Suggested failure probability calculation method for japanese high-quality high-temperature gas-cooled reactor (HTGR) fuel

被引：1
作者：
Aihara, Jun [1 ]
Ueta, Shohei [1 ]
Shibata, Taiju [1 ]
Sawa, Kazuhiro [1 ]
机构：
[1] Oarai Research and Development Center, Japan Atomic Energy Agency, Oarai-machi, Higashiibaraki-gun, Ibaraki 311-1393
来源：
Transactions of the Atomic Energy Society of Japan | 2012年 / 11卷 / 02期
关键词：
Code-B-1; Fuel particle; High-temperature gas-cooled reactor; Irradiation swelling; Irradiation-induced creep; Pyrolytic carbon; Silicon carbide; Very high temperature gascooled reactor;
D O I：
10.3327/taesj.J11.046
中图分类号：
学科分类号：
摘要：
The Japan Atomic Energy Agency (JAEA) has carried out research and development of high-temperature gas-cooled reactors (HTGRs) since 1960s. The high-temperature engineering test reactor (HTTR) has attained full power in 2000. In this study, a failure probability calculation method for Japanese highquality HTGR fuel particles is suggested for the design of Japanese HTGRs. Failure probability is strongly dependent on the irradiation characteristics of pyrolytic carbon (PyC) layers of HTGR fuel particles. However, it is very difficult to obtain new irradiation data of PyC layers with experiments. Therefore, in this study, we calculated failure probabilities using a report summarizing the irradiation data obtained at various irradiation temperatures of PyC layers with various as-fabricated characterisitics and the result of the failure probability measurement of the irradiation test of HTTR fuel. The characteristics of the coating layers of Japanese HTGR fuels, including future fuel types, would be very similar to those of HTTR fuel. In addition, some calculations were carried out with the suggested method. It was shown that the thickening of the SiC layer is more effective in reducing the failure probability than the thickening of the buffer layer. Thus, the thickening of the SiC layer is important for the modification of HTGR fuel for burnup extension, suppressing the increase in core volume. © 2012 Atomic Energy Society of Japan, All Rights Reserved.
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页码：158 / 163
页数：5
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