What is the direct function of the energy released from the nuclear chain reaction in a nuclear power plant?

turning the blades of the turbine

heating water to produce steam

powering the condenser
carrying electricity from the plant to consumers

The appropriate response is warming water to deliver steam.  

Explanation:

The structure of an atomic vitality plant and a plant that works with petroleum products are comparative as in both utilize the warmth of a response to deliver steam. From that point forward, the steam is utilized to move turbines, which produce power.  In an atomic plant, the warmth is created by the atomic parting response, while in a common vitality plant the warmth is delivered by the synthetic response (burning) of the non-renewable energy source (carbon, oil, gas).