Experimental evaluation of fuel rod pattern analysis in fuel assembly using Yonsei single-photon emission computed tomography (YSECT)

다국어 초록 (Multilingual Abstract)

The purpose of this study was to verify the possibility of fuel rod pattern analysis in a fresh fuel assemblyusing the Yonsei single-photon emission computed tomography (YSECT) system. The YSECT systemconsisted of three main parts: four trapezoidal-shaped bismuth germanate scintillator-based 64-channeldetectors, a semiconductor-based multi-channel data acquisition system, and a rotary stage. In order toassess the performance of the prototype YSECT, tomographic images were obtained for three representative fuel rod patterns in the 6 6 array using two representative image-reconstruction algorithms.
The fuel-rod patterns were then assessed using an in-house fuel rod pattern analysis algorithm. In theexperimental results, the single-directional projection images for those three fuel-rod patterns welldiscriminated each fuel-rod location, showing a Gaussian-peak-shaped projection for a single 10 mmdiameter fuel rod with 12.1 mm full-width at half maximum. Finally, we successfully verified the possibility of the fuel rod pattern analysis for all three patterns of fresh fuel rods with the tomographicimages obtained by the rotational YSECT system

참고문헌 (Reference)

1 F. L evai, "Use of High Energy Gamma Emission Tomography for Partial Defect Verification of Spent Fuel Assemblies" IAEA 1993

2 J.D. Chen, "Partial Defect Detection in LWR Spent Fuel Using a Digital Cerenkov Viewing Device" 12-16, 2009

3 T. W. Laub, "Optimization of the Spent Fuel Attribute Tester Using Radiation Transport Calculations" Sandia National Labs 1993

4 H.J. Choi, "Optimization of single-photon emission computed tomography system for fast verification of spent fuel assembly: a Monte Carlo study" 14 (14): T07002-, 2019

5 M. Seal, "IAEA Safeguards Techniques, Equipment, 2003 Edition, International Nuclear Verification Series No. 1"

6 E.A. Miller, "Hybrid Gamma Emission Tomography (HGET): FY16Annual Report" PNNL 20-27, 2017

7 M. Mayorov, "Gamma emission tomography for the inspection of spent nuclear fuel" IEEE 1-2, 2017

8 R. Bugalho, "Experimental results with TOFPET2 ASIC for time-of-flight applications" 912 : 195-198, 2018

9 M. Kuribara, "Development of new UV-II Cerenkov viewing device" 41 (41): 331-335, 1994

10 T. Merlin, "CASToR : a generic data organization and processing code framework for multi-modal and multi-dimensional tomographic reconstruction" 63 : 185005-, 2018

11 E. Brayfindley, "Automated defect detection in spent nuclear fuel using combined Cerenkov radiation and gamma emission tomography data" 204 (204): 343-353, 2018

12 S. Vaccaro, "Advancing the Fork detector for quantitative spent nuclear fuel verification" 888 : 202-217, 2018

13 이상훈 ; 문주현, "AN ASSESSMENT OF THE RADIATION DOSE RATE DUE TO AN OCCURRENCE OF THE DEFECT ON THE SPENT NUCLEAR FUEL ROD" 대한방사선방어학회 34 (34): 144-150, 2009

14 E.L. Smith, "A viability study of gamma emission tomography for spent fuel verification: JNT 1955 phase I technical report 12-13" PNNL 27-, 2016

15 T. Honkamaa, "A Prototype for passive gamma emission tomography" 2014