NUCLEAR TECHNIQUES, Volume. 46, Issue 9, 090001(2023)
Research progress on SiC irradiation temperature monitors for reactors
Figures & Tables(6)
Fig. 1. SiC monitors machined in match-stick form developed at CIAE
Fig. 2. Schematic diagram of irradiation capsule containing a SiC monitor and thermocouple
Fig. 4. XPS spectra of Si 2p core levels taken from the pristine and thermal-annealed SiCs before (a)and after (b) bathing in HF acid. The thermal-annealed SiC sample was pre-irradiated with neutrons to 0.02 DPA, the annealing temperature was 685 ℃
Table 1. Characteristics and accuracy for different SiC monitor measurement methods
View tableView in ArticleTable 1. Characteristics and accuracy for different SiC monitor measurement methods
方法
Methods
主要特点
Characteristics
测温精度
Accuracy
宏观尺寸法
Macro-size
method
使用CVD法制备的全致密SiC；测温精度随温度升高而降低
Using full-density CVD-SiC; measurement accuracy decreases with increasing temperature
±（20~30）℃[ 23 ]质量密度法
Specific density
method
不受监控器尺寸和形状限制；耗时长、成本高
Arbitrary size and shape of monitors; time consuming and high cost
± 30 ℃[ 1 ]热导率法
Thermal diffusivity
method
有商用测试装置；监控器尺寸小，可用于温度梯度区域的测温分析
Using commerically available thermal diffusivity systems; analysis of temperature gradients due to small size of monitors
± 40 ℃[ 1 ]晶格肿胀法
Lattice swelling
method
在较低中子剂量（<10 DPA）下[
24 ]，与宏观尺寸法具有等效性，但测试方法更为简便，测温精度高Identical to macro-size method with neutron doses <10 DPA[
24 ]; ease of application and high accuracy± 20 ℃[ 14 ]电阻率法
Electrical resistivity
method
测试方法简便，测温精度高，可用于低中子剂量下的温度测量
Ease of application and high accuracy; measuring temperatures at low neutron doses
≤ 20 ℃[ 2 ]
Table 2. SiC monitor temperature measurement results
View tableView in ArticleTable 2. SiC monitor temperature measurement results
中子剂量
(E>0.1 MeV) Neutron dose
热电偶
Thermocouple
SiC电阻法
Resistivity method of SiC
SiC晶格肿胀法
Lattice swelling method of SiC
0.02 DPA (550±20) ℃ 615 ℃ — 0.32 DPA (275±20) ℃ ~400 ℃ (408±5) ℃ *
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Xinyu LIU, Limin ZHANG, Guangsheng NING, Weihua ZHONG, Shenghong WANG, Anping HE. Research progress on SiC irradiation temperature monitors for reactors[J]. NUCLEAR TECHNIQUES, 2023, 46(9): 090001
Paper Information
Category: Research Articles
Received: Aug. 8, 2023
Accepted: --
Published Online: Oct. 8, 2023
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