Page 127 - Dynamics and Control of Nuclear Reactors

122 CHAPTER 10 Reactor thermal-hydraulics

FIG. 10.9
Lumped parameter (nodal) structure of a moving boundary U-tube steam generator model
[6].

10.9 Balance-of-Plant (BOP) system models
The components of a balance-of-plant (BOP) system are similar in nuclear power
plants that generate steam using reactor thermal power. These include PWRs, BWRs,
CANDU reactors, sodium fast reactors, gas-cooled reactors, molten salt reactors, and
small modular reactors. Fig. 10.12 shows the major components of a BOP system and
associated state variables [8].
The figure shows the following BOP components:

• Steam chest
• High pressure and low pressure turbines
• Moisture separators and steam reheaters
• Condenser
• Feedwater heaters
• Condenser pressure controller
• Feedwater temperature controller.