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开发用于能力测试的金属放射性液体参考材料

S H Lee¹, Y Jung¹, M J Lee¹

¹Environmental Radioactivity Safety Team, Korea Research Institute of Standards and Science (KRISS), 267 Gajeong-ro, Yuseong-gu, Daejeon, 34113, Republic of Korea.

Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine

|August 4, 2023

概括

这项研究创造了用于核废物辐射测量质量保证的金属放射性液体参考材料. 熟练测试显示,对某些同位素有很好的一致性,但对其他同位素有差异,这凸显了对认证参考材料的需求.

科学领域:

核化学核化学核化学
放射化学放射化学是指辐射化学.
环境科学环境科学

背景情况:

核电厂产生金属废物,需要精确的辐射测量以确保安全运行和退役.
现有的参考材料可能不能充分代表金属放射性废物的复杂矩阵.
放射性废物管理的质量保证对于监管合规和环境保护至关重要.

研究的目的:

开发和验证金属放射性废物的液体参考材料.
评估实验室在金属废物中测量关键放射性核酸的表现.
为未来的认证参考材料 (CRM) 开发奠定基础.

主要方法:

通过溶解不钢组件 (Fe,Ni,Cr,Mn) 并结合标准放射性源 (Cs-134,Cs-137,Co-60,Sr-90) 来制备液态参考材料.
玛和β发射器的理论和测量质量活动的比较.
三个实验室使用开发的参考材料进行了熟练测试,通过Z-score评估结果.

主要成果:

观察到玛和β发射器的理论值和测量值之间在1西格马的置信区间内有很好的一致性.
熟练测试显示了对Cs-137和Co-60的良好协议,但参与实验室对Cs-134的低估和对Sr-90的高估.
确定了需要在放射性金属废物分析中提高测量精度的特定放射性核素.

结论:

开发的金属放射性液体参考材料适用于金属废物的辐射测量质量保证.
该研究确定了针对特定放射性核素的实验室性能改善的领域.
这些材料显示出未来注册为放射性金属废弃物分析的认证参考材料 (CRM) 的希望.

关键词:

(134) 在Csss中.(137) Csss 的使用情况.(60) 的CoCoCoCo.(90) 斯里兰卡人金属废弃物废弃的金属废弃物能力测试能力测试能力测试能力测试参考材料参考材料是指参考材料.

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