PT Journal
AU Azevedo, CDR
   Baeza, A
   Chauveau, E
   Corbacho, JA
   Diaz, J
   Domange, J
   Marquet, C
   Martinez-Roig, M
   Piquemal, F
   Veloso, JFCA
   Yahlali, N
TI Simulation results of a real-time in water tritium monitor
SO Nuclear Instruments & Methods in Physics Research A
JI Nucl. Instrum. Methods Phys. Res. A
PY 2020
BP 164555
EP 7pp
VL 982
DI 10.1016/j.nima.2020.164555
LA English
DE Tritium in water; Real-time monitor; Nuclear power plant; Environmental safety
AB 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.
ER