Economic value of the development of nuclear power plant decommissioning technology in South Korea

Lee, Juyong; Cho, Youngsang

doi:10.1016/j.enpol.2023.113695

Cited by 6 publications

(2 citation statements)

References 58 publications

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“…As of August 2023, according to the statistics served by the Power Reactor Information System (PRIS) of the International Atomic Energy Agency (IAEA), globally, 410 nuclear power plants are in operation, 209 are end-of-life plants, and only 21 were decommissioned entirely [1]. Of those in operation, 68% and 24.5% are ancient facilities with average life spans longer than 30 and 40 years, respectively, and worldwide decommissioning processes are expected to increase gradually [2,3]. When decommissioning nuclear facilities, hundreds of thousands of tons of various wastes, such as concrete, metal, soil, and liquid waste, are generated; it has become a pending global issue to acquire technologies related to volume reduction, solidification and stabilization, and recycling [4,5].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Solidification of Radioactive Wastes Using Blast Furnace Slag as a Solidifying Agent

Jeon,

Lee,

Lee

et al. 2023

Materials

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The decommissioning process of nuclear power facilities renders hundreds of thousands of tons of various types of waste. Of these different waste types, the amount of concrete waste (CW) varies greatly depending on the type of facility, operating history, and regulation standards. From the previous decommissioning projects, CW was estimated to comprise 60–80 wt.% of the total weight of radioactive wastes. This represents a significant technical challenge to any decommissioning project. Furthermore, the disposal costs for the generated concrete wastes are a substantial part of the total budget for any decommissioning project. Thus, the development of technologies effective for the reduction and recycling of CW has become an urgent agenda globally. Blast furnace slag (BFS) is an industrial byproduct containing a sufficient amount (higher than 30%) of CaO and it can be used as a substitute for ordinary Portland cement (OPC). However, there have been few studies on the application of BFS for the treatment of radioactive waste from decommissioning processes. This study was conducted to evaluate the performance of the solidification agent using ground granulated BFS (SABFS) to pack radioactive wastes, such as the coarse aggregates of CW (CACW), waste soil (WS), and metal waste (MW). The analytical results indicated that the CaO content of the ground granulated BFS was 36.8% and it was confirmed that calcium silicate hydrate (CSH) could be activated as the precursor of the hydration reactions. In addition, the optimum water-to-binder ratio was determined to be 0.25 and Ca(OH)2 and CaSO4 were found to be the most effective alkaline and sulfate activators for improving the compressive strength of the SABFS. The maximum packing capacities of the SABFS were determined to be 9 and 13 wt.% for WC and WM, respectively, when the content of CW was fixed at 50 wt.%. The results of the leaching tests using SABFS containing radioactive wastes contaminated with Co, Cs, and Sr indicated that their leachability indices met the acceptance level for disposal. Consequently, the SABFS can be used as a solidifying agent for the safe disposal of radioactive waste.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the Solidification of Radioactive Wastes Using Blast Furnace Slag as a Solidifying Agent

Jeon,

Lee,

Lee

et al. 2023

Materials

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“…Fuzzy-AHP, utilizing fuzzy numbers defined by multiple values rather than a single value, determined the weights based on the 9-point triangular fuzzy numbers applied by Kaya [39]. By mixing works of [39][40][41] we developed Table 7. The evaluation of attribute weights commenced with the development of a comprehensive questionnaire, followed by the administration of surveys and expert interviews.…”

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Risk Evaluation of Radioactive Concrete Structure Decommissioning in Nuclear Power Plants Using Fuzzy-AHP

Moon,

Mirmotalebi,

Jang

et al. 2024

Buildings

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Over 50% of nuclear power plants (NPPs) worldwide have operated for over three decades, leading to a surge in decommissioning projects. This study addresses the gap in current guidelines by analyzing risks in nuclear decommissioning. Using the fuzzy-AHP technique, tasks within dismantling radioactive concrete structures are prioritized. Findings reveal structural and human-related risks across five main cutting tasks. Collision emerges as a significant concern, particularly during wire saw installation and concrete block hoisting hole creation. Subcategory risk priorities highlight variations in risk across tasks, with jamming, falling, and falling objects identified as top concerns during wire saw transportation. This study emphasizes the importance of comprehensive risk assessment in enhancing safety during decommissioning. It underscores the need to consider both physical risks and risks to personnel throughout the process. By prioritizing safety, stakeholders can ensure worker safety and operational efficiency while minimizing hazards. This research contributes to standardized safety protocols for nuclear decommissioning worldwide, aligning with sustainable energy practices. The outcomes offer practical insights for safety manual development and decision-making processes. This study represents progress in ensuring safety during nuclear decommissioning, paving the way for further refinement of safety protocols and guidelines tailored to decommissioning sites.

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Ready for Nuclear Energy? a Road to Peaceful Nuclear Power Generation Development in the Kingdom of Saudi Arabia: Vision 2030

Ali,

Shams,

Al-Athel

2024

Lecture Notes in Mechanical Engineering

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Economic value of the development of nuclear power plant decommissioning technology in South Korea

Cited by 6 publications

References 58 publications

Evaluation of the Solidification of Radioactive Wastes Using Blast Furnace Slag as a Solidifying Agent

Evaluation of the Solidification of Radioactive Wastes Using Blast Furnace Slag as a Solidifying Agent

Risk Evaluation of Radioactive Concrete Structure Decommissioning in Nuclear Power Plants Using Fuzzy-AHP

Ready for Nuclear Energy? a Road to Peaceful Nuclear Power Generation Development in the Kingdom of Saudi Arabia: Vision 2030

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