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首页> 外文会议>International topical meeting on nuclear plant instrumentation, control, and human-machine interface technologies >HIGH-TEMPERATURE FISSION CHAMBER FOR He- AND FLiBe-COOLED REACTORS
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HIGH-TEMPERATURE FISSION CHAMBER FOR He- AND FLiBe-COOLED REACTORS

机译：He和FLiBe冷却反应器的高温裂变室

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We have evaluated candidate technologies for in-core fission chambers for high-temperature reactors to monitor power level via measurements of neutron flux from start-up through full power at up to 800°C. This research is important because there are no commercially available instruments capable of operating above 550 °C. Component materials and processes were investigated for fission chambers suitable for operation at 800 °C in reactors cooled by molten fluoride salt (FLiBe) or flowing He, with an emphasis placed on sensitivity (＞ 1 cpsv), service lifetime (2 years at full power), and resistance to direct immersion in FLiBe. The latter gives the instrument the ability to survive accidents involving breach of a thimble. The device is envisioned to be a two-gap, three-electrode instrument constructed from concentric nickel-plated alumina cylinders and using a noble gas-nitrogen fill-gas. We report the results of measurements and calculations of the response of fill gasses, impurity migration in nickel alloy, brazing of the alumina insulator, and thermodynamic calculations.
机译：我们对高温反应堆堆芯裂变室的候选技术进行了评估，以通过测量从启动到最高功率（高达800°C）的中子通量来监测功率水平。这项研究很重要，因为没有可在550°C以上操作的商用仪器。研究了裂变室的组成材料和工艺，该裂变室适合在由熔融氟化盐（FLiBe）或流动的He冷却的反应堆中在800°C的温度下运行，重点是灵敏度（＞ 1 cps / nv），使用寿命（2年全功率），以及抵抗直接浸入FLiBe的能力。后者使仪器能够承受涉及套管损坏的事故。设想该设备是一个两间隙，三电极的仪器，该仪器由同心的镀镍氧化铝钢瓶构成，并使用稀有气体-氮气填充气体。我们报告了填充气体响应，镍合金中杂质迁移，氧化铝绝缘子的钎焊以及热力学计算的测量和计算结果。

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