Rimlinger Maeva, Frosio Thomas, Menaa Nabil, Magistris Matteo, Theis Chris
Radiation Protection Group, European Organization for Nuclear Research, 1211 Geneva 23, Switzerland.
Radiation Protection Group, European Organization for Nuclear Research, 1211 Geneva 23, Switzerland.
Appl Radiat Isot. 2020 Dec;166:109419. doi: 10.1016/j.apradiso.2020.109419. Epub 2020 Sep 12.
In the framework of maintenance activities in particle accelerators, such as upgrades and dismantling, a large number of activated equipment are removed from the accelerator complex and require characterization in view of their disposal as radioactive waste. In particular, cables can be of different types. This feature induces variations of the efficiency calibration curves due to the variation of the material composition, source distribution and density. Hence, quantifying the activities of the gamma-emitting radionuclides can be quite challenging for mixed cables. In this article, we propose a new qualification methodology, based on gamma spectrometry, in order to assess the activity results uncertainties of gamma-emitting radionuclides. This new methodology is developed to define the envelop efficiency calibration curves and allows for the establishment of more accurate activity values with their corresponding uncertainties.
在粒子加速器的维护活动框架内，例如升级和拆除，大量活化设备从加速器设施中移除，鉴于其作为放射性废物进行处置，需要对其进行特性描述。特别是，电缆可能有不同类型。由于材料成分、源分布和密度的变化，这一特性会导致效率校准曲线的变化。因此，对于混合电缆而言，量化发射伽马射线的放射性核素的活度可能颇具挑战。在本文中，我们提出了一种基于伽马能谱法的新鉴定方法，以评估发射伽马射线的放射性核素活度结果的不确定性。开发这种新方法是为了定义包络效率校准曲线，并能够确定更准确的活度值及其相应的不确定性。
