Enhancing Nuclear Safeguards with Time Series Sketching-Based Nuclear Material Loss Tracking

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Published Oct 26, 2025
Hao Huang Scott Evans Philip Honnold Nathan Shoman

Abstract

Detecting nuclear material loss or leak events is a critical challenge for nuclear safeguards and material accountancy in the recycling of used nuclear fuel. The MAYER (Multi-Sensor Assimilation Yielding Enhanced Reliability) project, part of the ARPA-E CURIE (Converting UNF Radioisotopes Into Energy) program, aims to develop a framework for tracking material loss in nuclear facilities by integrating multisensor data with predictive modeling. In this paper, we introduce MAterial Loss Tracking via Time Series Sketching (MALTS), a deep learning-based method designed to detect material loss events across the nuclear fuel recycling system. MALTS enhances the accuracy and robustness of nuclear material loss tracking by employing time series sketching to capture essential patterns while filtering out sensor noise, resulting in more stable predictions despite sensor noise effects. This approach also improves the time efficiency of material loss tracking by reducing the dimensionality of highfrequency sensor data, thereby enhancing computational scalability and enabling real-time inference. To further provide insights into the leak, MALTS ranks anomalous channels by post-processing results with a pretrained vision-language model (VLM) that considers the system flow diagram, generating a sorted list of anomalous channels from upstream to downstream. The initial leak location is identified as the first upstream channel. Experimental results demonstrate MALTS’s effectiveness and efficiency in accurately identifying unseen nuclear material loss events and pinpointing initial leak locations, making it suitable for deployment within the MAYER digital twin framework for nuclear material safeguards.

How to Cite

Huang, H., Evans, S., Honnold, P., & Shoman, N. (2025). Enhancing Nuclear Safeguards with Time Series Sketching-Based Nuclear Material Loss Tracking. Annual Conference of the PHM Society, 17(1). https://doi.org/10.36001/phmconf.2025.v17i1.4301
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Keywords

nuclear material loss monitoring, time series sensor data, anomaly detection

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