Determination and Inter-Comparison of 238U and 232Th in Zircon Sand Using Gamma Spectrometry

IF 1 4区 工程技术 Q4 INSTRUMENTS & INSTRUMENTATION MAPAN 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
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Abstract

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.

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利用伽马能谱仪测定和相互比较锆石砂中的 238U 和 232Th
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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来源期刊
MAPAN
MAPAN 工程技术-物理:应用
CiteScore
2.30
自引率
20.00%
发文量
91
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.
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