Analyses of Anticipated Transient Without Scram Events

4 Analyses of Anticipated Transient Without Scram Events 

The most important (severest) ATWS events for the Super FR are the loss of flow type ones, the same as in the Super LWR. As an example, the loss of offsite power is analyzed here without a reactor scram. The analysis results without the alternative action of the ADS are shown in Fig. 7.116. Due to the small heat 

Besides the high power density, the small reactivity feedback from the coolant density makes the ATWS behavior of the Super FR severer than that of the Super LWR. However, the ATWS events of the Super FR can be mitigated by effective alternative action(s) as those of LWRs are. 

The Super FR has higher power density than the Super LWR due to no moderator, so that the Super FR has the potential to reduce the plant capital cost further compared to the Super LWR. The studies on the design, control, startup and stability, and safety of the Super FR were introduced in this chapter. 

Fuel rod failure modes and associated fuel rod design criteria were established. As an example of the fuel rod design, the parameters were determined with those criteria including thermo-hydrodynamic and thermo-mechanical considerations. 

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