放射性裂变产物由燃料芯块释放到一回路的影响因素研究

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Analysis of Effects on Radioactive Fission Product Release from Fuel Pellet to Coolant

Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 61004l, China

摘要: 采用PROFIP5程序分析燃料棒线功率密度、衰变常数和破口尺寸等对放射性裂变产物释放的影响。结果表明:当燃料棒中心温度低于1000℃时,裂变产物的释放份额与燃料棒温度无关;当燃料棒中心温度高于1000℃时,燃料棒温度越高,裂变产物的释放份额越大;燃料棒线功率密度越高,衰变常数对释放份额的影响越明显。
- 放射性裂变产物 /
- 燃料芯块 /
- 释放 /
- 影响因素
Abstract: PROFIP5 was used to analyze the effects of linear heat rate,decay constant and defect size on fission product fraction release.Conclusions about fission product release were drawn:at temperature below 1000℃,the release fractions are independent of temperature;at temperature above 1000℃,the release fractions increase with the temperature;For the same chemical species,the release fractions decrease as the decay constants increase,and this phenomenon is more obvious as the linear heat rate increases.
- Radioactive fission product /
- Fuel pellet /
- Release /
- Effect analysis