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CN104838446B 添加至少一种氧化还原体系的作为腐蚀性裂变产物调节剂的氧化物核燃料 有权

添加至少一种氧化还原体系的作为腐蚀性裂变产物调节剂的氧化物核燃料
摘要：
添加至少一种氧化还原体系的作为腐蚀性裂变产物调节剂的氧化物核燃料。本发明的主题为一种添加的核燃料，其包含产生诸如碲、铯和碘的裂变产物的氧化物核燃料，所述裂变产物通过化学相互作用而产生潜在腐蚀性物种，其特征在于，所述添加的核燃料添加有至少一种氧化还原体系，所述氧化还原体系包含第一物种和第二物种，所述第一物种和第二物种在两个物种中的每个中包含具有不同氧化态的相同元素，其中所述体系显示出随温度而变化的氧势的曲线，所述曲线位于由以下定界的区间内：·‑上限：在由CsI(l)和CsI(g)之间的平衡所施加的相同分压下的化学物种I2Te(g)和CsI(g)的共存曲线，端部PO2/11和PO2/12具有如下坐标的直线部分在1000℃和2000℃之间估算所述曲线：PO2/11(T＝1000℃)≈‑370kJ/molO2以及PO2/12(T＝2000℃)≈‑230kJ/molO2；·‑下限：体系(Cs2MoO4/Cs+Mo)的氧势曲线，端部PO2/21和PO2/22具有如下坐标的直线部分在1000℃和2000℃之间估算所述曲线：PO2/21(T＝1000℃)≈‑530kJ/molO2以及PO2/22(T＝2000℃)≈‑390kJ/molO2。
摘要（英）：

A supplemented nuclear fuel comprises a nuclear fuel of oxide type which generates fission products such as tellurium, cesium and iodine, which generate via chemical interaction species that are potentially corrosive, supplemented with at least one redox system comprising a first and second species comprising a common element having a different degree of oxidation in each of the two species, the system having an oxygen potential curve as a function of the temperature that is within an interval delimited by: an upper limit: the curve of coexistence of the chemical species I2Te (g) and CsI (g) at the same partial pressure imposed by the equilibrium between CsI (l) and CsI (g), approximated between 1000° C. and 2000° C. by a straight line segment whose ends PO2/11 and PO2/12 have the coordinates: PO2/11 (T=1000° C.)≈−370 kJ/molO2 and PO2/12 (T=2000° C.)≈−230 kJ/molO2; and a lower limit: the curve of oxygen potential of the system (Cs2MoO4/Cs+Mo) approximated between 1000° C. and 2000° C. by a straight line segment whose ends PO2/21 and PO2/22 have the coordinates: PO2/21 (T=1000° C.)≈−530 kJ/molO2 and PO2/22 (T=2000° C.)≈−390 kJ/molO2.

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