From International Equivalence to National Traceability in Radionuclde Metrology

The methods for absolute (direct) standardization, coincidence method for radionuclides emitting several simultaneous radiations and liquid scintillation counting for radionuclides emitting a single radiation, the obtained results, as the technical basis for a primary radioactivity standard recognition, are shortly reviewed. They were published in many scientific papers. The key and supplementary comparisons organized by the CIPM-CCRI(II), EUROMET, other supplementary IAEA comparisons, former COMECOM, as well as bilateral comparisons results, served as basis for the recognition of the international equivalence of the Romanian radioactivity standards. In order to assure the national traceability, our laboratory prepared and delivered radioactive standards, standardized radioactive sources, calibrated and checked radioactivity measurement equipment and organized national comparisons. The laboratory, attested by the BRML and notified by the CNCAN, is also on way to be accredited by the RENAR, as a calibration and testing laboratory, according to the RS EN ISO/IEC 17025:2005 standard requirements. Its QS was recognized by the Q-TC EUROMET