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    • 9. 发明公开
    • LONG-LIFESPAN IN-CORE INSTRUMENT
    • 长寿命核心仪器
    • EP3214621A1
    • 2017-09-06
    • EP15854311.6
    • 2015-08-13
    • Korea Hydro & Nuclear Power Co. Ltd.
    • CHA, Kyoon HoKIM, Yong DeogROH, Koyung HoKIM, Yong Bae
    • G21C17/108G01T3/00
    • G01T3/006G01T3/00G21C17/104G21C17/108G21C17/112G21C17/116
    • A long-lifespan in-core instrument having an extended lifespan due to an enhanced combustion lifespan of an emitter according to the present invention comprises: a central tube; an outer sheath tube distanced from the outer circumferential surface of the central tube; self-powered neutron detectors placed between the central tube and outer sheath tube, and each comprising an emitter of a material having a reaction cross section with neutron that is comparatively smaller than that of rhodium; a background detector for compensating for the background noise signal; core exit thermocouples for detecting the core exit temperature; and filler wires filling in the space between the self-powered neutron detectors, background detector and core exit thermocouples, and as such, the present invention can markedly reduce the amount of spent in-core instrument waste, which is high-level radioactive material, and thus can contribute in securing a utility space for the high-level waste material, as well as in reducing radiation exposure of the nuclear power plant personnel.
    • 由于根据本发明的发射器的燃烧寿命增加而具有延长的寿命的长寿命的堆芯内仪器包括:中心管; 远离中心管的外周面的外套管; 自供电的中子探测器,放置在中心管和外套管之间,并且每个中子探测器包括具有反应截面的材料的发射器,反应截面的中子比铑的反应截面小; 背景检测器,用于补偿背景噪声信号; 用于检测堆芯出口温度的堆芯出口热电偶; 填充在自供电中子探测器,背景探测器和核心出口热电偶之间的空间中的填充金属丝,因此,本发明可以显着减少作为高级放射性材料的废芯内仪器浪费量, 因此可以有助于确保高水平废料的实用空间以及减少核电厂人员的辐射暴露。