A passive neutron based assaying system for plutonium bearing solid wastes has been designed and developed. The assaying of the plutonium in the drum containing the wastes is determined by as positioned and by rotating the drum to 180 degree and average counts are obtained. The average counts were used for deriving the counting statistics. This system was calibrated with plutonium typically obtained in fast reactor fuel reprocessing facilities with known isotopic compositions. The minimum detection limit has been estimated to be 35 mg. It has been determined that a γ background of up to 2000 mR/h can be tolerated without loss of accuracy.

中文翻译：

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使用被动中子计数法测定 α 固体废物桶

已经设计和开发了一种基于被动中子的含钚固体废物分析系统。含有废物的桶中钚的分析是通过定位和将桶旋转到 180 度来确定的，并获得平均计数。平均计数用于推导计数统计。该系统使用通常在快堆燃料后处理设施中获得的具有已知同位素组成的钚进行校准。最低检测限估计为 35 mg。已经确定可以容忍高达 2000 mR/h 的 γ 背景而不损失准确性。