Examination of Transmutation Effect on Responses of K-Type and N-Type Thermocouples at Fusion Blanket
Examination of Transmutation Effect on Responses of K-Type and N-Type Thermocouples at Fusion Blanket
复制标题
熔合毯处 K 型和 N 型热电偶响应的嬗变效应检验
DOI：
10.1080/15361055.2019.1658039
复制
发表时间：
2019
影响因子：
0.9
通讯作者：
Yoshino Masahito
中科院分区：
文献类型：
--
作者：
Tanaka Teruya;Noto Hiroyuki;Sato Fuminobu;Hishinuma Yoshimitsu;Sakaue Hiroyuki A.;Yoshino Masahito
为了检查K型和N型热电偶中的核嬗变对聚变反应堆中温度测量的影响，制造了具有改变的成分的热电偶，并且在高达800°C的温度下获得了它们的响应。热电偶的成分根据嬗变计算进行了改变，模拟了第一道墙使用3.5年、4.6年和7年以及辐射屏蔽前表面使用40年的情况。在800°C下与商业热电偶的响应比较表明，具有改变的成分的K型和N型热电偶模拟在第一壁处使用7年，表明温度降低20%至25%。在此条件下，用于模拟嬗变元素的添加剂粉末的重量比为~ 3%。商业热电偶和模拟嬗变热电偶之间的响应差异取决于添加剂粉末的重量比。本数据可用于估计用于长期运行在聚变堆中的热电偶的响应退化。
To examine the impact of nuclear transmutation in K-type and N-type thermocouples on temperature measurements in a fusion reactor, thermocouples with altered compositions were fabricated, and their responses were obtained at up to 800°C. The compositions of the thermocouples were altered according to transmutation calculations simulating the 3.5-, 4.6-, and 7-year use at the first wall and 40-year use at the front surface of the radiation shield. Comparison of the responses with commercial thermocouples at 800°C showed that the K-type and N-type thermocouples with altered composition simulating the 7-year use at the first wall indicate 20% to 25% lower temperatures. In this condition, the weight ratio of additive powders for simulation of transmuted elements was ~3%. The differences of responses between the commercial thermocouples and thermocouples simulating transmutation are dependent on the weight ratio of the additive powders. The present data could be used for estimation of response degradation of thermocouples used for long-term operation in a fusion reactor.