Determination of the capacity of a helium purification system for the OGL-1 gas loop

The OGL-1 high temperature gas loop which will be constructed in JMTR before the beginning of 1977, is a test facility to develop structural materials and fuels of HTGR. The OGL-1 gas loop uses helium gas as coolant, and graphite, Hastelloy-X and stainless steel as structural materials. At the high-temperature operation of the gas loop from 7500C to 10000C, oxidation of graphite and other structural materials by traces of impurities in the coolant can occur. Therefore, the OGL-1 gas loop has a helium coolant purification system composed of pre-charcoal, molecular-sieve, charcoal and titanium sponge traps. The role of this system is to maintain the concentration of impurities in the coolant in