Besides their basic design function of steam production, their most important function from a safety point of view is being the barrier between the radioactive primary coolant and the nonradioactive fluids in the water-steam cycle. Steam generators are one of the most important key components of pressurized water reactors. Drexler, in Steam Generators for Nuclear Power Plants, 2017 Abstract This chapter has explained how steam generators are designed, and from here we move to the manufacturing.Ī. The technology of steam generators is mature, in that failures of steam generators, such as catastrophic tube failures, are becoming quite rare. Both broached plate and lattice grid type tube supports are used, always made of stainless steel. These designs use inverted U-bend tubes, and current trends are to use mainly alloy 690 tubing although alloy 800 is still occasionally used. Newer steam generators for the AP1000 reactors weigh in the range of 600 tons each. Some (C-E System 80) weigh as much as 800 tons. These steam generators are typically 20–23 m tall and weigh in the range of 300–500 tons each. This is not the only type of steam generator used (some horizontal in Russian plants and some once-through steam generators in US PWRs), but still the dominant type used. Steam generators of the vertical recirculating type are widely used in both PWR and CANDU reactors. Smith, in Steam Generators for Nuclear Power Plants, 2017 2.9 Conclusions
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