Undeclared nuclear activities are challenging given the lack of information from the sites involved in such activities. Wide-area environmental sampling (WAES) can be an effective method to detect undeclared nuclear activities. However, it is crucial to address the potential risks during the WAES, including sample tampering or extortions. Therefore, tracking and monitoring of various on-site data is imperative to accurately interpret the status of samples and workers throughout the WAES process. ‘Environmental and Geographical Data Transfer (EGDT)’ was developed for the real-time monitoring of integrated on-site data. EGDT module is equipped with various sensors and can be attached to a worker’s uniform or a sample storage box. This study demonstrated the technical effectiveness of EGDT by exploring three experimental methodologies for feasibility assessment. Compared to the Normal Operation case, the inference of the Sample Extortion case was predominantly based on changes in lux and dose rate. The inference of the Out-of-Work-Area case primarily relied on changes in dose rate and acceleration. Finally, the preliminary evaluation of the performance of the developed prototype was conducted, and a foundation was established for enhancing the application in the WAES process.

1. Introduction
2. Materials and Methods
    2.1 Design and Configuration of the Environmentaland Geographical Data Transfer(EGDT)
    2.2 Feasibility Evaluation Methodology of theEGDT Based on WAES Cases
3. Results and Discussion
    3.1 Analysis of Results Based on the NormalOperation Case
    3.2 Analysis of Results Based on the SampleExtortion Case
    3.3 Analysis of Results Based on the Out ofWork Area Case
4. Conclusion
Conflict of Interest
Acknowledgements
REFERENCES

• Seungil Ha(Korea Institute of Nuclear Nonproliferation and Control, 1418, Yuseong-daero, Yuseong-gu, Daejeon 34101, Republic of Korea)
• Dalhyeon Ryu(Korea Institute of Nuclear Nonproliferation and Control, 1418, Yuseong-daero, Yuseong-gu, Daejeon 34101, Republic of Korea)
• Giyoon Kim(Korea Institute of Nuclear Nonproliferation and Control, 1418, Yuseong-daero, Yuseong-gu, Daejeon 34101, Republic of Korea)
• Myungsoo Kim(Korea Institute of Nuclear Nonproliferation and Control, 1418, Yuseong-daero, Yuseong-gu, Daejeon 34101, Republic of Korea) Corresponding author