A theoretical design procedure for cladding protecting lower head of central measuring shroud from thermal shock damage

IF 1.9 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Annals of Nuclear Energy Pub Date : 2025-03-11 DOI:10.1016/j.anucene.2025.111338

Shu Zheng , Daogang Lu , Qiong Cao , Yuxiong Xue

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Abstract

The cladding serves as a protective barrier for the central measuring shroud, safeguarding it from thermal shock damage caused by the SCRAM events. To facilitate rapid preliminary design, a theoretical design procedure of the cladding was developed based on thermal, mechanical and creep-fatigue damage theories. Then, the design was performed according to actual operating conditions. It was found that the procedure can reduce design time and computational costs of the design, but needs to be adjusted because of stress concentration, with an adjustment factor of 7.32 for the total thickness design and 22.677 for the layer thickness design. The final design features a total cladding thickness of 6 mm, comprising two layers of 3 mm each. Analysis showed that cladding can mitigate heat conduction from the coolant. Specifically, increasing the cladding thickness from 0 to 6 mm reduced the maximum temperature difference by 49 °C and decreased the maximum stress amplitude by 2.35 × 10⁸ Pa.

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来源期刊

Annals of Nuclear Energy 工程技术-核科学技术

CiteScore

4.30

自引率

21.10%

发文量

632

审稿时长

7.3 months

期刊介绍： Annals of Nuclear Energy provides an international medium for the communication of original research, ideas and developments in all areas of the field of nuclear energy science and technology. Its scope embraces nuclear fuel reserves, fuel cycles and cost, materials, processing, system and component technology (fission only), design and optimization, direct conversion of nuclear energy sources, environmental control, reactor physics, heat transfer and fluid dynamics, structural analysis, fuel management, future developments, nuclear fuel and safety, nuclear aerosol, neutron physics, computer technology (both software and hardware), risk assessment, radioactive waste disposal and reactor thermal hydraulics. Papers submitted to Annals need to demonstrate a clear link to nuclear power generation/nuclear engineering. Papers which deal with pure nuclear physics, pure health physics, imaging, or attenuation and shielding properties of concretes and various geological materials are not within the scope of the journal. Also, papers that deal with policy or economics are not within the scope of the journal.