AN INNOVATIVE SPHERICAL FUEL ELEMENT TO INHIBIT THE INFILTRATION OF LIQUID FLUORIDE SALT IN MOLTEN SALT REACTOR
文献类型：会议论文
| 作者 | Zhong, YJ; Lin, J; Xu, LJ; Jiang, HT; Zhu, ZY |
| 出版日期 | 2017 |
| 会议日期 | JUL 02-06, 2017 |
| 会议地点 | Shanghai, PEOPLES R CHINA |
| 关键词 | MESOCARBON MICROBEADS ISOTROPIC GRAPHITE COMPOSITES CARBON |
| 期号 | — |
| 英文摘要 | To inhibit the infiltration of liquid fluoride salt and easy to load and unload, fuel element in molten salt reactor (MSR) was isostatically pressed with an innovative design: A fuel-free low density graphite core of <= 30 mm diameter embedded in fuel zone shell of >= 2.5 mm thickness, and then enveloped in a high density graphite shell of >= 5 mm thickness. Bulk density of the spherical fuel element can be designed from the range of 1.65-1.80 g/cm(3), which is lower than the density of the liquid fluoride salt to make sure the fuel element can float in the MSR to load and unload. Characteristics of mercury infiltration and molten salt infiltration in graphite shell were investigated and compared with A3-3 graphite to identify the infiltration behaviors. The results indicated that the graphite shell has a low porosity about 9%, and an average pore diameter of 100 nm. The fluoride salt occupation of A3-3 was 10 wt% under 6.5 atm, whereas the salt gain did not infiltrate in graphite shell even up to 6.5 atm. It demonstrated that the outside graphite shell could inhibit the infiltration of liquid fluoride salt effectively. At the operating temperature of MSR (700 degrees C), thermal conductivity of graphite shell was 13.61 W/m K. The coefficient of thermal expansion (CTE) of outside graphite shell lied in 6.01x10(-6) K-1 (alpha,) and 6.15x10(-6) K-1 (alpha(perpendicular to)) at the temperature range of 25-700 degrees C. The anisotropies factor of graphite shell calculated by CTE maintained below 1.12, which could meet the requirement of the spherical fuel element (below 1.30). The constant isotropic properties of graphite shell are beneficial for the integrity and safety of the spherical fuel element for a MSR. |
| 会议录 | PROCEEDINGS OF THE 25TH INTERNATIONAL CONFERENCE ON NUCLEAR ENGINEERING, 2017, VOL 3
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| 文献子类 | 会议论文 |
| 语种 | 英语 |
| ISBN号 | 978-0-7918-5781-6 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/31918]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Inst Appl Phys, Ctr Excellence TMSR Energy Syst, Shanghai, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhong, YJ,Lin, J,Xu, LJ,et al. AN INNOVATIVE SPHERICAL FUEL ELEMENT TO INHIBIT THE INFILTRATION OF LIQUID FLUORIDE SALT IN MOLTEN SALT REACTOR[C]. 见:. Shanghai, PEOPLES R CHINA. JUL 02-06, 2017. |
入库方式： OAI收割
来源：上海应用物理研究所
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