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Infrared observation of ballooning and burst of nuclear fuel cladding tubes

机译：红外观察滚球壳覆盖管的膨胀和爆发

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摘要

Nuclear fuel claddings can balloon and rupture at high temperatures under internal gas pressure in case of design basis accidents like loss-of-coolant-accident (LOCA). The thermal phenomena surrounding the ballooning and cracking was investigated in a series of experiments performed using zirconium alloy cladding tubes at the Centre for Energy Research in Hungary.The experiments were recorded using a high-speed infrared camera in the intermediate infrared range and the temperatures were measured in-situ. It was found that before the rupture of the cladding tube, the ballooned cladding surface forms a bulge and heats up locally, a hot spot appears. During crack propagation, the crack tip temperature is significantly warmer than the rest of the tube. The hot spot temperature and the rate of temperature increase was determined. The infrared emission coefficient of the slightly oxidized zirconium cladding samples in the intermediate infrared range was also determined. The emissivity coefficient that fit our measurements was found to be around epsilon = 0.89.
机译：在设计基础事故的情况下，核燃料包衣可以在内部气体压力下的高温下气球和破裂，如冷却剂事故（LOCA）。在匈牙利能源研究中心使用锆合金包层管进行的一系列实验中研究了膨胀和开裂周围的热现象。使用中间红外线范围内的高速红外摄像机进行实验，温度以原位测量。结果发现，在包层的破裂之前，膨胀的包层表面形成凸起并在本地加热，出现热点。在裂缝繁殖期间，裂纹尖端温度比管的其余部分更温暖。测定热点温和温度升高速率。还确定了中间红外范围中略微氧化的锆覆层样品的红外发射系数。拟合我们的测量的发射率系数被发现是epsilon = 0.89周围。

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  • 来源
    《Nuclear Engineering and Design》 |2021年第1期|110942.1-110942.9|共9页
  • 作者

    Nagy Richard; Kir Marton; Petrik Peter; Hozer Zoltan;

  • 作者单位

    Ctr Energy Res Konkoly Thege Miklos Rd 29-33 Budapest Hungary|Obuda Univ Doctoral Sch Mat Sci & Technol Budapest Becsi Rd 96-b Budapest Hungary;

    Ctr Energy Res Konkoly Thege Miklos Rd 29-33 Budapest Hungary;

    Ctr Energy Res Konkoly Thege Miklos Rd 29-33 Budapest Hungary;

    Ctr Energy Res Konkoly Thege Miklos Rd 29-33 Budapest Hungary;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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