What would happen if the grid connection was severed by bombing? Is there no emergency shutdown mechanism where the output is just dumped into some artificial load?
Then again, a 5700MW resistor might require a bit of cooling.
Then again, a 5700MW resistor might require a bit of cooling.
The power would not be dumped into a resistor: the power would be dumped in form of heat with the turbogenerator disconnected from steam. I expect that you can "just" dump it in the condenser and use the standard cooling of the condenser to dump it into the local body of water. If that's insufficient, one can dump steam from the secondary loop into atmosphere (which necessitates adding water there). You can play with a vver-1000 simulator and see how many of these things work; the simulator whose manual I'm citing above can be easily found on the internet.
If you disconnect the load, you need to stop putting steam through the turbine and dump it somewhere else (i.e. a condenser). All steam turbine plants (including coal) have something similar.