The huge amount of naturally occurring radioactive material (NORM) worldwide generated shows a high level of complexity for disposal purposes because of the high variability of radioactivity enrichment, therefore a case-bycase control is required. We developed a fully automated highresolution gamma-ray spectrometer, called MCA_Rad system [1], which offers a suitable measurement technique for monitoring huge amounts of NORM. Two coupled HPGe detectors p-type with 60% relative efficiency are accurately shielded allowing to reach an environmental background reduction of two orders of magnitude. Through fully automation of operational processes up to 24 samples can be measured without any human attendance. The absolute efficiency of the MCA_Rad system is estimated by using two point sources, 152Eu and a 56Co and validated at 5% of relative uncertainty by measuring certified reference materials.
Automated gamma-ray spectrometer for monitoring wastes made by non-nuclear industries.
XHIXHA, Gerti;FIORENTINI, Giovanni;MANTOVANI, Fabio;STRATI, Virginia;
2013
Abstract
The huge amount of naturally occurring radioactive material (NORM) worldwide generated shows a high level of complexity for disposal purposes because of the high variability of radioactivity enrichment, therefore a case-bycase control is required. We developed a fully automated highresolution gamma-ray spectrometer, called MCA_Rad system [1], which offers a suitable measurement technique for monitoring huge amounts of NORM. Two coupled HPGe detectors p-type with 60% relative efficiency are accurately shielded allowing to reach an environmental background reduction of two orders of magnitude. Through fully automation of operational processes up to 24 samples can be measured without any human attendance. The absolute efficiency of the MCA_Rad system is estimated by using two point sources, 152Eu and a 56Co and validated at 5% of relative uncertainty by measuring certified reference materials.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
