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Description
High-activity water (HAW) generated during proton-beam operation represents an important source of residual radiation at high-power accelerator facilities. At the TRIUMF ARIEL proton target station, activated cooling water associated with the beam dump and medical-target components can contribute to radiation fields in the Target Preparation and Service Room (TPSR) and adjacent accessible areas. This work presents a FLUKA-based assessment of the residual dose rates arising from activated water and investigates shielding configurations to maintain acceptable radiation levels in the neighbouring Hot Cell Ante Room. The activation and subsequent transport of radiation from the HAW package were simulated using a detailed model of the ARIEL target station and surrounding areas. A conservative short cooling time was considered to assess the radiation field shortly after beam operation. Different shielding concepts for the TPSR entrance were investigated, including a concrete maze and a shielded-door configuration. The calculations indicate that radiation streaming through the entrance can lead to elevated dose rates in the adjacent area when using the concrete-maze configuration, whereas the introduction of additional shielding substantially reduces the radiation field outside the TPSR.
| Topics | T4. Shielding and dosimetry |
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