| Autor: |
Yunu Lee, Seokjoo Yoon, Nayoung Kim, Dokyu Kang, Hyeongbin Kim, Wonseok Yang, Miloš Burger, Igor Jovanovic, Sungyeol Choi |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Nuclear Engineering and Technology, Vol 54, Iss 12, Pp 4431-4440 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
1738-5733 |
| DOI: |
10.1016/j.net.2022.07.014 |
| Popis: |
An advanced nuclear reactor based on molten salts including a molten salt reactor and pyroprocessing needs a sensitive monitoring system suitable for operation in harsh environments with limited access. Multi-element detection is challenging with the conventional technologies that are compatible with the in-situ operation; hence laser-induced breakdown spectroscopy (LIBS) has been investigated as a potential alternative. However, limited precision is a chronic problem with LIBS. We increased the precision of LIBS under high temperature by protecting optics using a gas protective layer and correcting for shot-to-shot variance and lens-to-sample distance using a laser-induced acoustic signal. This study investigates cerium as a surrogate for uranium and corrosion products for simulating corrosive environments in LiCl–KCl. While the un-corrected limit of detection (LOD) range is 425–513 ppm, the acoustic-corrected LOD range is 360–397 ppm. The typical cerium concentrations in pyroprocessing are about two orders of magnitude higher than the LOD found in this study. A LIBS monitoring system that adopts these methods could have a significant impact on the ability to monitor and provide early detection of the transient behavior of salt composition in advanced molten salt-based nuclear reactors. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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