[0033] The feedwater from the condenser system 18 is introduced into the downcomer region 24 of the reactor pressure vessel 12 radially outside the core shroud 22 via one or more lines 34 as is known in the art. Sparger piping can be utilized to distribute the feedwater as is known in the art. The condensate from the isolation condenser system 30 is also usually introduced into the downcomer region 24 of the reactor pressure vessel 12 radially outside the core shroud 22 via one or more lines 36. Sparger piping can be utilized to distribute the condensate as is known in the art. [0034] An example embodiment includes a return line 40 for returning all or a part of the isolation condenser system 30 condensate inside the core shroud 22 into either the chimney 42 or upper plenum 44 region of the reactor pressure vessel 12 using one or more lines 40 (one of which is shown). The isolation condenser system 30 condensate flow through line 40 that is returned inside the core shroud 22 and reduces the core flow and will generally cause the core power to decrease. Steam supply to the isolation condenser system 30 occurs higher in the reactor pressure vessel 12 above the normal operating water level. The isolation condenser system 30 steam supply 32 may be from one or more separate lines 32 or extracted from one or more main steam lines 50 that is connected to the turbine 14. Normally feedwater 34 is returned into the downcomer region 24 above the upper plenum at about the level of the steam separators (not shown) . [0035] At least one embodiment includes an alternative feedwater supply line 52 with a control valve 53 to selectively supply the feedwater inside the core shroud 22 into either the chimney 42 or upper plenum 44 of the reactor pressure vessel 12. The portion of feedwater that is directed inside