计算结果表明，中子活化在线分析系统的最优化慢化材料为聚乙烯。
The results lay the foundation for the study of on-line neutron activation analysis system.
氢化锆因具备诸多作为反应堆中子慢化材料的优点，有着良好的应用前景。
Zirconium hydride has excellent practical prospects due to its properties as neutron-moderator material in nuclear reaction piles.
石墨广泛地用做核反应堆慢化材料、反射层材料和堆芯结构材料，在高温气冷堆中还用来做燃料元件。
In nuclear reactors, graphite is used widely as moderators, reflectors, constructive materials of reactor core and fuel elements in high temperature gas cooled reactors.
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