论文标题
反应堆抗中性替代诺斯用于越南核保障
Practical use of reactor anti-neutrinos for nuclear safeguard in Vietnam
论文作者
论文摘要
低能（少量MEV）中微子的最丰富的人造来源之一，反应堆中微子，不仅可用于研究中微子特性，而且还用于实际应用中。在这项研究中，我们研究了越南核保障的反应堆中微子检测器的实际用途，特别是在达拉特核反应堆，未来的研究设施，大概是具有500〜kW，10 〜MW和1000〜MW热力的商业反应堆。我们计算观察到的倒β衰减事件的速率，以及在检测器质量，检测效率和背景水平的实际假设下提取同位素组成的统计意义。我们发现，根据隔离距离和反应堆的热功率，我们可以使我们能够检测到反应器的开关过渡状态从几个小时到几天。我们研究了背景和能源分辨率如何影响提取的武器 - {}^{239} \ text {pu} $ isotope的精度。我们得出的结论是，为了区分$ {}^{239} \ text {pu} $的10 \％变化，在10〜MW热力反应堆中，放置的1吨检测器必须达到1 \％的背景水平。通过使用10倍较大的检测器或将其放置$ \ sqrt {10} $ times靠近反应堆将背景级别的需求减轻到10 \％，从而增加统计信息。
One of the most abundant man-made sources of low energy (few~MeVs) neutrinos, reactor neutrino, is not only useful for studying neutrino properties, but it is also used in practical applications. In this study, we investigate the practical use of reactor neutrino detectors for nuclear safeguard in Vietnam, specifically at the Dalat Nuclear Reactor, a future research facility, and presumably commercial reactors with 500~kW, 10~MW, and 1000~MW thermal powers, respectively. We compute the rate of observed inverted beta decay events, as well as the statistical significance of extracting isotope composition under the practical assumptions of detector mass, detection efficiency, and background level. We find that a 1-ton detector mass can allow us to detect the reactor's on-off transition state from a few hours to a few days, depending on the standoff distance and reactor thermal power. We investigate how background and energy resolution affect the precision of the extracted weapon-usable ${}^{239}\text{Pu}$ isotope. We conclude that in order to distinguish the 10\% variation of the ${}^{239}\text{Pu}$ in the 10~MW thermal power reactor, a 1-ton detector placed 50~m away must achieve 1\% background level. Increasing the statistics by using a 10x larger detector or placing it $\sqrt{10}$ times closer to the reactor alleviates the requirement of the background level to 10\%.
