Thermomechanical Response Simulation of FeCrAl and Zr-2 Fuel Claddings Under Neutron Irradiation

被引：0

作者：

Zhao Hui ^{[1
]}

Yang Chong ^{[1
]}

Guo Dongxu ^{[1
]}

Wu Lu ^{[2
]}

Pan Rongjian ^{[2
]}

Qin Jiantao ^{[2
]}

Shi Baodong ^{[1
]}

机构：

[1] Yanshan Univ, Natl Engn Res Ctr Equipment & Technol Cold Rolled, Sch Mech Engn, Qinhuangdao 066004, Hebei, Peoples R China

[2] Nucl Power Inst China, Subinst 1, State Key Lab Nucl Fuel & Mat, Chengdu 610041, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2022年 / 51卷 / 07期

基金：

中国国家自然科学基金;

关键词：

neutron irradiation; irradiation creep; FeCrAl; Zr-2; cladding; THERMAL-CONDUCTIVITY; HEAT-CAPACITY; ALLOYS; BEHAVIOR; ZIRCALOY-2; STEADY; CREEP;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The representative C35M alloy among FeCrAl alloys was selected as the research object, and a small fuel rod model was established. Based on the user material (UMAT) subroutine, the radiation creep model of the C35M alloy was embedded in the subroutine. The thermomechanical coupling behavior of C35M alloy under neutron irradiation was calculated by the finite element software ABAQUS. Using Zr-2 alloy as a comparison, the evolution of the distribution of the temperature field, stress field, displacement field, and gap distance of the cladding over time of the alloys was analyzed. Results show that the temperature field and the stress field of the two alloys are basically the same. The temperature distribution is mainly affected by the coolant, while the stress field is related to the temperature and creep rate. During the simulation, the Zr-2 alloy mainly grows through irradiation, while C35M alloy shows the irradiation creep and has a little thermal expansion deformation. The gap closure rate of Zr-2 alloy is much faster than that of C35M alloy, which indicates that C35M alloy can prolong the accident response time. However, in order to adapt to the complex environment in the reactor, the material still needs to be optimized to improve its strength and creep rate.

引用

页码：2460 / 2466

页数：7

共 33 条

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