{"title":"印度 Narwapahar 地下铀矿通风井向地表排放 222Rn 的评估","authors":"V. S. Srivastava, S. K. Jha, M. S. Kulkarni","doi":"10.1007/s12647-023-00726-x","DOIUrl":null,"url":null,"abstract":"<div><p>Measurements of atmospheric release from underground uranium mine at Narwapahar in state of Jharkhand has been done to assess the discharged <sup>222</sup>Rn at surface from ventilation shafts of mine. Annual volume of atmospheric discharge has been estimated around 6 × 10<sup>9</sup> m<sup>3</sup> from ventilation shafts of mine with associated radon (<sup>222</sup>Rn) activity around 2.3 × 10<sup>13</sup> Becquerel. Such a huge amount of radioactivity discharge in open atmosphere through underground uranium mine is always under consideration to assess the exposure of public residing in surrounding villages, if any. Realizing the non-negligible health hazards due to radon exposure, the present study has been carried out to measure the radon concentrations in surface discharged air. A portable radon-measuring device (Alpha-guard) is used to determine the radon levels. Alpha-guard is used in diffusion mode for the measurements of radon concentration in the vicinity of ventilation shafts of the U-mine. The study reveals that the discharge of radon from mine exhaust is confined within 100 m of the discharge point of the mine (in no man area within mine premises) and it does not affect the inhalation hazards to inhabitants residing in public domain in nearby villages.</p></div>","PeriodicalId":689,"journal":{"name":"MAPAN","volume":"39 1","pages":"149 - 155"},"PeriodicalIF":1.0000,"publicationDate":"2023-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12647-023-00726-x.pdf","citationCount":"0","resultStr":"{\"title\":\"Assessment of Discharged 222Rn at Surface from Ventilation Shafts of Underground Uranium Mine at Narwapahar in India\",\"authors\":\"V. S. Srivastava, S. K. Jha, M. S. Kulkarni\",\"doi\":\"10.1007/s12647-023-00726-x\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Measurements of atmospheric release from underground uranium mine at Narwapahar in state of Jharkhand has been done to assess the discharged <sup>222</sup>Rn at surface from ventilation shafts of mine. Annual volume of atmospheric discharge has been estimated around 6 × 10<sup>9</sup> m<sup>3</sup> from ventilation shafts of mine with associated radon (<sup>222</sup>Rn) activity around 2.3 × 10<sup>13</sup> Becquerel. Such a huge amount of radioactivity discharge in open atmosphere through underground uranium mine is always under consideration to assess the exposure of public residing in surrounding villages, if any. Realizing the non-negligible health hazards due to radon exposure, the present study has been carried out to measure the radon concentrations in surface discharged air. A portable radon-measuring device (Alpha-guard) is used to determine the radon levels. Alpha-guard is used in diffusion mode for the measurements of radon concentration in the vicinity of ventilation shafts of the U-mine. The study reveals that the discharge of radon from mine exhaust is confined within 100 m of the discharge point of the mine (in no man area within mine premises) and it does not affect the inhalation hazards to inhabitants residing in public domain in nearby villages.</p></div>\",\"PeriodicalId\":689,\"journal\":{\"name\":\"MAPAN\",\"volume\":\"39 1\",\"pages\":\"149 - 155\"},\"PeriodicalIF\":1.0000,\"publicationDate\":\"2023-12-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/s12647-023-00726-x.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"MAPAN\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s12647-023-00726-x\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"INSTRUMENTS & INSTRUMENTATION\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"MAPAN","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s12647-023-00726-x","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"INSTRUMENTS & INSTRUMENTATION","Score":null,"Total":0}
Assessment of Discharged 222Rn at Surface from Ventilation Shafts of Underground Uranium Mine at Narwapahar in India
Measurements of atmospheric release from underground uranium mine at Narwapahar in state of Jharkhand has been done to assess the discharged 222Rn at surface from ventilation shafts of mine. Annual volume of atmospheric discharge has been estimated around 6 × 109 m3 from ventilation shafts of mine with associated radon (222Rn) activity around 2.3 × 1013 Becquerel. Such a huge amount of radioactivity discharge in open atmosphere through underground uranium mine is always under consideration to assess the exposure of public residing in surrounding villages, if any. Realizing the non-negligible health hazards due to radon exposure, the present study has been carried out to measure the radon concentrations in surface discharged air. A portable radon-measuring device (Alpha-guard) is used to determine the radon levels. Alpha-guard is used in diffusion mode for the measurements of radon concentration in the vicinity of ventilation shafts of the U-mine. The study reveals that the discharge of radon from mine exhaust is confined within 100 m of the discharge point of the mine (in no man area within mine premises) and it does not affect the inhalation hazards to inhabitants residing in public domain in nearby villages.
期刊介绍：
MAPAN-Journal Metrology Society of India is a quarterly publication. It is exclusively devoted to Metrology (Scientific, Industrial or Legal). It has been fulfilling an important need of Metrologists and particularly of quality practitioners by publishing exclusive articles on scientific, industrial and legal metrology.
The journal publishes research communication or technical articles of current interest in measurement science; original work, tutorial or survey papers in any metrology related area; reviews and analytical studies in metrology; case studies on reliability, uncertainty in measurements; and reports and results of intercomparison and proficiency testing.
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