Steam generator forgings

Sasaki T, Murai E, Sato I, Suzuki K, Kusuhashi M and Tsukada H, Current steel forgings and their properties for steam generator of nuclear power plant . The Thermal and Nuclear Power, 2001, 52, 675-682. 

The steam generator outlet nozzles are one piece forgings with an integral venturi type flow restrictor. The venturi section of the nozzle is designed to reduce the flow area by 70%. 

The pre-construction phase B allows for the plant owner s work on site infrastructures before the construction proper can start. It also gives time for the supplier to prepare the construction effort for plants of a more or less standardized design. It is foreseen that the supplier would place orders for some major components, e.g. big forgings or the whole reactor vessel and steam generators, already after the letter of intent. This may not be possible for many of the SMPR concepts, as the detailed designs still have to be completed, in this case the supplier could require and extension of the preconstruction phase by possibly several years. The schedule given by Rolls Royce (Fig. 3.4.-2) for the completion of a series of SMPR projects demonstrates these points very, well with delays in these phases for the first plant not recurring for in subsequent ones. 

---