Assessment of Discharged 222Rn at Surface from Ventilation Shafts of Underground Uranium Mine at Narwapahar in India

IF 1 4区工程技术 Q4 INSTRUMENTS & INSTRUMENTATION

MAPAN Pub Date : 2023-12-30 DOI:10.1007/s12647-023-00726-x

V. S. Srivastava, S. K. Jha, M. S. Kulkarni

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Abstract

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.

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印度 Narwapahar 地下铀矿通风井向地表排放 222Rn 的评估

对贾坎德邦 Narwapahar 地下铀矿的大气排放物进行了测量，以评估从矿井通风井向地表排放的 222Rn 量。据估计，铀矿通风井的年大气排放量约为 6 × 109 立方米，相关氡（222Rn）活度约为 2.3 × 1013 贝克勒尔。通过地下铀矿向露天大气排放如此大量的放射性物质，我们一直在考虑评估居住在周围村庄的公众是否会受到辐射。认识到氡暴露对健康的危害不可忽视，本研究对地表排放空气中的氡浓度进行了测量。使用便携式氡测量装置（Alpha-guard）来测定氡含量。Alpha-guard 采用扩散模式测量 U 型矿井通风井附近的氡浓度。研究结果表明，矿井废气中氡的排放范围仅限于矿井排放点 100 米以内（矿井内的无人区），不会影响附近村庄公共场所居民的吸入危害。

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来源期刊

MAPAN 工程技术-物理：应用

CiteScore

2.30

自引率

20.00%

发文量

审稿时长

3 months

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.