People travelling by air will receive more exposure dose and by water will receive less one.According to statistic data from the Ministry of Communications in 1988,the turnover in that year was abode 2×1010 man&#...People travelling by air will receive more exposure dose and by water will receive less one.According to statistic data from the Ministry of Communications in 1988,the turnover in that year was abode 2×1010 man·km.The total number of fishermen for inshore fishing was nearly two million reported by Ministry of Agriculture,Animal Husbandry and Fishery.Based on measured data on 212 points in six typical shipping lines of inshore lines and inland rivers,and the total voyage is 5625km,the average natural radiation dose rate received by travellers was calculated.Worn that assessment of collective effective dose for passengers by Water and fishermen was derived.The value is 32.7 man.Sv for passengers and 265.3 man.Sv for fishermen.展开更多
Objective:In order to understand the complete scenario of the effectiveness of radiation protection practice in the workplace,especially in the industrial radiography and also to analyze the trends with other related ...Objective:In order to understand the complete scenario of the effectiveness of radiation protection practice in the workplace,especially in the industrial radiography and also to analyze the trends with other related studies,epidemiological studies and legal purposes,the assessment and register of the effective dose plays a significant role.Therefore,efforts have been given in the assessment of collective effective dose,mean effective dose,prediction of lifetime cancer risk,and contribution of different age group workers in the collective effective dose.Methods:The occupational radiation exposures for 472 workers were investigated in industrial radiography throughout Bangladesh from 2015 to 2018 by using thermoluminescent dosimeter(TLD).By using a Harshaw TLD reader(Model-4500),the effective dose was measured in a quarterly basis throughout the year.Based on the value of personal dose equivalent Hp(10),database was prepared and recorded.Results:The collective effective dose was 36.1,40.7,28.8 and 37.5 man⋅mSv among 105,102,100 and 165 radiation workers in 2015,2016,2017 and 2018,respectively.The maximum effective dose received by radiation workers was 6.0,7.1,6.9 and 19.9 mSv in 2015,2016,2017 and 2018,respectively,which remained within the stipulated dose limits imposed by Nuclear Safety and Radiation Control(NSRC)Rules-1997,Bangladesh and International Commission on Radiological Protection(ICRP-103).Conclusion:This kind of monitoring would help to construct a national database that will be used by the end users to improve their implementation of optimization in occupational radiation protection in industrial radiography.展开更多
文摘People travelling by air will receive more exposure dose and by water will receive less one.According to statistic data from the Ministry of Communications in 1988,the turnover in that year was abode 2×1010 man·km.The total number of fishermen for inshore fishing was nearly two million reported by Ministry of Agriculture,Animal Husbandry and Fishery.Based on measured data on 212 points in six typical shipping lines of inshore lines and inland rivers,and the total voyage is 5625km,the average natural radiation dose rate received by travellers was calculated.Worn that assessment of collective effective dose for passengers by Water and fishermen was derived.The value is 32.7 man.Sv for passengers and 265.3 man.Sv for fishermen.
文摘Objective:In order to understand the complete scenario of the effectiveness of radiation protection practice in the workplace,especially in the industrial radiography and also to analyze the trends with other related studies,epidemiological studies and legal purposes,the assessment and register of the effective dose plays a significant role.Therefore,efforts have been given in the assessment of collective effective dose,mean effective dose,prediction of lifetime cancer risk,and contribution of different age group workers in the collective effective dose.Methods:The occupational radiation exposures for 472 workers were investigated in industrial radiography throughout Bangladesh from 2015 to 2018 by using thermoluminescent dosimeter(TLD).By using a Harshaw TLD reader(Model-4500),the effective dose was measured in a quarterly basis throughout the year.Based on the value of personal dose equivalent Hp(10),database was prepared and recorded.Results:The collective effective dose was 36.1,40.7,28.8 and 37.5 man⋅mSv among 105,102,100 and 165 radiation workers in 2015,2016,2017 and 2018,respectively.The maximum effective dose received by radiation workers was 6.0,7.1,6.9 and 19.9 mSv in 2015,2016,2017 and 2018,respectively,which remained within the stipulated dose limits imposed by Nuclear Safety and Radiation Control(NSRC)Rules-1997,Bangladesh and International Commission on Radiological Protection(ICRP-103).Conclusion:This kind of monitoring would help to construct a national database that will be used by the end users to improve their implementation of optimization in occupational radiation protection in industrial radiography.
