Spent fuels (SFs) are stored in a storage pool after discharge from nuclear power plants. They can be transferred to for the further processes such as dry storage sites, processing plants, or disposal sites. One of important measures of SF is the burnup. Since the radioactivity of SF is strongly dependent on its burnup, the burnup of SF should be well estimated for the safe management, storage, and final disposal. Published papers about the methodology for the burnup estimation from the known activities of important radioactive sources are somewhat rare. In this study, we analyzed the dependency of the burnup on the important radiation source activities using ORIGEN-ARP, and suggested simple correlations that relate the burnup and the important source activities directly. A burnup estimation equation is suggested for PWR fuels relating burnup with total neutron source intensity (TNSI), initial enrichment, and cooling time. And three burnup estimation equations for major gamma sources, 137Cs, 134Cs, and 154Eu are also suggested.

본 연구에서는 BEMT(Blade Element Momentum Theory)에 의해 우선 정격 출력 100 kW인 수평축 조류 발전용 단일 터빈에 대한 기본 형상 설계를 진행하고, CFD 해석을 통해 블레이드 주변 유동특성 파악 및 출력 성능 예측을 하였다. 기본적인 에어포일은 FFA-W3-301, DU-93-W210, NACA-63418을 사용하였다. 이를 바탕으로 상반회전 터빈의 특성을 고찰한 결과, 설계 주속비 5.17에서 최대 출력계수는 0.495이며, 터빈의 출력은 101.82 kW를 얻었다.