The metal product from the electrolytic reduction of uranium oxide in LiCl molten salt retains about 10 ~ 20wt% of the residual salts. Salt vacuum distillation is conducted to separate the residual salt from the metal product and well-performed in a glove box in an argon atmosphere. A dimensionless analysis of the characteristics of a salt vacuum distiller needs to be scaled up for a high capacity process. The vacuum distillation apparatus can be of two different sizes (M-type and P-type). M-type equipment is small in size and exhibits a high recovery rate of more than 95%. A comparison of two salt vacuum distillers was conducted with the dimensionless analysis method. Heat and fluid flows are strongly influenced by the structure of the apparatus and phase transition phenomena of vacuum distillation. The several dimensionless parameters were calculated at the nozzle throat located between the evaporator and the receiver and at different operating temperatures. Both salt vacuum distillers had similar trends of dimensionless parameters. However, the distributions of the parameter values varied with the nozzle geometry and size. The results of the dimensionless analysis will aid the scaling up of the salt distillation process.
목차
Abstract 1. Introduction 2. Strategy 3. Procedure 3.1 Determination of the Standard Model 3.2 Heat-Transfer Balance in theM-type Standard Model Based on Phase Transition 3.3 Analysis of Heat and Fluid Flows in the M-type Standard Model 3.4 Comparison of M-type and P-type Cathode Processing Apparatuses 4. Results and Discussion 4.1 Velocity Distribution in the Nozzle Throat 4.2 Evaluation of Dimensionless Parameters for M-type and P-Type Apparatuses 4.3 Temperature and Vapor Flow Distributions of P-type apparatus 5. Conclusions REFERENCES
키워드
Salt distillationPyroprocessingDimensionless analysisScale-up
저자
HunSuk Im [ 임현숙 | Korea Atomic Energy Research Institute ]
Corresponding author.
Seung Chul Oh [ 오승철 | Korea Atomic Energy Research Institute ]
Sun-Seok Hong [ 홍순석 | Korea Atomic Energy Research Institute ]
Eun-Young Choi [ 최은영 | Korea Atomic Energy Research Institute ]
Jin-Mok Hur [ 허진목 | Korea Atomic Energy Research Institute ]
한국방사성폐기물학회는 국내 방사성폐기물 관리 분야 산ㆍ학ㆍ연 관계자들의 학술단체로 학술연구발표회 및 강연회 개최, 학술간행물 발간 등의 학술 진흥사업, 방사성폐기물에 관한 국제교류 및 협력 증진사업, 방사성폐기물에 관한 위탁연구 자문 및 평가사업 수행 등으로 국내 방사성폐기물 관리 분야 전반의 내부 역량 강화와 경쟁력 확보를 도모하고자 한다. 더 나아가 국가사회 발전에 미치는 중요성을 인식하는 계기를 만들고자 한다. 또한 이러한 활동을 통하여 국가경제 발전과 국민건강에 일조할 수 있도록 하며, 궁극적으로는 한국방사성폐기물학회가 세계 속의 학술단체로의 발전해 나가는 것을 목표로 한다.
간행물
간행물명
방사성폐기물학회지 [Journal of Nuclear Fuel Cycle and Waste Technology (JNFCWT)]