[en] Optimization problems related to nuclear power district heating plant (NPDHP) operation are considered. A method is considered for heat transfer from a NPDHP by warming the heating-system water with heat removed from the reactor core coolant. This method is based on the fact that greater subcooling of coolant entering the core results in a higher margin up to a critical heat transfer following a linear law. Reactor power can be also increased according to the same law. To evaluate competitiveness of thermal load addition schemes based on using the possibility of increasing a reactor power, different versions of covering users' thermal loads were considered. NPDHP with a boiling reactor with integral steam generator layout and a separator placed outside of the reactor vessel. The calculation results show the schemes of heat transfer from NPDHP, based on using the dependence of available thermal reactor power on the temperature subcooling to the coolant boiling at the core inlet, to be promising