Coupled Neutronic Thermal-Hydraulic Stability Analysis Method

2 Coupled Neutronic Thermal-Hydraulic Stability Analysis Method 

Like in the thermal-hydraulic stability analyses, the frequency domain analysis method is used here, too. The mathematical model contains six submodels - the neutron kinetics model, the fuel rod heat transfer model, water rod heat transfer model, fuel channel thermal-hydraulic model, water rod thermal-hydraulic model, and the excore circulation system model. The fuel channel thermal-hydraulic model and water rod thermal-hydraulic model are the same as the thermal-hydraulic stability analysis model described in Sect. 5.4.3. 

Point neutron kinetics equations with six delayed neutron precursor groups are employed to calculate the transfer functirm from reactivity to core power. 

Group Effective delayed neutrrai Effective delayed 

Here jS is the effective delayed neutron fraction. The delayed neutron data for the Super LWR are given in Table 5.10. 

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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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