Resolution of inconsistencies of separative power for asymmetric process. Separative power with respect to desired and undesired materials.:Separative Power with Respect to Desired and Undesired Materials
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概要
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A separative power of a separating process δ<I>U</I> is an increase of a value of an isotopemixture which passes through the process, and is calculated by use of a value function <I>V</I>(<I>R</I>) (<I>R</I>: abundance ratio). The separative power, however, involves various inconsisten-cies especially for an asymmetric process. To remove these inconsistencies, concepts of a "separative power with respect to desired material δ<I>U</I><SUB>b</SUB>" and that δ<I>U</I><SUB>a</SUB> with respect to undesired material are introduced. Two functional forms, having been considered to be the separative power (with respect to mixture) per unit flow rate δ<I>U</I>/(<I>G</I><SUB>a</SUB>+<I>G</I>)<SUB>b</SUB>, corre-spond to separative powers per unit flow of desired and undesired material δUb/Co, δUb/Ga, respectively :<BR>δ<I>U</I><SUB>b</SUB>/<I>G</I><SUB>b</SUB>={α(β-1)In α-(α-1)In β}/(αβ-1)=ψ<SUB>b</SUB>(α, β), <BR>δ<I>U</I><SUB>a</SUB>/<I>G</I><SUB>a</SUB>={β(α-1)In β-(β-1)In α}/(αβ-1)=ψ<SUB>a</SUB>(α, β), <BR>where a and β are heads and tails separation factors. Value functions which give δ<I>U</I><SUB>b</SUB> or δ<I>U</I><SUB>a</SUB> la are independent of separation factors : <I>V</I><SUB>b</SUB>(<I>R</I>) =1n <I>R</I>, <I>V</I><SUB>a</SUB>(<I>R</I>) = -ln <I>R</I>, so inconsisten-cies encountered by δ<I>U</I> never occur. δ<I>U</I><SUB>b</SUB> or δ<I>U</I><SUB>a</SUB> of a single element and of a cascade are obtained by the same functional form, and an additivity of separative power holds both for the desired and undesired material, respectively.<BR>Moreover, the separative power δ<I>U</I> with respect to mixture is interpreted with δ<I>U</I><SUB>b</SUB>, and δ<I>U</I><SUB>a</SUB> to elucidate the origines of inconsistencies.
- 一般社団法人 日本原子力学会の論文
著者
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Kanagawa Akira
Department Of Nuclear Engineering Faculty Of Engineering Nagoya University
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Yamamoto Ichiro
Department Of Chemistry Graduate School Of Science The University Of Tokyo
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