25 content of initial lots of Hanford UO(sub 3)

摘要

At the time the first UO(sub 3) from so-called ''full-level'' Redox runs was shipped from 224U, the % U(sub 235) as determined in 222-S appeared high when compared with theoretical values from the burn-out curve. Close agreement between the 222-S results and % U(sub 235) determined by K-25 on lots 007, 008, and 009, however, indicated that a considerable heel of cold uranium in Redox had been blended with the first ''full level'' material. This explanation has been verified by data collected over the past weeks and provided this report. It has also been verified by the % U(sub 235) found in lots later than 010* (after most of cold uranium flushed out of Redox) which ranged from 0.66% to 0.64%.