Primary Loop Duplex Stainless Steel Cast Elbow Aging and French Maintenance Strategy

摘要

Aging of the Cast Austenitic-Ferritic Components Used in the Pringcipal Primary Circuit On the 900 MW and early 1 300 MW plant units several parts of the principal primary loop are made of cast austenitic-ferritic stainless steel. These parts are namely: elbows, some valve casings, pump casings, lateral and straight pipes, and tubes.