Development of insulating system for FBR electro-magnetic pump

Proceedings of 1994 4th International Conference on Properties and Applications of Dielectric Materials (ICPADM) Pub Date : 1994-07-03 DOI:10.1109/ICPADM.1994.414049

M. Ishida, Y. Ikeda, N. Naohara, H. Mitsui, T. Kuroki

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引用次数: 3

Abstract

Development of sodium immersed type electro-magnetic pumps (EMP) is expected to improve the reliability, safety, maintainability, and construction cost of FBR compared with the conventional mechanical pumps. To realize electro-magnetic pumps, establishment of a high-temperature-resist electrical insulating system is indispensable. The authors had selected a mica-alumina combination for the insulating system at temperatures higher than 500/spl deg/C. Using this insulating system, an ageing pre-test was performed. The ageing condition was to apply 1.5 kV AC voltage in a nitrogen atmosphere at 550/spl deg/C for 4000 hours. The dielectric properties before and after ageing were measured to understand the tendency of temporal change in ageing. In this result, dielectric performance after ageing was improved compared with the initial one. This phenomenon was clarified to be caused by a decrease of organic component in the insulation. Also, the possibility of the thermal runaway was considered to be higher as a dielectric breakdown mechanism.<>

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FBR电磁泵绝缘系统的研制

与传统的机械泵相比，钠浸式电磁泵的发展有望提高快堆的可靠性、安全性、可维护性和造价。为了实现电磁泵，必须建立耐高温的电绝缘系统。在高于500/spl℃的温度下，作者选择了云母-氧化铝组合作为绝缘系统。利用该绝缘系统进行了老化预试验。老化条件是在550/spl度/C的氮气气氛中施加1.5 kV交流电压4000小时。测定了老化前后的介电性能，了解了老化的时间变化趋势。结果表明，老化后的介电性能比老化前有所提高。澄清了这一现象是由于绝缘材料中有机成分的减少引起的。此外，热失控的可能性被认为是一个更高的介电击穿机制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of 1994 4th International Conference on Properties and Applications of Dielectric Materials (ICPADM)

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