Effects of Organic Solvent on Infinite Neutron Multiplication Factor of Homogeneous Plutonium Nitrate Solution System
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概要
- 論文の詳細を見る
The validity of replacing organic solvent with water in making models for criticality safety evaluation analysis of fuel solution systems was examined by the calculation of the infinite neutron multiplication factor (k<SUB>inf</SUB>) for the homogeneous plutonium(IV) nitrate in aqueous and organic solvent solutions. The atomic number densities of fuel solutions were determined by the density formula based on measurements. It was confirmed that kinf of plutonium(IV) nitrate-30vol% tributylphosphate (TBP)-dodecane organic solventsystem is nearly equal to that of plutonium nitrate-aqueous solution system in general. However, more strictly, the values of k<SUB>inf</SUB> of organic solvent system became slightly larger than the corresponding values of aqueous solution in the Pu concentration ranged up to 70g/l, which gives the opposite result to Webers for plutonium nitrate-30vol% TBP-kerosene organic system. Consequently, the estimated lower limit critical concentration for <SUP>239</SUP>Pu(NO<SUB>3</SUB>)<SUB>4</SUB> organic solvent system was found 1% smaller than the corresponding value for aqueous solution system. It was also found that k<SUB>inf</SUB> tends to increase by increasing the concentration of TBP in organic solvent.
- 社団法人 日本原子力学会の論文
- 1998-05-25
著者
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OKUNO Hiroshi
Japan Atomic Energy Agency
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Arakawa Takuya
Japan Atomic Energy Research Institute
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SAKURAI Satoshi
Japan Atomic Energy Research Institute
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Okuno Hiroshi
Japan Atomic Energy Research Institute
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