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Fatigue lifetime analysis on fuel cladding in marine reactor
- NUCLEAR TECHNIQUES Vol. 40, Issue 5, Article number: 050606(2017)
- 作者机构：
中国科学技术大学 核科学技术学院 合肥 230027
- 作者简介：
- 基金信息：Supported by National Natural Science Foundation of China
DOI：10.11889/j.0253-3219.2017.hjs.40.050606
CLC： TL341Received：20 February 2017，
Revised：09 March 2017，
Published：10 May 2017
- 稿件说明：
移动端阅览
Fei LI, Lei PENG, Jingyi SHI, et al. Fatigue lifetime analysis on fuel cladding in marine reactor[J]. Nuclear techniques, 2017, 40(5): 050606
Fei LI, Lei PENG, Jingyi SHI, et al. Fatigue lifetime analysis on fuel cladding in marine reactor[J]. Nuclear techniques, 2017, 40(5): 050606 DOI： 10.11889/j.0253-3219.2017.hjs.40.050606.
摘要
船用堆瞬态变工况下燃料棒包壳温度和冷却剂压力波动较大，引起包壳的疲劳损伤，因此包壳疲劳寿命分析至关重要。本文利用ANSYS软件模拟船用堆瞬态变工况下燃料棒的热机械行为，结合锆包壳疲劳寿命设计曲线，考察包壳温度、冷却剂压力、燃料棒内压以及辐照对船用堆燃料棒包壳疲劳寿命的影响。计算结果表明，瞬态变工况使得包壳疲劳寿命有很大降低；包壳温度变化与冷却剂压力变化相比，前者对包壳疲劳寿命的影响小；辐照会降低包壳疲劳寿命。在不影响核动力船舶机动性的前提下，可采取一些必要的措施来降低包壳的疲劳损伤。
Abstract
Background
2
The maneuverability of nuclear-powered ships requires the sharp step change of the output power of the marine reactor
which causes fluctuation of fuel cladding temperature and coolant pressure. Since the enormous fluctuation leads to fatigue damage of cladding
it is important to analyze the fatigue lifetime of the fuel claddings in marine reactor. Purpose:The purpose is to analyze the effects of cladding temperature
coolant pressure
internal pressure of fuel rod and irradiation on the fatigue lifetime.
Methods
2
By using ANSYS
the thermalmechanical behaviors of fuel rods in transient operation condition were simulated. The fatigue lifetime of cladding under different conditions was investigated
based on the design curves of the fatigue lifetime for zircaloy cladding.
Results
2
The results indicate that the fatigue lifetime of the fuel cladding in marine reactor will reduce much in transient operation condition and irradiation can reduce fatigue lifetime of fuel cladding. The change of cladding temperature has little effect on the fatigue lifetime of cladding
compared with the change of coolant pressure.
Conclusion
2
The fatigue damage in the fuel cladding in marine reactor is very serious. Suitable measures are suggested to take in order to reduce the fatigue damage of the cladding
under the premise of ensuring the maneuverability of ships.
关键词
Keywords
references
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