Residual Stress Measurement and the Effect of Heat Treatment in Cladded Control Rod Drive Specimens

被引：0

作者：

Bowman, Ashley ^{[1
]}

Kingston, Ed ^{[1
]}

Katsuyama, Jinya

Udagawa, Makoto

Onizawa, Kunio

机构：

[1] VEQTER Ltd, Bristol BS1 5UB, Avon, England

来源：

15TH INTERNATIONAL CONFERENCE ON ENVIRONMENTAL DEGRADATION OF MATERIALS IN NUCLEAR POWER SYSTEMS-WATER REACTORS | 2011年

关键词：

Residual Stress; Cladding; J-groove Weld; Structural Integrity; CRD;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper presents results of residual stress measurements and modelling within the cladding and J-groove weld of Control Rod Drive (CRD) specimens in the as-welded and Post Weld Heat Treated (PWHT) states. Knowledge of the residual stresses present in CRD nozzles is critical when modelling the fracture mechanics of failures of nuclear power plant components to dictate inspections intervals and optimise plant downtime. The specimens comprised of ferritic steel blocks with 309L stainless steel cladding and a single J-groove weld attaching the 304 stainless steel nozzles. Multiple measurements were made through the thickness of the specimens in order to give biaxial residual stress profiles through all the different fusion boundaries. The results show the effect of PWHT in reducing residual stresses both in the weld and ferritic material. The beneficial use of measurements is highlighted to provide confidence in the modelled results and prevent over conservatism in integrity calculations, costing unnecessary time and money.

引用

页码：2231 / 2243

页数：13

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