# A nuclear power plant generates 750 MW; the reactor temperature is 315 °C and a river with water at a temperature of 20 °C.(a) What is the maximum possible thermal efficiency of the plant, and what is the minimum rate at which heat must be discarded to the river?(b) If the actual thermal efficiency of the plant is 60% of the maximum thermal efficiency, at what rate must heat be discarded to the river? What is the temperature rise of the river if it has a flow rate of 165 m3/s? Assume a constant heat capacity (4.184 kJ/kg-K) and density (997 kg m-3) of the water.

A nuclear power plant generates 750 MW; the reactor temperature is 315 °C and a river with water at a temperature of 20 °C.
(a) What is the maximum possible thermal efficiency of the plant, and what is the minimum rate at which heat must be discarded to the river?
(b) If the actual thermal efficiency of the plant is 60% of the maximum thermal efficiency, at what rate must heat be discarded to the river? What is the temperature rise of the river if it has a flow rate of 165 m3/s? Assume a constant heat capacity (4.184 kJ/kg-K) and density (997 kg m-3) of the water.

(550 words)

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