Transient junction point

Note The network strueture of a transient polymer network is based on transient junction points or crosslinks arising from interactions between polymer chains. 

The plant transient analysis code for the Super FR is called SPRAT-F. It is based on the 1-D node junction model with radial heat transfer and point kinetics models such as SPRAT-DOWN for the Super LWR (see Chaps. 4 and 6). The nodalization is shown in Fig. 7.67. The models used in SPRAT-F are the same as those in SPRAT-DOWN. The turbine control valve regulates the main steam pressure by changing the main steam flow rate as in BWRs and the Super LWR. The relation between its stroke and the steam flow rate is the same as that of the Super LWR (Fig. 4.4). The relation between the core pressure and the feedwater flow rate (with constant pump speed) is also the same as that in the Super LWR (Fig. 4.5). 

This relationship is used in the capacitance-voltage technique for profiling carrier concentrations near diode junctions and is usable for any type of diode in which one side of the junction is much more heavily doped than the other. It can also be used in a transient mode to detect and analyze point defects as they charge and discharge with bias voltage changes. 

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