Performance of portable TDCR systems developed at LNE-LNHB

The triple to double coincidence ratio (TDCR) liquid scintillation measurement technique is commonly used in national metrology institutes (NMIs) perform standardization of pure beta emitters. LNE-LNHB historical device, RCTD1, a quite large which has been developed and over the past 30 years with its associated electronics for measurements various radionuclides. During last 4 two new portable TDCR devices. Such instrumentation gives end-users access reference method that can be number It addresses wide range industrial medical applications radionuclide metrology, including calibrations solutions containing short-lived radionuclides, avoidance radioactive source transportation, performing on-site comparison promote harmonization. In this paper, we will present newly systems. Two kinds devices have designed at built using fused deposition modelling (FDM) 3D printing: mini-TDCR (25 cm diameter, 10 height) micro-TDCR (16 height). After detailed discussion design possibilities offered by printing their conception, paper performance obtained several results compared RCTD1 order validate They exhibit improved performance, such as higher detection efficiency, include useful tools proper metrology. first tests, were performed Orsay Hospital (CEA/SHFJ) another laboratory (IRSN), allowed us show very good overall systems outstanding linearity, was tested from 430 000 s ?1 down 160 coincidences channel. Applications high low activity are also discussed. Finally, device half-life check impurities radio-pharmaceutical solution.