共查询到15条相似文献,搜索用时 46 毫秒
1.
《核动力工程》2013,(5):84-88
采用手工惰性气体钨极保护焊(TIG焊)制备反应堆压力容器密封面材料E308LMoT0-3、E309LMoT0-3及对比材料ER308 L的不锈钢堆焊层,对其进行硬度测试、显微组织观察、抗晶间腐蚀性能分析,以及点蚀点位测量和偏离水质条件下的局部腐蚀试验,研究E308LMoT0-3、E309LMoT0-3堆焊材料的点腐蚀和缝隙腐蚀性能以及腐蚀机理。试验结果表明,E308LMoT0-3、E309LMoT0-3焊丝堆焊后的试样除了具有良好的硬度、耐晶间腐蚀性能外,还具有良好的耐局部腐蚀性能,可以代替目前压水堆核电厂普遍使用的ER308L不锈钢堆焊材料。 相似文献
2.
两种不同密封面结构反应堆压力容器的密封性能对比研究 总被引:1,自引:0,他引:1
反应堆压力容器(RPV)密封面结构是影响RPV密封性能的重要因素。建立2种不同密封面结构的RPV三维有限元模型,研究其对RPV密封性能的影响,并得到上、下法兰轴向分离量以及主螺栓载荷等分析评价RPV密封性能的关键指标,同时,对比分析2种密封面结构形式的安全裕量,为优化RPV密封面结构设计提供理论依据。 相似文献
3.
4.
5.
6.
7.
8.
9.
10.
11.
LOCA下具有表面裂纹的反应堆压力容器承压热冲击分析 总被引:1,自引:0,他引:1
失水事故(LOCA)瞬态下,具有半椭圆形表面裂纹的反应堆压力容器(RPV)承压热冲击(PTS)问题被研究。采用有限元方法计算瞬态过程的热-应力响应;采用影响函数法计算应力强度因子,分别对母材和堆焊层内的应力进行分解,从而解决了由于堆焊层存在造成的应力拟合困难带来的计算偏差。编制了相应的断裂分析程序,对LOCA下RPV的结构完整性进行了分析。结果表明,在研究的LOCA下,整个瞬态过程中RPV应力强度因子均未超过材料断裂韧性,压力容器结构安全。本文研究为RPV在PTS下的结构完整性评估提供理论指导。 相似文献
12.
13.
14.
《Journal of Nuclear Science and Technology》2013,50(11):1145-1152
Abstract A sintered product of cesium aluminum silicate, CsAlSi5O12, formed an outer precipitated layer and a reaction layer when exposed to 3.0 M (= mol/dm3) NaCl under hydrothermal conditions above 250°C to 300°C. The precipitated layer consisted of crystallized phases of analcime and montmorillonite, and the reaction layer exhibited a concentration gradient for Cs. These layers grew with temperature and reaction time. When the solid sample was contacted with NaCl solutions below 0.1 M, the crystallized phase of pollucite was formed in the precipitated layer. Successive accumulation of pollucite layer contributed to the depression of leaching of Cs. 相似文献
15.
《Journal of Nuclear Science and Technology》2013,50(12):1112-1120
The depositionof Ni and Co ions on a heated surface of simulating fuel rods has been studied in water at atmospheric and 70 atm pressures during nucleate boiling. The effects of various factors, including heat flux of the heated surface, concentration of coexisting iron oxide (αFe2O3 and concentration of Ni and Co ions, on their deposition rate have been investigated. The model for iron oxide deposition which is based on microlayer evaporation and drying out phenomena in the nucleate boiling bubble was shown to be applicable to the deposition of Ni and Co ions. That is, dW/dt=K.Q.C/L, where dW/dt is the deposition rate, K the deposition rate coefficient, Q the heat flux, C the ion concentration, and L the latent heat of vaporization. The K value of Ni ion is about 0.1 and independent of iron oxide concentration. On the hand, the K value of Co ion increases with iron oxide concentration and seems to approach that of iron oxide concentration and seems to approach that of iron oxide (0.3). The Co ion deposited with iron oxide forms Co ferrite. Solubility of Co ferrite is small compared with that of Co deposits without iron oxide (CoO or Co(OH)2). The increase in the K value of Co ion with iron oxide concentration is attributed to the change in chemical form of Co deposits into more stable species not favoring Co release. 相似文献