Development and Validation of Analysis Code for Spallation Products Behavior in Lbe Coolant System of Ads Comparing with the Distribution Data in Megapie Spallation Target

•The computer analysis code TRAIL has been developed to predict the time dependent behavior of SPs within the LBE coolant system of ADS.•The code was verified by comparing the results with the distribution data in MEGAPIE spallation target.•The code could reproduce the released amount of volatile SP material from LBE into the cover gas reasonably.•It is necessary to consider the solubility effect in LBE for the evaluation of noble gas release behavior.