System Components and Configuration

The main components of a Super LWR NPP system include the RPV, containment vessel and internals, supercritical steam turbine system and safety systems. The main specifications of a 1700MWe level Super LWR plant system and the improvements from a 1350MWe-class advanced BWR (ABWR) are listed in Table 3.1 [1]. 

A layout for the Super LWR NPP is drawn in Fig. 3.2 [2]. It is a two-loop system. The supercritical steam flows into the turbine system through the outlet nozzles of the RPV and the main steam lines. The water is pumped out of the condenser by a series of pumps and back to the reactor through the inlet nozzles. A series of low pressure and high pressure feedwater heaters are placed upstream and downstream from the main feedwater pumps, respectively, to preheat the cold water before it flows into the reactor. The safety system design and characteristics are discussed in Chap. 6 in detail. 

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Chapters 3-5 treat the plant system and behaviors. They include system components and configuration, plant heat balance, the methods of plant control system design, plant dynamics, plant startup schemes, methods of stability analysis, thermal-hydraulic analyses, and coupled neutronic and thermal-hydraulic stability analyses. 

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