The Advanced Rare IsotopE Laboratory (ARIEL) facility, dedicated to Radioactive Ion Beam (RIB) production via the Isotope Separation On-Line (ISOL) technique, is currently under construction at TRIUMF. The facility is to host dual target stations that will operate simultaneously, including a 500 MeV proton beam from the main TRIUMF cyclotron and a 50 MeV electron beam from an Electron Linear Accelerator (e-linac). The proton target station will operate a symbiotic medical target in series with the ISOL target.

The ARIEL facility features a compact shielding envelope and as a result its optimization relied extensively on simulations generated using the Monte Carlo particle transport and interaction code FLUKA. Dose rate maps were produced of prompt radiation associated with beam losses and expected normal operations. Maps of transient fields were also generated considering radiation sources requiring transport within the facility which include radioactive waste generated in the course of normal operations. Activation studies were also conducted to estimate the amount of residual radioactivity contained in shielding materials at the time of decommissioning. Simulation results are primarily used to inform the ongoing design and construction of ARIEL; at present, the entirety of the proposed facility shielding has been validated by FLUKA simulation data. The specification of shielding geometry and the selection of materials relied extensively on engineering support through verification of CAD models and material sampling to optimize solutions for design simplicity and economy. Normal operation and failure scenarios were both evaluated, with optimized shielding materials and thicknesses selected considering the nature of the radiation fields present and their impact on room occupancy. Finally, a decommissioning plan has been defined based on the anticipated ARIEL lifetime, the characterization of structural activation, and a general disposal strategy.

While ARIEL is still under construction and significant progress has been made, the ongoing radiation modelling has enabled validation of the current shielding design for nominal operation. Moreover, the systematic studies performed were paramount in defining the optimal strategies to adopt from target storage to that for decommissioning of the facility.

目前，TRIUMF正在建设先进的稀有同位素实验室（ARIEL），该实验室致力于通过同位素分离在线（ISOL）技术生产放射性离子束（RIB）。该设施将容纳将同时运行的双目标站，其中包括来自TRIUMF回旋加速器的500 MeV质子束和来自电子直线加速器（e-linac）的50 MeV电子束。质子目标站将操作与ISOL目标串联的共生医学目标。

ARIEL设施具有紧凑的屏蔽外壳，因此其优化过程广泛依赖于使用蒙特卡洛粒子传输和相互作用代码FLUKA生成的模拟。剂量率图是由与射线束损失和预期的正常运行相关的即时辐射产生的。还考虑了需要在设施内运输的辐射源（包括在正常运行过程中产生的放射性废物）生成了瞬变场图。还进行了活化研究以估计残留量退役时屏蔽材料中包含的放射性。仿真结果主要用于告知ARIEL正在进行的设计和建造；目前，拟议的设施防护设施已通过FLUKA仿真数据进行了验证。屏蔽几何形状的规范和材料的选择在很大程度上依赖于工程支持，通过验证CAD模型和材料采样来优化解决方案，以简化设计并节省成本。评估了正常运行和故障情况，并根据存在的辐射场的性质及其对房间占用的影响，选择了优化的屏蔽材料和厚度来进行评估。最后，根据预期的ARIEL寿命，结构激活的特征，

尽管ARIEL仍在建设中，并且已经取得了重大进展，但正在进行的辐射建模已能够验证用于名义运行的当前屏蔽设计。此外，进行系统的研究对于确定从目标存储到设施退役的最佳策略至关重要。