http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Development of a Neutron Measurement System in Unified Non-Destructive Assay for the PRIDE Facility
서희,박세환,원병희,안성규,신희성,나상호,송대용,김호동,이승규 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.11
The Korea Atomic Energy Research Institute (KAERI) has made an effort to develop pyroprocessing technology to resolve an on-going problem in Korea, i.e., the management of spent nuclear fuels. To this end, a test-bed facility for pyroprocessing, called PRIDE (PyRoprocessing Integrated inactive DEmonstration facility), is being constructed at KAERI. The main objective of PRIDE is to evaluate the performance of the unit processes, remote operation, maintenance, and proliferation resistance. In addition, integrating all unit processes into a one-step process is also one of the main goals. PRIDE can also provide a good opportunity to test safeguards instrumentations for a pyroprocessing facility such as nuclear material accounting devices, surveillance systems, radiation monitoring systems, and process monitoring systems. In the present study, a non-destructive assay (NDA) system for the testing of nuclear material accountancy of PRIDE was designed by integrating three different NDA techniques, i.e., neutron, gamma-ray, and mass measurements. The developed neutron detection module consists of 56 3He tubes and 16 AMPTEK A111 signal processing circuits. The amplifiers were matched in terms of the gain and showed good uniformity after a gain-matching procedure (%RSD=0.37%). The axial and the radial efficiency distributions within the cavity were then measured using a 252Cf neutron source and were compared with the MCNPX calculation results. The measured efficiency distributions showed excellent agreement with the calculations, which confirmed the accuracy of the MCNPX model of the system. The Korea Atomic Energy Research Institute (KAERI) has made an effort to develop pyroprocessingtechnology to resolve an on-going problem in Korea, i.e., the management of spent nuclearfuels. To this end, a test-bed facility for pyroprocessing, called PRIDE (PyRoprocessing Integratedinactive DEmonstration facility), is being constructed at KAERI. The main objective of PRIDE isto evaluate the performance of the unit processes, remote operation, maintenance, and proliferationresistance. In addition, integrating all unit processes into a one-step process is also one of themain goals. PRIDE can also provide a good opportunity to test safeguards instrumentations fora pyroprocessing facility such as nuclear material accounting devices, surveillance systems, radiationmonitoring systems, and process monitoring systems. In the present study, a non-destructiveassay (NDA) system for the testing of nuclear material accountancy of PRIDE was designed byintegrating three different NDA techniques, i.e., neutron, gamma-ray, and mass measurements. The developed neutron detection module consists of 56 3He tubes and 16 AMPTEK A111 signalprocessing circuits. The amplifiers were matched in terms of the gain and showed good uniformityafter a gain-matching procedure (%RSD=0.37%). The axial and the radial efficiency distributionswithin the cavity were then measured using a 252Cf neutron source and were compared with theMCNPX calculation results. The measured efficiency distributions showed excellent agreement withthe calculations, which confirmed the accuracy of the MCNPX model of the system.