Secondary-side passive waste heat discharging system for ship pressurized water reactor

The invention relates to a secondary-side passive waste heat discharging system for a ship pressurized water reactor. The system comprises a safety shell, and a high-altitude water tank arranged outside the saftey shell and in a wall face of a ship body, and the system also comprises a reactor pressure container, a steam generator and a passive waste heat discharging condenser, wherein the steam generator is higher than the reactor pressure container in position, and a primary side of the steam generator is communicated with the reactor pressure container respectively by virtue of a main pipeline cooling section and a main pipeline hot section; the passive waste heat discharging condenser is soaked in a water source of the high-altitude water tank, and the bottom of the passive waste heat discharging condenser is higher than a liquid surface in the steam generator; and the passive waste heat discharging condenser is communicated with a secondary side of the steam generator respectively by virtue of a steam pi