反应堆无二次中子源装料和启动

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英文篇名：Reactor Reloading and Startup Without Secondary Neutron Source 作者：章安龙 英文作者：ZHANG Anlong;DayaBay Nuclear Power Operations and Management CO.,LTD.; 关键词：取消二次中子源 ; 源量程计数 ; 反应堆装料和启动 ; 中子通量 ; 氚排放 英文关键词：Eliminating the secondary neutron source;;Source Range count;;Reactor reloading and startup;;Neutron flux 中文刊名：HKXY 英文刊名：Nuclear Science and Engineering 机构：大亚湾核电运营管理有限责任公司技术部; 出版日期：2019-06-15 出版单位：核科学与工程 年：2019 期：v.39;No.157 语种：中文; 页：HKXY201903002 页数：5 CN：03 ISSN：11-1861/TL 分类号：11-15

摘要

二次中子源在反应堆装料和启动时提供中子,使得源量程获得区别于噪声水平的有效计数,用于反应堆的临界监督。随着反应堆通量的提升,在多普勒点出现时,二次中子源对反应堆通量的影响可以忽略。乏燃料组件中锕系核素的自发裂变能够产生大量中子,低泄露装载模式下堆芯外围燃耗较深的乏组件提供的中子源强,也能够使得源量程获得有效计数。大亚湾核电厂的实践经验表明,取消二次中子源是可行的。取消二次中子源能够显著的降低核电厂的氚排放量,并节省大修关键路径。
        The secondary neutron source is used to provide sufficient neutrons to make the source range meters count effectively during low neutron flux period in a reactor,so the secondary neutron source is utilized for the reactor critical supervision. While reactor neutron flux rises to a certain level when the Doppler-point emerges,the influence of secondary neutron source on reactor neutron flux is insignificant. Actinide nuclei in spent fuels can produce a lot of neutrons due to spontaneous fission. Peripheral spent fuel with deep burn-up in a low leakage reloading reactor can provide enough neutrons that will also lead the source range meters to get effective counts. Practical experience in Daya Bay NPP indicates that eliminating secondary neutron source is feasible. This will significantly reduce the tritium discharge and shorten the outage critical path.

引文

[1]廖泽军,孔德萍.秦山核电厂反应堆无源装料及启动[J].核动力工程,2010,31(S2):141-144.
    [2]李树,邓力,徐慧波,等.取消二次中子源后的源量程可用性分析[J].原子能科学技术,2011,45(3):314-318.
    [3]广东核电培训中心.900 MW压水堆核电站系统与设备[M].北京:原子能出版社,2007:254-262.