氦气试验回路中的氦净化

为了减少结构材料的腐蚀并验证高温气冷实验堆中的氦净化工艺，在氦气试验回路中设置了氦净化系统并进行了试验。试验结果表明，净化流量为５０ｍ＾３／ｈ的主要由分子筛和深活性炭床组成的氦净化系统，能把氦中２００００ｃｍ＾３／ｍ＾３的化学杂质净化到７６ｃｍ＾３／ｍ＾３以下。所采用的氦中痕量杂质分析测量技术达到１０＾－１ｃｍ＾３／ｍ＾３精度。

Purification of Helium Gas for the Helium Test Loop

The helium purification system of the Helium Test Loop was constructed for demonstrating test of the High Temperature Gas-cooled Reactor. The helium purification system mainly consists of molecular sieve and cryogenic charcoal bed, It can be served to purify 50m3/ h bypassing helium gas. The results of purifying tests show that more than 20000cm3/m3 impurity content (including H2O. H2. N2. CO. CO2. CH4. O2. Ar et al) in helium can be decreased to 76cm3/m3 which is less than the value designed for HTR-10. The test shows that the sensitivity and accuracy of impurity content analyzing and measuring in helium gas is better than 10 -1 cm3 / m3.