The transformation and flow of atoms in the fifth unstable nuclide series and the transformation ratio of fuel consumption to fission production

ZHANG Jiahua

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The transformation and flow of atoms in the fifth unstable nuclide series and the transformation ratio of fuel consumption to fission production

更新时间：2021-04-09

- The transformation and flow of atoms in the fifth unstable nuclide series and the transformation ratio of fuel consumption to fission production
- NUCLEAR TECHNIQUES Issue 12, (1998)
- 作者机构：
  
  1. 中国科学院上海原子核研究所,上海
  2. ,201800
- 作者简介：
- 基金信息：
- DOI：
  CLC： TL3
- Published：01 December 1998
- 稿件说明：
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[1]张家骅.第五不稳定核素系中的原子流动情况及核燃料的耗-裂转化比[J].核技术,1998(12):705-708.

ZHANG Jiahua. The transformation and flow of atoms in the fifth unstable nuclide series and the transformation ratio of fuel consumption to fission production[J]. Nuclear techniques, 1998, (12): 705-708.
[1]张家骅.第五不稳定核素系中的原子流动情况及核燃料的耗-裂转化比[J].核技术,1998(12):705-708. DOI：

ZHANG Jiahua. The transformation and flow of atoms in the fifth unstable nuclide series and the transformation ratio of fuel consumption to fission production[J]. Nuclear techniques, 1998, (12): 705-708. DOI：

摘要

采用原子流动的表达方式以描述238U在核动力堆中受到中子通量作用而耗损转化为一代接着一代衍生核素的原子流动情况，并由此得出在恒定的中子通量作用下，238U的耗损量转化为裂变物的关系式即核燃料（二级）的耗－裂转化比，它的数值随着238U所受的积分中子通量的增大而增大，其最高值只略低于1。此时，238U及其整个系统的各代衍生核素构成了一个完整的不稳定核素系，即第五不稳定核素系。在这之前，系统则处于第五不稳定核素系的发育阶段。

Abstract

Using a method based on the concept of "now of atoms" in the nuclear fuel 238U to describe its generation of derived nuclide under neutron flux’s reaction and the transformation of derived nuclide from generation to generation as well as fission prodtiction accompanied with each derived nuclide

expression of the instantaneous transformation for the fuel consumption and the total fission production is obtained.At the beginning stage

this ratio grows up from zero and increases gradually with reactor operating time corresponding to fifth unstable nuclide series constituted by 238U and its derived nuclide group being in the developing stage. As soon as the fifth unstable nuclide series reaches its equilibrium stage

the transforination ratio approaches its final value very close to unity.

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Discussion on effective utilization of nuclear fuel based on peculiar property of the Fifth Unstable Nuclide Series

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ZHANG Jiahua

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Shanghai institute of Nuclear Research, the Chinese Academy Sciences

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