2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 9: Molten Salts and Ionic Liquids, Energy Production
| Editors: | Kongoli F, Gaune-Escard M, Turna T, Mauntz M, Dodds H.L. |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 390 pages |
| ISBN: | 978-1-987820-24-9 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
CD shopping page
Experimental research on the formation and controlling of molten salt frozen-wall during the pyroprocessing of spent fuel
zhou jinhao1;1, shanghai, China;
Type of Paper: Regular
Id Paper: 146
Topic: 13
Abstract:
Molten salt frozen-wall is a means for protecting the metallic walls from corrosion by a layer of frozen salt during the pyroprocessing of spent fuel, especially in the process of Fluoride Volatility. The frozen-wall is formed and maintained by controlling the radial temperature gradient, the internal heat source and outer wall cooling are two key factors. In our home-built experimental equipment£¬the research on the formation and controlling of molten salt frozen-wall was carried out by adopting Nitrate Molten Salt (m.p. 142¡æ) and Fluoride Molten Salt(m.p. 454¡æ).The outer wall of test tank was cooled by heat transfer oil or compressed air. The formed frozen-wall is a uniform layer, attaching to the metallic surface tightly. The thickness could be changed from several millimeters to centimeters and it could be figured out by the measured radial gradient temperature. The frozen-wall could reach to static equilibrium by controlling the heat transfer rate. During the period of static equilibrium, the temperature gradient and the thickness of frozen-wall were constant. We also simulated the real application scenarios to test the operation parameters and get some good results. On the other hand, solidification and sustainability characteristics of frozen-wall are analyzed based on the obtained numerical analysis model. Analytical solutions for finding the interface locations at various time steps are obtained and validated by experiments. All the research results will promote the applications of molten salt frozen-wall technology during the pyroprocessing of spent fuel.