study was carried out on the performance of some handheld dosimeters that are used for measuring ambient gamma dose rates. A CsI scintillation-based and two GM-based dosimeters were used to measure the absorbed dose rates in an indoor environment, inside a lead shield, on different floors of a building, in a desert environment and in a boat on the Arabian Gulf. The study showed that while some instruments provide measurements of ambient gamma dose rates, which include contributions from both terrestrial and cosmic radiation components, others show the terrestrial/indoor gamma dose rate only. Tests also showed that some dosimeters may fail to operate in the very low background radiation environments unless a radioactive source is used for the start-up.
{"title":"Performance of some handheld dosimeters used for gamma-ray ambient dose rate measurements","authors":"D. Al-Azmi","doi":"10.1504/IJLR.2013.055597","DOIUrl":"https://doi.org/10.1504/IJLR.2013.055597","url":null,"abstract":"A study was carried out on the performance of some handheld dosimeters that are used for measuring ambient gamma dose rates. A CsI scintillation-based and two GM-based dosimeters were used to measure the absorbed dose rates in an indoor environment, inside a lead shield, on different floors of a building, in a desert environment and in a boat on the Arabian Gulf. The study showed that while some instruments provide measurements of ambient gamma dose rates, which include contributions from both terrestrial and cosmic radiation components, others show the terrestrial/indoor gamma dose rate only. Tests also showed that some dosimeters may fail to operate in the very low background radiation environments unless a radioactive source is used for the start-up.","PeriodicalId":14141,"journal":{"name":"International Journal of Low Radiation","volume":"9 1","pages":"95"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJLR.2013.055597","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66668867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-08-01DOI: 10.1504/IJLR.2013.055606
R. Nylund, Elina Lemola, E. Eklund, A. Hakanen, D. Leszczyński
Epidemiological studies have shown that moderate and low radiation doses to the heart area may result in an increase in cardiovascular mortality. It has been suggested that cardiovascular endothelium could be one of the targets for the ionising radiation-induced heart injury. We have used human endothelial cells as an in vitro model to study immediate effects of ionising radiation on endothelium. Cells were exposed to low and moderate doses of γ-radiation, and short-term protein expression profiles were examined. Proteomics analysis did not show significant changes in the examined protein expression profiles after the γ-irradiation in any of the examined conditions. The molecular level cellular damage was verified by examining phosphorylation of tumour suppressor p53 binding protein 1, which was dose- and time-dependent. Further examination of cellular proteome and phosphoproteome, using more sensitive quantification and detection techniques, is warranted and might reveal changes, which were not detected in this study.
{"title":"The lack of acute effect of low-to-moderate-dose ionising radiation on endothelial proteome","authors":"R. Nylund, Elina Lemola, E. Eklund, A. Hakanen, D. Leszczyński","doi":"10.1504/IJLR.2013.055606","DOIUrl":"https://doi.org/10.1504/IJLR.2013.055606","url":null,"abstract":"Epidemiological studies have shown that moderate and low radiation doses to the heart area may result in an increase in cardiovascular mortality. It has been suggested that cardiovascular endothelium could be one of the targets for the ionising radiation-induced heart injury. We have used human endothelial cells as an in vitro model to study immediate effects of ionising radiation on endothelium. Cells were exposed to low and moderate doses of γ-radiation, and short-term protein expression profiles were examined. Proteomics analysis did not show significant changes in the examined protein expression profiles after the γ-irradiation in any of the examined conditions. The molecular level cellular damage was verified by examining phosphorylation of tumour suppressor p53 binding protein 1, which was dose- and time-dependent. Further examination of cellular proteome and phosphoproteome, using more sensitive quantification and detection techniques, is warranted and might reveal changes, which were not detected in this study.","PeriodicalId":14141,"journal":{"name":"International Journal of Low Radiation","volume":"9 1","pages":"127"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJLR.2013.055606","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66668972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-08-01DOI: 10.1504/IJLR.2013.055603
M. Al-janabi, M. Jaafar, A. Ramizy, K. Omar, Yaman Walid Kassab
The indoor radon gas released from concrete was measured using a 0.65 × 0.65 × 0.65 m fabricated concrete slab room, simulating a workplace. The indoor radon gas concentration was monitored, and the remediation method was examined. Radon concentrations were monitored using Radon Monitor Model 1023 from Sun Nuclear. Results show that average radon concentrations reached 111 Bq.m–3 before remediation, beyond the World Health Organization’s acceptable limit of 100 Bq.m–3. Hence, two layers of high-performance waterborne epoxy resin TRU-GLAZE-WB 4030 coating were applied, reducing the radon concentration average to an acceptable level of 14.8 Bq.m–3. Interestingly, the indoor radon concentrations were measured two months after applying the remediation and were found to be stable and within acceptable levels.
{"title":"Mitigation of workplace radon gas concentration using high-performance epoxy resin coating","authors":"M. Al-janabi, M. Jaafar, A. Ramizy, K. Omar, Yaman Walid Kassab","doi":"10.1504/IJLR.2013.055603","DOIUrl":"https://doi.org/10.1504/IJLR.2013.055603","url":null,"abstract":"The indoor radon gas released from concrete was measured using a 0.65 × 0.65 × 0.65 m fabricated concrete slab room, simulating a workplace. The indoor radon gas concentration was monitored, and the remediation method was examined. Radon concentrations were monitored using Radon Monitor Model 1023 from Sun Nuclear. Results show that average radon concentrations reached 111 Bq.m–3 before remediation, beyond the World Health Organization’s acceptable limit of 100 Bq.m–3. Hence, two layers of high-performance waterborne epoxy resin TRU-GLAZE-WB 4030 coating were applied, reducing the radon concentration average to an acceptable level of 14.8 Bq.m–3. Interestingly, the indoor radon concentrations were measured two months after applying the remediation and were found to be stable and within acceptable levels.","PeriodicalId":14141,"journal":{"name":"International Journal of Low Radiation","volume":"9 1","pages":"119"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJLR.2013.055603","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66668959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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