Calculation of Fuel Rod Strength Under Steady-State Operating Condition

IF 0.7 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Science Pub Date : 2024-06-18 DOI:10.1007/s11003-024-00814-6
S. S. Lys
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Abstract

The results of thermal calculations of the part of the fuel assembly of the active zone of the VVER-1000 reactor in the stationary mode of operation make it possible to evaluate the mechanical state of the fuel rod cladding, to understand the influence of reactor control methods on the strength and the design acceptance criteria. The main principles of the evaluation of mechanical characteristics of VVER-1000 fuel rods using the START-3 code are presented. The results of the prediction of the mechanical characteristics of the VVER-1000 fuel rods during the 4-year cycle in stationary mode under normal operating conditions and under their violation are illustrated. The maximum values of stress in the fuel rod in the stationary mode of operation are in the range of 60–80 MPa, which cannot cause depressurization of the fuel rod.

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稳态运行条件下的燃料棒强度计算
VVER-1000 反应堆活动区燃料组件部分在静态运行模式下的热计算结果使得对燃料棒包壳的机械状态进行评估、了解反应堆控制方法对强度和设计验收标准的影响成为可能。本文介绍了使用 START-3 代码评估 VVER-1000 燃料棒机械特性的主要原则。对 VVER-1000 燃料棒在正常运行条件下的 4 年周期内静止模式下的机械特性进行了预测,并说明了在违反规定的情况下的机械特性。在静止运行模式下,燃料棒的最大应力值在 60-80 兆帕之间,不会导致燃料棒减压。
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来源期刊
Materials Science
Materials Science 工程技术-材料科学:综合
CiteScore
1.60
自引率
44.40%
发文量
63
审稿时长
4-8 weeks
期刊介绍: Materials Science reports on current research into such problems as cracking, fatigue and fracture, especially in active environments as well as corrosion and anticorrosion protection of structural metallic and polymer materials, and the development of new materials.
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