Abstract
The instrument, equipment, and computer software of the gamma-radioactivity nondestructive measurement system for complex radiation field are introduced. The high-purity germanium (HPGe) detector calibration methods for the gamma energy, full width at half maximum (FWHM), and absolute efficiency are mainly illustrated, as well as the calculation methods for gamma-flux transfer function and nuclide radioactivity. The system is used to measure the gamma spectra of the four-type radiation waste drums in the QT building of Daya Bay Nuclear Power Plant. The nuclide radioactivity inside the drums is calculated by using the absolute efficiency calibration method (adopted by this system) and “the efficiency calibration method dispensing with standard sources,” respectively. The results indicate that the calculation precision of the above-mentioned two methods is equivalent. The suitable optimized measurement condition is obtained by analyzing the influences of various measurement conditions (such as the distance, height, and orientation) on the radioactivity measurement results.
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Acknowledgments
Thanks for the helps given by Yang Junwu, Yang Jian and Ye Yongdong who are the engineers of Daya Bay Nuclear Power Plant in the detector calibration and the preparation of measurement conditions. Thanks for the helps given by Zhou Xi and Weng Fangjian (my colleagues) in the in situ gamma-spectrum measurement of waste barrels.
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Gao, Y. (2017). Development and Application of Gamma-Radioactivity Nondestructive Measurement System for Complex Radiation Field. In: Jiang, H. (eds) Proceedings of The 20th Pacific Basin Nuclear Conference. PBNC 2016. Springer, Singapore. https://doi.org/10.1007/978-981-10-2314-9_40
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DOI: https://doi.org/10.1007/978-981-10-2314-9_40
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