Simulation results on a real-time in water tritium monitor

C. D. R. Azevedo; A. Baeza; E. Chauveau; J. A. Corbacho; J. Díaz; J. Domange; C. Marquet; M. Martínez-Roig; F. Piquemal; J. F. C. A. Veloso; N. Yahlali

doi:10.1016/j.nima.2020.164555

arXiv · 2002.06050

Simulation results on a real-time in water tritium monitor

C. D. R. Azevedo·A. Baeza·E. Chauveau·J. A. Corbacho·J. Díaz·J. Domange·C. Marquet·M. Martínez-Roig·F. Piquemal·J. F. C. A. Veloso·N. Yahlali

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Abstract

In this work we present simulation results for a modular tritium in-water real-time monitor. The system allows for scalability in order to achieve the required sensitivity. The modules are composed by 340 uncladed scintillating fibers immersed in water and 2 photosensors for light readout. Light yield and Birks' coefficient uncertainties for low energy beta particles is discussed. A study of the detection efficiency according to the fiber length is presented. Discussion on the system requirements and background mitigation for a device with sensitivity of 100\,Bq/L, required to comply with the European directive 2013/51/Euratom, is presented. Due to the low energetic beta emission from tritium a detection efficiency close to 3.3\% was calculated for a single 2\,mm round fiber.

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C. D. R. Azevedo, A. Baeza, E. Chauveau, J. A. Corbacho, J. Díaz, J. Domange, C. Marquet, M. Martínez-Roig, F. Piquemal, J. F. C. A. Veloso, N. Yahlali. 2020-05-20. Simulation results on a real-time in water tritium monitor. https://doi.org/10.1016/j.nima.2020.164555

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