A reactor produces 3000 MW of thermal power and supplies 1000 MW of electrical power to the grid. What is its overall thermal-to-electrical efficiency?
Options

Question

A reactor produces 3000 MW of thermal power and supplies 1000 MW of electrical power to the grid. What is its overall thermal-to-electrical efficiency?

G1 Physics · Accepted Answer

Efficiency is the useful electrical output divided by the thermal input: η = P(electrical) ÷ P(thermal) × 100%. Thus, η = 1000 ÷ 3000 × 100% = 1 ÷ 3 × 100% ≈ 33.3%. Correct option: C.