对α,β表面污染监测器校准结果的比较
Liviu-Cristian Mihailescu1, Denis Glavič-Cindro2, Jussi Huikari3
1Belgian Nuclear Research Centre SCK CEN, Institute for Nuclear Medical Applications, Boeretang 200, B-2400 Mol, Belgium.
Radiation protection dosimetry
|December 10, 2024
概括
表面污染监测器的校准显示了实验室之间的显著差异. 差异可能是由于校准程序而不是来源,这表明效率测量中的不确定性被低估了.
科学领域:
- 计量学 计量学 计量学
- 辐射检测和测量 辐射检测和测量
- 核安全问题 核安全问题
背景情况:
- 表面污染监测器对于核设施的清除测量,清除污染和退役至关重要.
- 这些监控器的可靠使用需要有效的校准,可追溯到国际标准.
研究的目的:
- 为了在多个剂量测量校准实验室中比较表面污染监测器在2π度的校准效率.
- 识别校准结果差异的潜在原因,并评估当前程序的可靠性.
主要方法:
- 一项涉及五个欧洲国家计量研究所协会 (EURAMET) 成员实验室的比较实验.
- 使用五个放射性核化物源 (Sr-90,Cl-36,Cs-137,Co-60,Am-241) 校准两个转移表面污染监测器.
- 参与者之间分发了监视器,并在试点实验室进行稳定性检查.
主要成果:
- 在所有源和两个探测器中,参与者之间观察到测量2π日效率的显著分歧.
- 这些差异仍然存在,尽管实验室使用了类似的来源,并且可以追溯到主要标准.
- 观察到的差异主要归因于校准程序的变化,这表明测量不确定性被低估了.
结论:
- 试点比较突出显示,在各计量机构的表面污染监测器校准程序中存在不一致.
- 显然需要进行通用的练习来协调校准方法并提高效率测量的准确性.
- 在目前的校准程序中发现的漏洞需要解决,以确保核应用的可靠监控.
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