Study on Tritium Separation from LiPb by Permeation into Na or NaK and Cold Trapping

摘要

The tritium separation and recovery method discussed in this report appears to be a very promising technique for a LiPb self cooled blanket where an intermediate loop is required for safety reasons anyway. This technique can be also of interest for a water cooled LiPb blanket if a tritium purification unit exists in the water loop. Considerable work has been done on cold trapping of hydrogen from Na flows for the fast breeder technology. More work is needed in respect to fusion blanket applications, especially, on hydrogen removal from cold traps by thermal hydride decomposition. This report summarizes the state of the art on the precipitation and decomposition processes and discusses practical experiences with cold traps. Some ideas on a fusion blanket cold trap are outlined and a research program covering the more fundamental aspects for the next future is proposed. (ERA citation 12:022004)