By 2020 India need 2,00,000 MW of electric energy per year, out of which 10% of energy is to be obtained from nuclear power plants.

Thus, Nuclear power plants should produce,

= 20,000×106×365×24×60×60 J

= 6.3072×1017 J of energy

Given that Fission of one releases 200 MeV of energy.

200 MeV = 200×106×1.6×10-19 J = 3.2×10-11 J

Since, reactor is 25% efficient, total energy produced per atom,

Ea = 0.25×3.2×10-11 J = 8×10-12 J

Number of atoms to be fission to produce required energy,

We know that, 235 g Uranium contains 6.023×1023 atoms.

Thus, for 7.884×1028 atoms we need,

Hence, India need 3.076×104 Kg of uranium in 2020 to produce sufficient electricity.

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