Nuclear Power Engineering - Chemical Engineering Questions and Answers

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Which is not a fissile nuclear material ?

U-233

U-235

U-238

Pu-239

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Nuclear fuel usually used in a Boiling Water Reactor (BWR) is

plutonium

enriched uranium

natural uranium

thorium

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The new nucleus formed after β-decay of a radioactive element has

less atomic number

less atomic weight

more atomic number

more atomic weight

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Energy produced in the nuclear fission is of the order of __________ MeV.

200

1000

2000

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Pressure in a Pressurised Water Reactor (PWR) is used for

maintaining constant pressure in the primary cooling circuit under varying loads.

superheating the steam.

pressurising the water in the primary coolant circuit.

none of these.

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Pick out the wrong statement.

The disintegration rate of a radioactive substance can not be increased by heating it.

Electrons have negligible mass and unit negative change.

Deuterium atom has one proton and two neutrons in its nucleus.

Cadmium is capable of absorbing neutrons.

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Water is a better coolant than a gas (like CO₂, He, N₂ etc.), because it

is a better neutron moderator as well.

requires comparatively smaller pumps and heat exchanger for a given heat transfer rate.

has a better heat transfer characteristics, and it can be pressurised to attain a high temperature.

all (a), (b) and (c).

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Net efficiency of ordinary light water cooled nuclear reactor is about __________ percent.

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The sum of masses of two nuclei produced in nuclear fission compared to the mass of original nucleus is

less

same

much more