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자료유형
학술저널
저자정보
저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제45권 제7호
발행연도
2013.1
수록면
921 - 928 (8page)

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초록· 키워드

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A future nuclear energy system is being developed at Korea Atomic Energy Research Institute (KAERI), the systeminvolves a Sodium Fast Reactor (SFR) linked with the pyro-process. The pyro-process produces a source material to fabricatea SFR fuel rod. Therefore, an isotopic fissile content assay is very important for fuel rod safety and SFR economics. A newtechnology for an analysis of isotopic fissile content has been proposed using a lead slowing down spectrometer (LSDS). Thenew technology has several features for a fissile analysis from spent fuel: direct isotopic fissile assay, no backgroundinterference, and no requirement from burnup history information. Several calculations were done on the designedspectrometer geometry: detection sensitivity, neutron energy spectrum analysis, neutron fission characteristics, self shieldinganalysis, and neutron production mechanism. The spectrum was well organized even at low neutron energy and the thresholdfission chamber was a proper choice to get prompt fast fission neutrons. The characteristic fission signature was obtained inslowing down neutron energy from each fissile isotope. Another application of LSDS is for an optimum design of the spentfuel storage, maximization of the burnup credit and provision of the burnup code correction factor. Additionally, an isotopicfissile content assay will contribute to an increase in transparency and credibility for the utilization of spent fuel nuclearmaterial, as internationally demanded.

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