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从燃料元件内生成~(137)Cs、~(134)Cs的核反应过程出发,建立精确的数学物理模型,得到反应堆一回路冷却剂中~(137)Cs、~(134)Cs放射性活度与燃料组件内~(235)U燃耗关系的精确解和简化解。分别给出了简化解、ORIGEN2.0计算结果和精确解的比较。研究表明:只要通过化学测量得到反应堆一回路中~(134)Cs与~(137)Cs的活度比(RCs),即可由本文建立的精确解模型计算得到破损燃料元件的燃耗值,从而达到快速定位破损燃料元件的目的。
Starting from the nuclear reaction process of 137 Cs and 134 Cs in the fuel element, the accurate mathematical physics model was established and the radioactivity of 137 Cs and 134 Cs in the primary circuit of the reactor was obtained with Exact Solution and Simplification of the Burning Relationship of ~ (235) U in Fuel Assembly. The simplified solutions are respectively given, and the comparison between ORIGEN2.0 and exact solutions is given. The results show that as long as the activity ratio (RCs) of ~ (134) Cs and ~ (137) Cs in the primary loop of reactor can be obtained through chemical measurement, the fuel consumption of damaged fuel elements can be calculated by the exact solution model established in this paper To quickly locate the purpose of damage to fuel components.