Fig. 5 Sketches of (a) recirculating and (b) once-through type PWR steam generators. More

Fig. 6 Worldwide causes of steam generator tube plugging. SCC (ID), primary side SCC; SCC/IGA, outside surface SCC/IGA. Source: Ref 28 More

Fig. 15 Steam generator tube support designs. (a) Drilled without flow holes. (b) Drilled with flow holes. (c) Broached trefoil. (d) Broached quatrefoil (concave contact lands). (e) Egg crate (lattice bars) More

Fig. 17 Intergranular attack of an Alloy 600 steam generator tube (etched sample). Source: Ref 15 More

Fig. 19 Sketch of fouled steam generator (SG) tube/tube support plate (TSP) crevices after many years of operation. Source: Ref 84 More

Fig. 9 Cross-section schematic drawing of a steam generator showing U-tube bundle More

Fig. 16 Cross section through leak in steam-generator wall. Crack extends across weld metal, base metal, and HAZ. Erosion obliterated much of the original crack detail. More

Fig. 17 Fracture morphology of steam-generator wall in a region where regularly spaced striations typical of fatigue are evident. More

Fig. 18 Fracture surface of a failed steam-generator sample. The fracture morphology is characteristic of fatigue cracking, but 1 ppm of Ce − under constant extension rate testing produced this same fracture morphology in laboratory tests. The initiation site is on the inside surface More

Fig. 10 Photographs of a ruptured Inconel 600 steam generator tube. (a) Tube rupture. (b) SEM fractograph showing the IG fracture surface. (c) Micrograph showing the IG attack that extended from the OD surface More

Fig. 15 Schematic view of steam generator indicating the locations for analysis considered in the template presented in Table 4 More

Fig. 9 Cross-sectional schematic drawing of a steam generator showing U-tube bundle More

Fig. 10 Photographs of a ruptured Inconel 600 steam generator tube. (a) Tube rupture. (b) Scanning electron microscopy fractograph showing the intergranular (IG) fracture surface. (c) Micrograph showing the IG attack that extended from the outside diameter surface More

Fig. 65 Cross section through leak in steam-generator wall. Crack extends across weld metal, base metal, and heat-affected zone. Erosion obliterated much of the original crack detail More