Evaluation result of radionuclide γ-spectrometry in 2016 / 中华放射医学与防护杂志

ABSTRACT

Objective To evaluate the radionuclide measurability and analyzability of the γ-spectrometry laboratories in radiological technology institutions countrywide,ensure the quality of radionuclide γ-spectrometry and outlook the evaluation work in γ-spectrometry.Methods The 2016 annual evaluation of radionuclide γ-spectrometry was carried,and the accuracy and precision of 232Th,40K and 137Cs,activity concentration in soil samples were summarized and analyzed in γ-spectrometry laboratories of radiological technology institutions countrywide.Results Of received 45 revaluation receipts,43 were effective and the other two were ineffective due to the suspension of the evaluation.The relative deviation of the activity concentration values of 232Th,40K and 137Cs given by most of the institutions were within the range of ± 20％,only with two measurements beyond 20％.The evaluation results from the 43 participants were qualified with the overall qualified rate of 100％,of which five were excellent accounting for 11.6％ of all.Conclusions All of the elevation results submitted were accurate,showing better measurability.However,some submittals deviated from the references to some degree.Henceforth,it is necessary to strengthen experimental operation and data processing according to the defend procedures and improve the accuracy and precision of measurement results.