A new low-level tritiated water measurement system using CaF₂(Eu) powders

Abstract

With the development of ITER and CFETR, the measurement of tritium in low-level tritiated water is indispensable from the viewpoint of assessment and safety of tritium. To reduce radioactive waste produced by liquid scintillation counting, we have built a new low-level tritiated water measurement system using CaF 2 (Eu) powders. When an 8 mm thickness sample chamber and M sample (average grain sizes: 59.1 µm) were used, our measurement system responded accurately to tritium concentrations down to approximately 2.6 Bq/mL for 10 min measurements, and the calculated detection limit was about 4.6 Bq/mL. When a 3 mm thickness sample chamber and S sample (average grain sizes: 8.4 µm) were used, our measurement system responded accurately to tritium concentrations down to approximately 1.2 Bq/mL for 10 min measurements, and the calculated detection limit was about 0.64 Bq/mL.

Radioactive waste: A review

“…Wu, Chen, Wang, Li, and Lai (2019) established a low‐level tritiated water measurement system using CaF 2 (Eu) powders to reduce the amount of radioactive waste. The authors investigated the performance of this measurement system using two types of CaF 2 (Eu) powders, M sample and S sample.…”