Abstract
Plutonium (Pu) contents in spent nuclear fuels, recovered uranium (U) or uranium/transuranium (U/TRU) products must be measured in order to secure the safeguardability of a pyroprocessing facility. Self-induced X-Ray fluorescence (XRF) and gamma-ray spectroscopy are useful techniques for determining Pu-to-U ratios and Pu isotope ratios of spent fuel. Photon measurements of spent nuclear fuel by using high-resolution spectrometers such as high-purity germanium (HPGe) detectors show a large continuum background in the low-energy region, which is due in large part to Compton scattering of energetic gamma rays. This paper proposes a Compton suppression system for reducing of the Compton continuum background. In the present study, the system was configured by using an HPGe main detector and a BGO (bismuth germanate: Bi4Ge3O12) guard detector. The system performances for gamma-ray measurement and XRF were evaluated by means of Monte Carlo simulations and measurements of the radiation source. The Monte Carlo N-Particle eXtended (MCNPX) simulations were performed using the same geometry as for the experiments, and considered, for exact results, the production of secondary electrons and photons. As a performance test of the Compton suppression system, the peak-to-Compton ratio, which is a figure of merit to evaluate the gamma-ray detection, was enhanced by a factor of three or more when the Compton suppression system was used.
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References
W. S. Charlton, D. Strohmeyer, A. Stafford, S. Saavedra and A. S. Hoover, European Safeguards R&D Association (2009).
D. Reilly, N. Ensslin, H. Smith ffixJr. and S. Kreiner, NUREG/CR-5550, 413 (1991).
A. V. Bushuev, V. I. Galkov, A.V. Zbonarev, A. F. Zolotov, A. A. Kutuzov, N. A. Mel’nicheko, V. N. Ozerkov and V. V. Chachin, Atom Energy+. 53, 5 (1982).
S. K. Lee, H. Seo, S. H. Park, H. S. Shin, H. D. Kim and Y. K. Kim (Korea Physics Society Spring Conference, Daejeon, Korea, April, 2013).
G. F. Knoll, Radiation Detection and Measurements, third edition (John Wiley & Sons Inc, New York, 1999).
www.crystals.saint-gobain.com.
www.ortec-online.com.
H. J. M. Aarts, C. J. Van Der Poel, D. E. C. Scherpenzeel, H. F. R. Arciszewski and G. A. P. Engelbertink, Nucl. Instrum. Meth. 177, 417 (1980).
N. Ghal-Eh, H. Doostizadeh, Z. Hazami and V. Doust-Mohammadi, Radiat. Phys. Chem. 112, 34 (2015).
M. Moszynski, J. H. Bjerregard, J. J. Gaardhoje, B. Herskind, P. Knudsen and G. Sletten, Nucl Instrum. Meth. A 280, 73 (1989).
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Lee, S.K., Seo, H., Won, BH. et al. Measurement and simulation of a Compton suppression system for safeguards application. Journal of the Korean Physical Society 67, 1738–1743 (2015). https://doi.org/10.3938/jkps.67.1738
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DOI: https://doi.org/10.3938/jkps.67.1738