Hydrogen permeation from F82H wall of ceramic breeder pebble bed: The effect of surface corrosion
Hydrogen permeation from F82H wall of ceramic breeder pebble bed: The effect of surface corrosion
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DOI：
10.1016/j.ijhydene.2021.11.225
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发表时间：
2021-12
影响因子：
7.2
通讯作者：
K. Mukai;S. Kenjo;Naoto Iwamatsu;Bakr Mahmoud;T. Chikada;J. Yagi;S. Konishi
中科院分区：
文献类型：
--
作者：
K. Mukai;S. Kenjo;Naoto Iwamatsu;Bakr Mahmoud;T. Chikada;J. Yagi;S. Konishi
了解氚在球床增殖毯中的渗透行为，对于在核聚变反应堆中建立自给自足的燃料循环至关重要。陶瓷增殖材料释放的气体在还原活化铁素体-马氏体（RAFM）钢表面形成双腐蚀层，但其对氢渗透行为的影响尚未阐明。本文在添加h2的扫气条件下，原位测量了氢气通过陶瓷增殖器球床F82H RAFM壁的渗透率。在F82H试样上形成的腐蚀层具有致密的微观结构，使氢渗透通量降低了至少一个数量级。在毯状水冷剂温度下，渗透降低系数为20 ~ 50。当腐蚀在繁殖毯内自发发生时，预计表面氧化层具有自我修复能力。
Understanding the permeation behavior of tritium from a pebble bed breeding blanket is essential for establishing a self-sufficient fuel cycle in a nuclear fusion reactor. It is known that double corrosion layers forms on reduced activation ferritic-martensitic (RAFM) steel surface by gas release from a ceramic breeder material, however, its effect on hydrogen permeation behavior has not been elucidated. Herein, in-situ measurement of hydrogen permeation through an F82H RAFM wall of a ceramic breeder pebble bed was performed under H2-added sweep gas conditions. The corrosion layer formed on the F82H sample had a dense microstructure, which reduced hydrogen permeation flux at least by one order of magnitude. The permeation reduction factors were 20–50 at the water-coolant temperature of a blanket. A self-repairing ability is expected for the surface oxide layer as the corrosion occurs spontaneously inside a breeding blanket.