• Proceedings of the Korean Nuclear Society Conference
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• 2004.10a
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• pp.1417-1418
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• 2004

• Proceedings of the Korean Nuclear Society Conference
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• 2005.05a
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• pp.1183-1184
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• 2005

• Proceedings of the Korean Nuclear Society Conference
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• 1996.11b
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• pp.749-754
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• 1996

본 논문은 CANDU형 원자력 발전소의 수조 속에 저장된 사용후핵연료 다발에 대한 IAEA 보장조치(Safeguards) 방법(Method K)을 종합적으로 분석하여 국가사찰을 보다 효율적으로 준비하고자 한다. 현재 IAEA는 수중카메라(Underwater TV Camera)를 수조 속에 넣고 카메라 모니터에 나타난 사용후핵연료 끝단의 영상을 직접 확인하면서 Tray Stack에 담겨 있는 수직축(Z-축) 방향 사용후핵연료 다발 수량을 확인하고 있다. 그러나 한정된 사찰기간 내에 보장조치 목적(Safeguards Goal)을 달성하기 위해 IAEA가 적용하고 있는 수중 카메라 보조장치(Guiding Tool)는 몇 가지 문제점을 갖고 있는 것으로 분석되었다. 따라서 이와 같은 문제점을 해결하면서 보다 효율적으로 사찰활동을 지원할 수 있는 보조장치를 개발하는 것이 IAEA와 국가사찰을 위해 필요하다. 이를 위해 한정된 사찰기간 내에 최소의 인력으로 효과적인 사찰활동을 지원할 수 있는 보조장치를 새로이 설계하였다. 그리고 새로이 설계된 수중카메라 보조장치를 IAEA 및 국가사찰에 적용했을 경우 얻을 수 있는 기대 효과 등을 논의하였다.

• Nuclear Engineering and Technology
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• v.54 no.2
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• pp.637-643
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• 2022

Uranium and plutonium are required to be accounted in spent fuel head-end and major recovery area in pyro-process for safeguards purpose. The possibility of neutron resonance technique, as a nondestructive analysis, was simulated on isotopic fissile analysis for large scale process. Neutron resonance technique has advantage to distinguish uranium from plutonium directly in mixture. Simulation was performed on U235 and Pu239 assay in spent fuel and for scoping examination of assembly type. The resonance energies were determined for U235 and Pu239. The linearity in the neutron transmission was examined for the selected resonance energies. In addition, the limit for detection was examined by changing sample density, thickness and content for actual application. Several factors were proposed for neutron production and the moderated neutron source was simulated for effective and efficient transmission measurement. From the simulation results, neutron resonance technique is promising to analyze U235 and Pu239 for spent fuel assembly. An accurate fissile assay will contribute to an increased safeguards for the pyro-processing system and international credibility on the reuse of fissile materials in the fuel cycle.

• Journal of the Korean Society of Radiology
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• v.17 no.7
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• pp.1189-1195
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• 2023

In scenarios involving inspections and verifications of nuclear facilities, ensuring the proper functioning of on-site safeguards equipment is crucial. There have been precedents in Kazakhstan where equipment failed to operate properly due to extremly cold temperatures, and the year-round minimum temperature at North Korea's Punggye-ri nuclear test site is approximately minus 30 degrees Celsius. To ensure the proper functioning of equipment in extreme environments for on-site verification of nuclear activities on the Korean Peninsula, relevant research is necessary. This includes confirming the functionality of equipment used in inspections and verifications, as well as analyzing factors that may disrupt their normal operation. This study aims to conduct a risk analysis for the normal operation of equipment in extreme environments and develop criteria and procedures for environmental-based performance testing. To achieve this, we conducted a risk analysis based on IAEA safeguards, analyzed the utilization of equipment, and performed a risk analysis associated with transportation for on-site verification considering the environmental characteristics of the Korean Peninsula. Furthermore, we provided performance testing criteria and procedures. The research results can be utilized as reference material in the verification and monitoring processes of nuclear activities.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2018.11a
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• pp.51-52
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• 2018

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2018.05a
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• pp.23-24
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• 2018

• Nuclear Engineering and Technology
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• v.48 no.2
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• pp.285-292
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• 2016

Reactor neutrinos have been detected in the past 50 years by various detectors for different purposes. Beginning in the 1980s, neutrino physicists have tried to use neutrinos to monitor reactors and develop an optimized detector for nuclear safeguards. Recently, motivated by neutrino oscillation physics, the technology and scale of reactor neutrino detection have progressed considerably. In this review, I will give an overview of the detection technology for reactor neutrinos, and describe the issues related to further improvements in optimized detectors for reactor monitoring.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2018.11a
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• pp.39-40
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• 2018

• Proceedings of the Korean Nuclear Society Conference
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• 2004.10a
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• pp.1447-1448
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• 2004

As the plants are classified as a bulk facility by the Agency's safeguards criteria, the Material Balance Evaluation is a good tool to timely detect diversion that will be accomplished through the creation of defects as small as bias defects. Through all evaluations made by the Agency, it Is strongly recommended to report SRD based on both weight and enrichment, maintain the reliable MUF declaration and improve the gamma spectrometry measurement procedure. These recommendations have been now applied and are going on.