摘要
采用气相渗透方法,开展了国产低活化铁素体/马氏体钢(RAFM钢)之一的CLAM钢的氚渗透实验,研究了影响渗透的关键因素,建立了可靠的实验方法。在573~823K温度范围内,得出氚的渗透率ΦT为2.57×10-8exp(-38639/RT),氚溶解度ST为2.2×10-1exp(-38639/RT),扩散系数DT为1.17×10-7exp(-22011/RT)。另外,氘氚混合渗透时存在明显的正同位素效应,在实验温度范围内,推导得出的氘氚渗透分离系数αDT为1.42,氕氚渗透分离系数αHT为3.76。
The tritium permeability of CLAM steel, one of the low activated ferrite/martensite steels(RAFM steels) made in China, have been experimentally measured by means of the gas evolution permeation technique over the temperature range of 573-823 K. The resultant permeability ΦT is 2.57×10~(-8) exp(-38639/RT), the deduced diffusivity D_T is 1.17×10~(-7) exp(-22011/RT) and Sieverts' constant S_T is 2.2×10-1 exp(-38639/RT). Again, there is an obvious isotope effect on D-T mixture permeation in which the permeability of deuterium is larger than that of tritium. The permeation separation coefficient αDT is 1.42 for D-T, and αHT is 3.76 for H-T.
引文
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