核级一词，其实是根据化学“核级钠”的名称借鉴而来。核级纳具有高于多数金属的比热和良好的导热性能，能够适应反应堆的特殊条件。
该方法满足了核级钠对碳分析所要求的技术指标。
This method has met the technical requirements for carbon analysis in nuclear grade sodium.
本方法可应用于核级钠及钠厂净化工艺过程钠中钙的分析。
This method has been applied to determine concentration of calcium in nuclear grade sodium and sodium sample from purification technology procedure in sodium production factory.
本实用新型公开了一种用于大型核电站的核级高压离心风机。
The utility model discloses a nuclear-grade high-pressure centrifugal fan used for a large-scale nuclear power plant.
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