空氣之被動式移熱能力應用於用過燃料池之研究

Investigation of passive air cooling capacity for spent fuel pool

曹博智(Po-Chih Tsao)

指導教授 ： 洪祖全 ； 曾永信

國立臺北科技大學/機電學院/機電整合研究所/碩士(2014年)

https://doi.org/10.6841/NTUT.2014.00815

摘要

本文主要目的為提升用過燃料池(Spent fuel pool, SFP)內移熱能力並提升其安全性，並利用一非比例縮小的裝置進行實驗及數值模型的建立及分析。本研究探討當事故發生後，燃料池無水的情況下，空氣是唯一能將熱量自燃料池內移除的唯一介質。研究方法以數值模擬方法結合實驗以進行池內流場的探討，並完成實驗及數值模擬方法的驗證。因此本文將較難以改變的幾何參數於數值模擬方法中建模並進行模擬熱流場的結果與討論。研究結果指出自然對流模型中，底板高度、底板流道數量、不同瓦數燃料束擺放位置以及模型內幾何皆為影響自然對流效果的重點因素。此外，本文也利用灑水噴頭配合自然對流進行了降溫實驗，結果顯示灑水的降溫效果約可提升5%至15%左右。

關鍵字

用過燃料池 ； 自然對流 ； 數值模擬

並列摘要

This study is committed to enhancing the security of spent fuel pool (SFP). The unscaled experiment and numerical analyses of SFP have been implemented in present study. In case SFP is waterless after the accident, air is the only medium to remove the heat out of the pool. The flow phenomena will be investigated via mainly computational fluid dynamics (CFD) and the experiments as auxiliary. The verification between experimental results and CFD simulation was completed. Therefore, the parameters in the experiment that are difficult to be changed will be investigated via the CFD simulations. Results of experiments and simulations have indicated that the height of backplane, amount of backplane channels, location of bundles in different power and the model geometry are the important parameters under the existence of natural convection. In the other hand, the spray experiments to remove the heat have also been accomplished in the present study. The achievements have demonstrated that the cooling effect can be improved while supplemented by natural convection, it can be upgraded about 5% to 15%.

並列關鍵字

Spent fuel pool(SFP) ； natural convection ； CFD

參考文獻

[1] Y. Kim, W. Kim and M. Kim, “An international analysis of public acceptance of nuclear energy,” Energy Policy, vol. 66, 2014, pp. 475-483.

[8] T.W. Bowyer, S.R. Biegalski, M. Cooper, P.W. Eslinger, D. Haas, J.C. Hayes, H.S. Miley, D.J. Storm and V. Woods, “Elevated radioxenon detected remotely following the Fukushima nuclear accident,” Journal of Environmental Radioactivity, vol. 102, 2011, pp. 681-687.

[9] A. Leelossy, R. Meszaros and I. Lagzi, “Short and long term dispersion patterns of radionuclides in the atmosphere around the Fukushima Nuclear Power Plant,” Journal of Environmental Radioactivity, vol. 102, 2011, pp. 1117-1121.

[11] K. Zhang, M. Yang, J. Wang and Y. Zhang, “Experimental study on natural convection in a cylindrical envelope with an internal concentric cylinder with slots,” International Journal of Thermal Sciences, vol. 76, 2014, pp. 190-199.

[12] X.R. Zhang, Y. Zhang and L. Chen, “Experiment study on solar thermal conversion based on supercritical natural convection,” Renewable Energy, vol. 62, 2014, pp. 610-618.