Beryllium will be used as neutron multiplier material to increase the tritium breeding ratio in fusion reactors. The chemical reactivity of beryllium is a factor of major concern since the oxidation of beryllium at temperatures above 800°C can become an uncontrollable process. The present work presents a detailed study of chemical composition and reactivity of Be pebbles after exposure to neutron irradiation, up to 3000 appm He production, during the HIDOBE-01 campaign and their influence in the oxidation kinetics process. In order to get information on this reaction, samples were oxidized at 700°C under controlled air atmosphere (60% humidity) and with a mixture of 60% O₂ + 40% N₂. The chemical composition of the irradiated samples was studied using ion beam analysis and scanning electron microscopy. The observations revealed the presence of small flakes which are distributed in the surface, however no modifications in the pebbles shape after longer oxidation were observed. Ion beam elemental maps confirmed the presence of Be oxides distributed on the surface. Moreover, the width of the oxide layer increases with the annealing time, following a parabolic law.

铍将用作中子倍增材料，以增加聚变反应堆中tri的繁殖率。铍的化学反应性是主要关注的因素，因为铍在800℃以上的温度下氧化可能成为不可控制的过程。本工作提出了在HIDOBE-01战役期间暴露于中子辐照下产生高达3000 appm He的Be卵石的化学组成和反应性的详细研究，以及它们在氧化动力学过程中的影响。为了获得有关该反应的信息，将样品在700°C的受控空气气氛（湿度60％）中与60％O ₂  + 40％N ₂的混合物氧化。使用离子束分析和扫描电子显微镜研究了辐照样品的化学成分。观察结果表明存在小薄片，这些小薄片分布在表面中，但是在较长时间的氧化之后未观察到卵石形状的改变。离子束元素图证实了在表面分布的Be氧化物的存在。此外，根据抛物线定律，氧化物层的宽度随着退火时间而增加。