Year
1973
Abstract
A non-destructive assay technique was developed for use at GE-Wilmington for the determination of the uranium and uranium-235 content of large (41 x 4\" x 4') wooden crates. These wooden crates contain heterogeneous mixtures of combustible and non-combustible materials contaminated with low-enriched uranium. The assay technique is based on the passive signature of 23l*mPa, a 238U daughter. A description of the physics mechanisms and method of routine operation is presented. The calibration technique is outlined and the experimental justification for assumptions is discussed. Error modeling is described and current error estimates stated. A summary is given providing illustrations for additional applications of this passive gamma technique for the assay of low-enriched uranium contained in other processing residuals, such as 55- gallon drums and absolute filters.