Measurement of the residual stresses in a PWR Control Rod Drive Mechanism nozzle
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Residual stress in the welds that attach Control Rod Drive Mechanism nozzles into the upper head of a PWR reactor vessel can influence the vessel’s structural integrity and initiate Primary Water Stress Corrosion Cracking. PWSCC at Alloy 600 CRDM nozzles has caused primary coolant leakage in operating PWRs. We have used Deep Hole Drilling to characterise residual stresses in a PWR vessel head.
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Measurement of the residual stresses in a PWR Control Rod Drive Mechanism nozzle
Nội dung trích xuất từ tài liệu:
Measurement of the residual stresses in a PWR Control Rod Drive Mechanism nozzle
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