AZEVEDO, C.D.R.; BAEZA, A.; CHAUVEAU, E.; CORBACHO, J.A.; DÍAZ, J.; DOMANGE, J.; MARQUET, C.; MARTÍNEZ-ROIG, M.; PIQUEMAL, F.; VELOSO, J.F.C.A.; YAHLALI, N.

doi:10.1016/j.nima.2020.164555

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AZEVEDO, C.D.R.

BAEZA, A.

CHAUVEAU, E.
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]

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Nucl.Instrum.Meth.A. 2020, vol. 982, p. 164555

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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 in coincidence 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.< Réduire

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Tritium in water

Real-time monitor

Nuclear power plant

Environmental safety

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Simulation results of a real-time in water tritium monitor

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