摘要
A chemical separation technique for removing interfering gamma-ray radionuclides by combined precipitation of Nb pentoxide and anion exchange was proposed, thereby allowing detection of trace 94 Nb in low-level radwastes. The detection limit for 94 Nb was improved by a factor of 10–10 3 , and the scaling factor ( 94 Nb/ 60 Co) of the radwastes was estimated to be less than 10 −5 . This technique can be used for low-level radwaste classification and power reactor decommissioning.