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Determination and Inter-Comparison of 238U and 232Th in Zircon Sand Using Gamma Spectrometry 利用伽马能谱仪测定和相互比较锆石砂中的 238U 和 232Th
IF 1 4区 工程技术 Q4 INSTRUMENTS & INSTRUMENTATION Pub Date : 2024-01-10 DOI: 10.1007/s12647-023-00723-0
Nitin Kumari, K. Vishwa Prasad, A. Y. Balbudhe, N. Sai Krishna, S. K. Jha, M. S. Kulkarni

An inter-comparison exercise is a quality control tool to standardize a laboratory and was performed between HPU lab at Nuclear Fuel Complex and RPS (NF) lab at Bhabha Atomic Research Centre to determine and compare the concentration of primordial radionuclides in a zircon sample received from Health Physics Unit (HPU), Indian Rare Earth Limited Manavalakurichi weighing 470 g. RPS (NF) lab is annually participating in international inter-comparison exercise conducted by IAEA and is a nodal laboratory for the in-house inter-laboratory comparison exercise. Thus, its values are considered true values. The measured concentrations for 238U and 232Th in zircon sample do not vary considerably as 0.37% variation is observed in true value and measured value of 238U and 0.32% variation is observed in true value and measured value of 232Th. U score is also calculated from the results obtained where it is found to be 0.124 for 238U and 0.195 for 232Th. Trueness and precision tests are also performed, and the laboratory results are found to be “acceptable”. It represents that the laboratory performance is evaluated as satisfactory and does not significantly differ from the expected values as per the statistical tools. This ensures that the analytical measurement results of the laboratory are reliable and traceable to reference standard laboratory.

实验室间比对工作是一种质量控制工具,用于规范实验室。核燃料联合企业的核 物理实验室和巴哈原子研究中心的 RPS(NF)实验室开展了这项工作,以确定和比 较印度稀土有限公司 Manavalakurichi 健康物理室提供的重达 470 克的锆石样品中原始 放射性核素的浓度。RPS(NF)实验室每年都参加国际原子能机构举办的国际实验室间比对活动,并且是内部实验室间比对活动的节点实验室。因此,其数值被视为真实值。锆石样本中 238U 和 232Th 的测量浓度差异不大,238U 的真实值与测量值的差异为 0.37%,232Th 的真实值与测量值的差异为 0.32%。根据所得结果还计算出 U 分数,发现 238U 为 0.124,232Th 为 0.195。还进行了真实性和精确性测试,发现实验室结果是 "可接受的"。这表示实验室的表现被评为令人满意,与统计工具的预期值没有显著差异。这确保了实验室的分析测量结果是可靠的,并可追溯到参考标准实验室。
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引用次数: 0
Preparation of Indigenous Radioactive Air Filter Standard for Gamma Spectrometry 制备伽马能谱仪用本地放射性空气过滤器标准物质
IF 1 4区 工程技术 Q4 INSTRUMENTS & INSTRUMENTATION Pub Date : 2024-01-10 DOI: 10.1007/s12647-023-00721-2
A. C. Patra, Pradyumna Lenka, V. K. Thakur, C. G. Sumesh, S. K. Jha, M. S. Kulkarni

Gamma spectrometry technique is regularly used for the quantification of different gamma-emitting radionuclides in environmental matrices and other synthetic samples. This is a non-destructive comparative technique which requires the usage of Certified Reference materials from International agencies like IAEA, NIST, etc. Limited availability and high cost of these Certified Reference materials pose a major hindrance in their acquisition by radiometric laboratories, motivating their indigenous preparation. A total of five sets of two types of filter papers and one blank were prepared by spiking with variable activity of 226Ra by gravimetric and volumetric measurements in a standard geometry. Efficiency of both filter paper standards together, varied from 19.7 to 20.3% in the selected geometry on HPGe-based high-resolution gamma spectrometry system. MDA values were also observed to be suitable for environmental air particulate measurements. The values of efficiencies and MDA obtained indicate that these air filter standards can qualify as candidate reference standards for regular gamma spectrometric counting of air particulates on filter paper media.

伽马能谱仪技术通常用于定量检测环境基质和其他合成样品中不同的伽马放射性核素。这是一种非破坏性比较技术,需要使用国际原子能机构(IAEA)、美国国家标准与技术研究院(NIST)等国际机构提供的认证参考材料。这些认证参考材料供应有限且价格昂贵,严重阻碍了辐射测量实验室对它们的获取,因此需要在本国进行制备。在标准几何形状中,通过重量和体积测量法向滤纸中添加不同活度的 226Ra,共制备了五套两种类型的滤纸和一块空白。在以 HPGe 为基础的高分辨率伽马能谱系统上,两种滤纸标准品在选定几何形状下的效率合计为 19.7% 至 20.3%。据观察,MDA 值也适用于环境空气微粒测量。所获得的效率值和 MDA 值表明,这些空气滤纸标准可以作为常规伽马能谱计数滤纸介质上空气微粒的候选参考标准。
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引用次数: 0
Advance Radiation Metrology Techniques and Related Applications 先进的辐射计量技术及相关应用
IF 1 4区 工程技术 Q4 INSTRUMENTS & INSTRUMENTATION Pub Date : 2024-01-10 DOI: 10.1007/s12647-023-00729-8
D. K. Aswal, S. K. Jha, A. C. Patra
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引用次数: 0
Proficiency in Determining 134Cs and 137Cs in Aquatic Samples Using Gamma Spectrometry 使用伽马能谱法测定水生样本中 134Cs 和 137Cs 的能力
IF 1 4区 工程技术 Q4 INSTRUMENTS & INSTRUMENTATION Pub Date : 2024-01-10 DOI: 10.1007/s12647-023-00712-3
A. C. Patra, Pradyumna Lenka, V. K. Thakur, C. G. Sumesh, S. K. Jha, M. S. Kulkarni

Participation in proficiency tests is an essential part of quality assurance activities for any laboratory involved in radiation metrology. Radioanalytical laboratory, Health Physics Division, BARC, regularly participates in national and international proficiency tests to demonstrate its radiometric capabilities for estimation of low-level natural and anthropogenic radionuclides in environmental matrices. The laboratory has been participating in annual IAEA Proficiency Tests conducted by Terrestrial Environmental Laboratory (TEL), IAEA, for estimation of natural radionuclides as well as fission and activation products in natural and spiked samples. This paper presents the results of estimation of 134Cs and 137Cs (two most important anthropogenic radionuclides that may be released from nuclear reactors during accident conditions) in spiked water samples in last five years of IAEA Proficiency Tests during 2018–2022. All results were lying well within 1σ level of the target values indicating the excellent analytical capability of this laboratory for analysis of 134Cs and 137Cs in aquatic environment.

摘要 参加能力测试是任何参与辐射计量的实验室质量保证活动的重要组成部分。巴卡拉哈研究中心健康物理部放射性分析实验室定期参加国家和国际能力测试,以展示其估算环境基质中低浓度天然和人为放射性核素的辐射计量能力。该实验室每年都参加由国际原子能机构地面环境实验室(TEL)举办的国际原子能机构能力测试,以估算天然样本和加标样本中的天然放射性核素以及裂变和活化产物。本文介绍了2018-2022年国际原子能机构近五年能力验证中对加标水样中134Cs和137Cs(核反应堆在事故条件下可能释放的两种最重要的人为放射性核素)的估算结果。所有结果均在目标值的1σ范围内,表明该实验室在分析水生环境中的134Cs和137Cs方面具有出色的分析能力。
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引用次数: 0
Indigenous Passive Personal Radon (222Rn) Dosimeter for Use in Uranium Mines of India 印度铀矿使用的本地被动式个人氡(222Rn)剂量计
IF 1 4区 工程技术 Q4 INSTRUMENTS & INSTRUMENTATION Pub Date : 2024-01-09 DOI: 10.1007/s12647-023-00714-1
V. N. Jha, S. K. Jha, Rajesh Kumar, R. L. Patnaik, M. K. Singh, M. S. Kulkarni, D. K. Aswal

Underground uranium mines, in particular, is associated with radiological conditions normally not anticipated in other mining industries. Depending on the grade and characteristics of the uranium deposit, the radiological hazard considerations may widely vary. Although short lived radon progeny are the major contributor of individual dose to the miners, dose assessment using their activity concentration data is normally avoided. Mine dust, diesel fumes, high humidity and seepage from the surrounding surface poses additional difficulty in direct estimation of radon progeny activity concentration. Individual doses are computed through radon (222Rn) monitoring data and equilibrium ratio (F) between radon and its short lived progeny. Both ambient and passive techniques are used in Indian uranium mines for the dose assessment but the passive technique is preferred over the ambient as the later can explicitly account the individual worker during its uses. The device, Personal Radon Dosimeter (PRD), based on nuclear track registry on a LR-115 Kotak film has indigenously been designed after detailed scientific studies. Basic features of this device, their uses, track registry and calibration aspects along with dose assessment methodology of uranium miners are provided in the paper.

尤其是地下铀矿,其放射性条件通常是其他采矿业无法预料的。根据铀矿床的等级和特征,放射性危害的考虑因素可能会有很大不同。虽然短寿命氡子体是矿工个人剂量的主要来源,但通常避免使用其放射性浓度数据进行剂量评估。矿尘、柴油烟雾、高湿度和周围地表的渗流给直接估算氡原活度浓度带来了额外的困难。个人剂量是通过氡(222Rn)监测数据和氡及其短寿命原体之间的平衡比(F)来计算的。在印度铀矿中,环境技术和被动技术都被用于剂量评估,但被动技术比环境技术更受欢迎,因为后者可以在使用过程中明确考虑到工人的个体情况。个人氡剂量计(PRD)装置基于 LR-115 Kotak 薄膜上的核轨道登记,是经过详细的科学研究后自行设计的。本文介绍了该装置的基本特征、用途、轨迹登记和校准方面以及铀矿工的剂量评估方法。
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引用次数: 0
Analysis of Radionuclide Partitioning at Various Stages of Processing of Ilmenite Ore Using HPGe Gamma-Ray Spectrometry 利用 HPGe 伽玛射线光谱仪分析钛铁矿各加工阶段的放射性核素分馏情况
IF 1 4区 工程技术 Q4 INSTRUMENTS & INSTRUMENTATION Pub Date : 2024-01-04 DOI: 10.1007/s12647-023-00728-9
S. V. Bara, M. R. Dhumale, S. Chinnaesakki, S. K. Jha, M. S. Kulkarni

This paper discusses the natural radioactivity levels in ilmenite ore and its final product. Two economically viable ores of titanium are ilmenite (FeO.TiO2) and rutile (TiO2). High-purity germanium (HPGe) detector was used to analyse samples of raw ore, its purified fraction and the final product (synthetic rutile). Radioactivity levels due to 238U and 232Th and its daughter products were estimated. The concentration of 238U and 232Th in raw ore, purified ore and synthetic rutile was found to be 204 ± 4 and 1208 ± 5, 89.0 ± 4 and 597.0 ± 4, 119 ± 2.5 and 398.0 ± 3 Bq/kg, respectively. The dose rates due to gamma photons estimated in raw ore and synthetic rutile were 572 nSv/h and 277 nSv/h, respectively. The activity index estimated was 5.3 for raw ore and 2.3 for final product (synthetic rutile). The final product contained only 25% of the radioactivity compared to the ore showing significant reduction in radioactivity due to the processing of the ore.

摘要 本文讨论了钛铁矿及其最终产品中的天然放射性水平。钛铁矿(FeO.TiO2)和金红石(TiO2)是两种经济上可行的钛矿石。使用高纯锗(HPGe)探测器对原矿、提纯部分和最终产品(合成金红石)样本进行分析。对 238U 和 232Th 及其子产品的放射性水平进行了估算。发现原矿、提纯矿和合成金红石中的 238U 和 232Th 浓度分别为 204 ± 4 和 1208 ± 5,89.0 ± 4 和 597.0 ± 4,119 ± 2.5 和 398.0 ± 3 Bq/kg。根据估算,原矿和合成金红石的伽马光子剂量率分别为 572 nSv/h 和 277 nSv/h。原矿和最终产品(合成金红石)的放射性活度指数分别为 5.3 和 2.3。与矿石相比,最终产品的放射性含量仅为矿石的 25%,这表明矿石加工过程大大降低了放射性。
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引用次数: 0
Correction: Review on Classification, Sources and Management of Road Dust and Determination of Uncertainty Associated with Measurement of Particle Size of Road Dust 更正:道路尘埃的分类、来源和管理综述以及道路尘埃粒径测量不确定性的确定
IF 1 4区 工程技术 Q4 INSTRUMENTS & INSTRUMENTATION Pub Date : 2024-01-03 DOI: 10.1007/s12647-023-00715-0
Tarang Kumar Gondwal, Papiya Mandal
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引用次数: 0
Study on Radioactivity Content in Soil Around Uranium Mineralised Region 铀矿化区域周边土壤放射性含量研究
IF 1 4区 工程技术 Q4 INSTRUMENTS & INSTRUMENTATION Pub Date : 2024-01-03 DOI: 10.1007/s12647-023-00724-z
Abhigyan Abhigyan, Ranjan Prakash, V. Kumaraswamy, B. Naresh, S. K. Jha

A study on natural radioactivity in soil around Tummalapalle uranium mineralised region was carried out. The aim of this study was to find the activity of primordial radionuclides 226Ra, 232Th and 40 K over the span of 5 years from 2018 to 2022 to understand the trend of activity of radionuclides in soil and impact of mining activities on the surrounding soil. The overall average activity of 226Ra, 232Th and 40 K over the years has been found to be 25 Bq/kg, 40 Bq/kg and 478 Bq/kg, respectively. The 226Ra and 232Th activities have been found to be less, whereas 40 K activity has been found to be slightly higher than the worldwide average of 32, 45 and 412 Bq/kg. The activity of radionuclides over the years does not show any increasing trend, which indicates that there is no impact of mining activities in the region on the soil in surrounding environment. Radium equivalent for soils was found to be 117.10 Bqkg−1, which is lower than the recommended limit of 370 Bqkg−1, and the annual effective external dose was found to be 345.56 µSvy−1, which is less than the worldwide average of 460 µSvy−1. External hazard index was found to be 0.35 Bq kg−1, which indicates insignificant radiation hazard from natural radionuclides in soil.

对图姆马拉帕勒铀矿化地区周围土壤中的天然放射性进行了研究。这项研究的目的是找出 2018 年至 2022 年 5 年间原始放射性核素 226Ra、232Th 和 40 K 的放射性活度,以了解土壤中放射性核素的放射性活度趋势以及采矿活动对周围土壤的影响。多年来,226Ra、232Th 和 40 K 的总体平均放射性活度分别为 25 Bq/kg、40 Bq/kg 和 478 Bq/kg。226Ra 和 232Th 的放射性活度较低,而 40K 的放射性活度则略高于全球平均值 32、45 和 412 Bq/kg。放射性核素的放射性活度多年来没有显示任何上升趋势,这表明该地区的采矿活动对周围环境的土壤没有影响。土壤中的镭当量为 117.10 Bqkg-1,低于建议限值 370 Bqkg-1,年有效外部剂量为 345.56 µSvy-1,低于全球平均值 460 µSvy-1。外部危害指数为 0.35 Bq kg-1,表明土壤中天然放射性核素的辐射危害很小。
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引用次数: 0
Feasibility Study of Radio Xenon Measurement in Environment Using Computational Techniques 利用计算技术测量环境中放射性氙的可行性研究
IF 1 4区 工程技术 Q4 INSTRUMENTS & INSTRUMENTATION Pub Date : 2024-01-02 DOI: 10.1007/s12647-023-00707-0
Amit K. Verma, Amar D. Pant, Anilkumar S. Pillai, A. Vinod Kumar

Xenon (Xe) is a noble gas and therefore chemically inert in the environment. The Earth’s atmosphere contains approximately 0.087 ppm of stable xenon. Radio xenon isotopes like 133Xe and 135Xe are artificial isotopes generated from various nuclear facilities. Atmospheric measurement of radioactive xenon isotopes (radio xenon) plays a key role in remote monitoring of any nuclear accidents, abnormal release from nuclear facilities or nuclear explosions, since radio xenon has a high capability to migrate in a wide range from the site. The measurement of these gamma-emitting radioxenon gas can be done by sampling the gas in measurement geometry (like gas cell) and counting the cell in suitable gamma spectrometry-based detector system. For measurement of radioactive content in the sample, the efficiency calibration of system has to be carried out with same measurement geometry and same gamma ray energy that of sample. Many times, the radioactive standard sources in same measurement geometries and for same gamma energies are not feasible. In such cases, experimentally validated computational techniques are used for generating efficiency function. This paper describes the application of computational technique for measurement of radio xenon (133Xe and 135Xe) gas in the environment.

摘要 氙(Xe)是一种惰性气体,因此在环境中具有化学惰性。地球大气中大约含有 0.087 ppm 的稳定氙。133Xe 和 135Xe 等放射性氙同位素是从各种核设施中产生的人造同位素。大气中放射性氙同位素(放射性氙)的测量在任何核事故、核设施异常释放或核爆炸的远程监测中发挥着关键作用,因为放射性氙具有很强的从现场大范围迁移的能力。测量这些伽马射线放射性氙气的方法是在测量几何形状(如气室)中对气体进行采样,然后在适当的伽马能谱探测系统中对气室进行计数。要测量样品中的放射性含量,必须用与样品相同的测量几何形状和相同的伽马射线能量对系统进行有效校准。很多时候,在相同的测量几何形状和相同的伽马射线能量下使用放射性标准源是不可行的。在这种情况下,就需要使用经过实验验证的计算技术来生成效率函数。本文介绍了计算技术在环境中放射性氙(133Xe 和 135Xe)气体测量中的应用。
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引用次数: 0
Investigating Radon Concentration in Groundwater and Seawater in the Eastern Coast of India 调查印度东海岸地下水和海水中的氡浓度
IF 1 4区 工程技术 Q4 INSTRUMENTS & INSTRUMENTATION Pub Date : 2024-01-02 DOI: 10.1007/s12647-023-00725-y
Abinash Sahu, P. Prusty, Prativa Sahu, S. K. Jha

The eastern coast of India, particularly near the Rushikulya River Bay, has several industries, port and urban settlements, which makes it important to study the dissolved radon concentration in the groundwater as well as in the seawater of this area. In the present study, 20 samples (9 groundwater and 11 seawater samples) were analysed using the AlphaGUARD radon monitor for the naturally occurring 222Rn. The study reveals that radon concentration in the groundwater is higher, which varies between 631 and 3142 Bq m−3 in comparison with the radon concentration in coastal waters that have a range between 160 and 289 Bq m−3. The difference in the concentration of radon in the shallow groundwater and the seawater shows that proper accounting for radon in the system will lead to quantification of the submarine groundwater discharge in this coastal region.

印度东海岸,特别是靠近鲁什库利亚河湾的地方,有许多工业、港口和城市定居点,因此研究该地区地下水和海水中的溶解氡浓度非常重要。本研究使用 AlphaGUARD 氡监测仪对 20 个样本(9 个地下水样本和 11 个海水样本)进行了天然 222Rn 分析。研究显示,地下水的氡浓度较高,介于 631 和 3142 Bq m-3 之间,而沿海水域的氡浓度介于 160 和 289 Bq m-3 之间。浅层地下水和海水中氡浓度的差异表明,对系统中的氡进行适当的核算将有助于对该沿海地区的海底地下水排放进行量化。
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