Effects of process-generated hydrogen on RPV walls

2. Findings in Doel 3 and Tihange 2

Figure 2.1: Examinated zones in 10-yearly quality control of the RPV, according to the ASME Code Section XI. [8] The blue zones are examined by Visual Testing, while the red zones are examined by Ultrasonic Testing. [9]

Figure 2.2: Schematic representation of an underclad defect in the RPV wall. [12]

Figure 2.3: Stresses in a RPV wall. Hoop and axial stresses can be signifi- cant as a result of thermal and pressure gradients over the RPV wall. [9]

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