Pulsed neutron source reference measurements in the subcritical experiment YALINA-Booster
Pulsed neutron source reference measurements in the subcritical experiment YALINA-Booster
复制标题
亚临界实验 YALINA-Booster 中的脉冲中子源参考测量
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
H. Kiyavitskaya
中科院分区：
文献类型：
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作者：
Carl Berglöf;M. Fernández;D. Villamarín;V. Bécares;E. González;V. Bournos;I. Serafimovich;S. Mazanik;Y. Fokov;H. Kiyavitskaya
为了支持在线反应性监测实验，也在本次会议上提出，这项工作介绍了在耦合快热亚临界设施YALINA-Booster中使用脉冲中子源进行的反应性校准测量。这些实验揭示了从一个高度不均匀的岩心中通过实验获得整体反应性的复杂性。此外，还探讨了恒定反应性下改变源倍增对面积比技术的影响。研究发现，用面积比法得到的反应性具有很强的空间依赖性，但可以通过计算的修正系数来处理。另一方面，该方法对源乘法的变化不敏感。结果还表明，除了在深亚临界状态外，瞬发中子衰变常数在堆芯上的变化不大。
In support of an online reactivity monitoring experiment, also presented in this conference, this work presents the reactivity calibration measurements performed with a pulsed neutron source in the coupled fast-thermal subcritical facility YALINA-Booster. These experiments reveal the complexity of experimentally obtaining a global reactivity from a highly heterogeneous core. Moreover, the effect of varying the source multiplication at constant reactivity on the area ratio technique is explored. It is found that the reactivity obtained with the area ratio technique carry strong spatial dependence, but it can be handled by calculated correction factors. On the other hand the method is showed not to be sensitive to changes in the source multiplication. It is also shown that the prompt neutron decay constant does not vary strongly over the core except at deep subcritical states.