The function of moderators in nuclear reactor is to

CANDU type nuclear reactor using natural uranium as fuel is the extensively used nuclear reactor because of the fact that the

A

Specific fuel consumption is very low due to the use of heavy water

B

Fuel cost is much lower than that used in pressurised water or boiling water reactor

C

Heavy water is used both as coolant as well as moderator

D

Both B and C

If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor.

A

Critical

B

Breeder

C

Fertile

D

Heterogenous

In case of a __________ reactor, the composition in the reactor and at the exit of the reactor is the same.

A

Semi-batch

B

Tubular

C

Batch

D

Back-mix

Effective moderators are those materials which contain

A

Light weight atoms

B

Heavy weight atoms

C

Critical atoms

D

Zero weight atoms

A nuclear reactor is said to be critical when the neutron population in the reactor core is

A

Rapidly increasing leading to the point of explosion

B

Decreasing from the specified value

C

Reduced to zero

D

Constant

Thermal shield used in high powered nuclear reactor to protect the walls of the reactor from radiation damage is made of

A

Concrete

B

Steel

C

Zircalloy

D

Graphite

A thermal nuclear reactor compared to a fast breeder reactor

A

Uses slower neutrons for fission

B

Uses faster neutrons for fission

C

Gives higher power density

D

Requires less fuel to run at the same power level

Function of control rod in a nuclear reactor is to control

A

Temperature

B

Pressure

C

Fuel consumption

D

Absorption of neutrons

Heavy water is used as a moderator in a nuclear reactor. The function of the moderator is

A

to control the energy released in the reactor

B

to absorb neutrons and stop the chain reaction

C

to cool the reactor

D

to slow down the neutrons to thermal energy

The function of heavy water in a nuclear reactor is to

A

Slow down the speed of neutrons

B

Increase the speed of neutrons

C

Cool down the reactor

D

Stop the nuclear reaction

The function of moderators in nuclear reactor is to

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