Systems analysis of hiRX for improved reprocessing safeguards.

The goal of this work was to examine the potential safeguards improvement of the High Resolution X-ray (hiRX) technology for aqueous reprocessing plants. Existing plants utilize KEdge and Hybrid K-Edge Densitometry for routine accountancy measurements for the key input and output accountability tanks. The IAEA also use these technologies for verification measurements. The hiRX technology has the potential to significantly reduce the measurement uncertainty with an equally simple but less costly instrument that uses a much smaller sample size. Such a technology could be highly desirable for both the operator and inspector. This work utilizes a Separations and Safeguards Performance Model of a PUREX reprocessing plant to determine the safeguards improvement offered by the reduced measurement uncertainty of hiRX. Results show that a significant improvement in the ability to detect a protracted diversion may be possible.