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ECCS sump strainers

机译:ECCS污水坑过滤器

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摘要

In an emergency loss-of-coolant accident, water inside the primary containment vessel collects at the sump, where it is recirculated for core cooling. In such a situation, conditions inside the PCV would be chaotic, and jets of water or steam from a broken pipe might dislodge fibrous insulation material from pipe lagging. The USNRC has argued persistently that clumps of insulation could block the sump, just like hair clogs a shower plug hole. The issue was flagged as Generic Safety Issue 191, and has affected both BWRs and PWRs. In February 2014 the USNRC announced that Duke Energy's PWR-based Catawba Nuclear Station in South Carolina had met its requirements. A Catawba spokesman said that it had solved the problem by working from both sides. "First, we redesigned our ECCS sump strainer, which gave us a much larger and more effective strainer. We also removed insulation, which helped reduce potential debris generation. We did multiple and significant testing to prove the performance of our newly-designed strainer as well as completed several calculations evaluating the effectiveness of these newly-designed strainers, " said Scott Andresen.
机译:在紧急情况下发生的冷却液损失事故中,主安全壳内的水会聚集在集水槽中,然后在水槽中再循环以进行堆芯冷却。在这种情况下,PCV内部的环境将变得混乱,并且从破裂的管道喷出的水或蒸汽可能会使纤维绝缘材料从管道的滞留中移出。 USNRC一直坚持认为,绝缘块可能会堵塞集水槽,就像头发堵塞了淋浴塞孔一样。该问题被标记为“通用安全问题191”,并且已影响到BWR和PWR。 2014年2月,USNRC宣布杜克能源公司位于南卡罗来纳州PWR的Catawba核电站已达到要求。卡托巴(Catawba)发言人表示,双方已共同努力解决了这一问题。 “首先,我们重新设计了ECCS污水坑过滤器,这使我们得到了更大,更有效的过滤器。我们还去除了隔热材料,这有助于减少潜在的碎屑产生。我们进行了多次重要测试,以证明我们新设计的过滤器具有以下性能:并完成了一些评估这些新设计的过滤器有效性的计算,” Scott Andresen说。

著录项

  • 来源
    《Nuclear Engineering International》 |2014年第717期|40-40|共1页
  • 作者

  • 作者单位
  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-18 00:44:50

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