Compatibility of advanced tritium breeders and neutron multipliers
Compatibility of advanced tritium breeders and neutron multipliers
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先进氚增殖器和中子倍增器的兼容性
DOI：
10.1016/j.fusengdes.2020.111581
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发表时间：
2020
影响因子：
1.7
通讯作者：
Masaru Nakamichi
中科院分区：
文献类型：
--
作者：
Jae-Hwan Kim;Masaru Nakamichi
提出了一种使用氚增殖器和中子倍增器混合的新型示范（DEMO）聚变反应堆的概念。这个概念需要氚增殖器和中子增殖器之间的长期稳定。为了验证混合卵石填料概念的可行性，在973 K、1073 K和1173 K下，分别对Li-access Li2+xTiO3+y与20% Li2ZrO3（以下简称LTZO）和Be12V作为先进的氚增殖剂和中子增殖剂进行了配合性试验，分别为100 h、300 h和1000 h。横断面扫描电镜观察和x射线衍射（XRD）分析表明，在Be表面形成了小强度的Be氧化物（Li），但没有发现反应层，也没有发现很薄的反应层。可以清楚地看到，随着在每个温度下的时间的增加，厚度有增加的趋势。反应层的厚度可以用抛物线速率定律来描述。结果表明，与LTZO接触的Be12V形成的反应层生长速率比与LTZO接触的Be低一个数量级。
A new blanket concept of demonstration (DEMO) fusion reactors has been suggested using a mixture of tritium breeders and neutron multipliers. This concept requires long-term stability between tritium breeders and neutron multipliers. To verify the feasibility of the mixing pebble packing concept, compatibility tests of Li-access Li2+xTiO3+ywith 20 % Li2ZrO3(hereinafter referred to as LTZO) and Be12V as an advanced tritium breeder and neutron multiplier, respectively were performed at 973 K, 1073 K, and 1173 K for 100 h, 300 h, and 1000 h, respectively. Cross-sectional scanning electron microscopic observations and X-ray diffraction (XRD) analysis revealed that Be oxides (Li with small intensity) were formed on the surface of Be, however, no reaction layer or a very thin layer was identified. Clarity was received that as the time at each temperature increased, the thickness tended to increase. The thickness of the reaction layer could be described by a parabolic rate law. The conclusion was reached that Be12V in contact with LTZO had a reaction layer whose growth rate was considerably lower by one order of magnitude than that of Be in contact with LTZO.
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